./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-symm.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/array-eq-symm.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 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:14:00,044 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:14:00,092 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:14:00,099 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:14:00,100 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:14:00,123 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:14:00,124 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:14:00,124 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:14:00,125 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:14:00,125 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:14:00,125 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:14:00,126 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:14:00,126 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:14:00,126 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:14:00,127 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:14:00,127 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:14:00,128 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:14:00,128 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:14:00,128 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:14:00,129 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:14:00,129 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:14:00,129 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:14:00,130 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:14:00,130 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:14:00,130 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:14:00,131 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:14:00,131 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:14:00,132 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:14:00,132 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:14:00,132 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:14:00,133 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:14:00,133 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:14:00,133 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:14:00,134 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:14:00,134 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:14:00,135 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:14:00,135 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:14:00,135 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:14:00,136 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:14:00,136 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:14:00,136 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:14:00,138 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:14:00,139 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:14:00,139 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2024-01-27 15:14:00,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:14:00,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:14:00,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:14:00,391 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:14:00,392 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:14:00,392 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2024-01-27 15:14:01,526 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:14:01,702 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:14:01,703 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2024-01-27 15:14:01,709 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc18ffa8c/0db6737c0394413b98455fc26615366d/FLAG5c011f12a [2024-01-27 15:14:01,724 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc18ffa8c/0db6737c0394413b98455fc26615366d [2024-01-27 15:14:01,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:14:01,728 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:14:01,729 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:14:01,729 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:14:01,733 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:14:01,733 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:14:01" (1/1) ... [2024-01-27 15:14:01,734 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66a63409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:01, skipping insertion in model container [2024-01-27 15:14:01,734 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:14:01" (1/1) ... [2024-01-27 15:14:01,763 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:14:01,952 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/array-eq-symm.wvr.c[2277,2290] [2024-01-27 15:14:01,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:14:01,966 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:14:01,984 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/array-eq-symm.wvr.c[2277,2290] [2024-01-27 15:14:01,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:14:02,000 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:14:02,001 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:02 WrapperNode [2024-01-27 15:14:02,001 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:14:02,003 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:14:02,003 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:14:02,003 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:14:02,009 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:02" (1/1) ... [2024-01-27 15:14:02,017 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:02" (1/1) ... [2024-01-27 15:14:02,035 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 117 [2024-01-27 15:14:02,036 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:14:02,037 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:14:02,037 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:14:02,037 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:14:02,047 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:02" (1/1) ... [2024-01-27 15:14:02,047 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:02" (1/1) ... [2024-01-27 15:14:02,054 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:02" (1/1) ... [2024-01-27 15:14:02,072 INFO L175 MemorySlicer]: Split 12 memory accesses to 4 slices as follows [2, 2, 6, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 2, 1]. [2024-01-27 15:14:02,076 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:02" (1/1) ... [2024-01-27 15:14:02,076 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:02" (1/1) ... [2024-01-27 15:14:02,083 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:02" (1/1) ... [2024-01-27 15:14:02,087 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:02" (1/1) ... [2024-01-27 15:14:02,088 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:02" (1/1) ... [2024-01-27 15:14:02,089 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:02" (1/1) ... [2024-01-27 15:14:02,092 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:14:02,102 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:14:02,102 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:14:02,102 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:14:02,103 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:02" (1/1) ... [2024-01-27 15:14:02,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:14:02,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:02,137 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 15:14:02,160 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 15:14:02,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:14:02,197 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:14:02,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:14:02,197 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:14:02,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:14:02,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:14:02,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:14:02,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:14:02,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:14:02,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:14:02,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:14:02,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:14:02,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:14:02,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:14:02,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:14:02,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:14:02,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:14:02,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:14:02,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:14:02,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:14:02,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:14:02,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:14:02,202 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 15:14:02,301 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:14:02,303 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:14:02,563 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:14:02,564 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:14:02,761 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:14:02,762 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-27 15:14:02,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:14:02 BoogieIcfgContainer [2024-01-27 15:14:02,762 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:14:02,764 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:14:02,764 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:14:02,767 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:14:02,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:14:01" (1/3) ... [2024-01-27 15:14:02,768 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1dc8dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:14:02, skipping insertion in model container [2024-01-27 15:14:02,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:02" (2/3) ... [2024-01-27 15:14:02,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1dc8dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:14:02, skipping insertion in model container [2024-01-27 15:14:02,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:14:02" (3/3) ... [2024-01-27 15:14:02,770 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2024-01-27 15:14:02,778 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:14:02,787 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:14:02,787 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:14:02,787 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:14:02,840 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:14:02,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 29 transitions, 72 flow [2024-01-27 15:14:02,927 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2024-01-27 15:14:02,928 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:14:02,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 6/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-01-27 15:14:02,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 29 transitions, 72 flow [2024-01-27 15:14:02,935 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 26 transitions, 64 flow [2024-01-27 15:14:02,950 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:14:02,956 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;@1ab12030, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:14:02,956 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:14:02,971 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:14:02,971 INFO L124 PetriNetUnfolderBase]: 6/25 cut-off events. [2024-01-27 15:14:02,971 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:14:02,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:02,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:02,972 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:02,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:02,977 INFO L85 PathProgramCache]: Analyzing trace with hash -28525233, now seen corresponding path program 1 times [2024-01-27 15:14:02,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:02,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390691875] [2024-01-27 15:14:02,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:02,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:03,462 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 15:14:03,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:03,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390691875] [2024-01-27 15:14:03,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390691875] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:03,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:03,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:14:03,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442359907] [2024-01-27 15:14:03,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:03,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:14:03,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:03,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:14:03,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:14:03,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:03,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 15:14:03,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:03,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:03,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:03,646 INFO L124 PetriNetUnfolderBase]: 219/344 cut-off events. [2024-01-27 15:14:03,647 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-01-27 15:14:03,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 344 events. 219/344 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1216 event pairs, 45 based on Foata normal form. 1/233 useless extension candidates. Maximal degree in co-relation 596. Up to 221 conditions per place. [2024-01-27 15:14:03,654 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 35 selfloop transitions, 3 changer transitions 1/42 dead transitions. [2024-01-27 15:14:03,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 42 transitions, 183 flow [2024-01-27 15:14:03,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:14:03,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:14:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-01-27 15:14:03,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632183908045977 [2024-01-27 15:14:03,669 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 64 flow. Second operand 3 states and 55 transitions. [2024-01-27 15:14:03,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 42 transitions, 183 flow [2024-01-27 15:14:03,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 169 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:14:03,675 INFO L231 Difference]: Finished difference. Result has 26 places, 28 transitions, 75 flow [2024-01-27 15:14:03,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=26, PETRI_TRANSITIONS=28} [2024-01-27 15:14:03,684 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -1 predicate places. [2024-01-27 15:14:03,684 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 28 transitions, 75 flow [2024-01-27 15:14:03,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 15:14:03,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:03,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:03,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:14:03,686 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:03,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:03,687 INFO L85 PathProgramCache]: Analyzing trace with hash 135500589, now seen corresponding path program 1 times [2024-01-27 15:14:03,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:03,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794201651] [2024-01-27 15:14:03,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:03,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:03,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:03,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794201651] [2024-01-27 15:14:03,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794201651] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:03,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:03,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:14:03,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121469079] [2024-01-27 15:14:03,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:03,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:14:03,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:03,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:14:03,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:14:03,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:03,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 28 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:03,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:03,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:03,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:04,025 INFO L124 PetriNetUnfolderBase]: 314/520 cut-off events. [2024-01-27 15:14:04,026 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-01-27 15:14:04,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1139 conditions, 520 events. 314/520 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2114 event pairs, 184 based on Foata normal form. 0/434 useless extension candidates. Maximal degree in co-relation 424. Up to 340 conditions per place. [2024-01-27 15:14:04,034 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 42 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2024-01-27 15:14:04,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 50 transitions, 224 flow [2024-01-27 15:14:04,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:04,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:04,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2024-01-27 15:14:04,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-01-27 15:14:04,037 INFO L175 Difference]: Start difference. First operand has 26 places, 28 transitions, 75 flow. Second operand 5 states and 70 transitions. [2024-01-27 15:14:04,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 50 transitions, 224 flow [2024-01-27 15:14:04,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 50 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:04,042 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 108 flow [2024-01-27 15:14:04,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2024-01-27 15:14:04,043 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2024-01-27 15:14:04,043 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 108 flow [2024-01-27 15:14:04,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:04,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:04,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:04,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:14:04,047 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:04,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:04,048 INFO L85 PathProgramCache]: Analyzing trace with hash -891589587, now seen corresponding path program 1 times [2024-01-27 15:14:04,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:04,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056323104] [2024-01-27 15:14:04,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:04,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:04,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:04,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056323104] [2024-01-27 15:14:04,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056323104] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:04,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:04,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:14:04,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389661041] [2024-01-27 15:14:04,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:04,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:14:04,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:04,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:14:04,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:14:04,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:04,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:04,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:04,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:04,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:04,301 INFO L124 PetriNetUnfolderBase]: 245/408 cut-off events. [2024-01-27 15:14:04,302 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-01-27 15:14:04,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 408 events. 245/408 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1530 event pairs, 139 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 769. Up to 340 conditions per place. [2024-01-27 15:14:04,304 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 24 selfloop transitions, 2 changer transitions 16/45 dead transitions. [2024-01-27 15:14:04,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 226 flow [2024-01-27 15:14:04,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:04,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-01-27 15:14:04,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45517241379310347 [2024-01-27 15:14:04,306 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 108 flow. Second operand 5 states and 66 transitions. [2024-01-27 15:14:04,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 226 flow [2024-01-27 15:14:04,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 45 transitions, 220 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:04,308 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 92 flow [2024-01-27 15:14:04,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2024-01-27 15:14:04,309 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2024-01-27 15:14:04,309 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 92 flow [2024-01-27 15:14:04,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:04,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:04,310 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 15:14:04,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:14:04,310 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:04,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:04,311 INFO L85 PathProgramCache]: Analyzing trace with hash -582652510, now seen corresponding path program 1 times [2024-01-27 15:14:04,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:04,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357068581] [2024-01-27 15:14:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:04,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:04,397 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 15:14:04,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:04,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357068581] [2024-01-27 15:14:04,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357068581] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:04,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:04,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:14:04,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892141749] [2024-01-27 15:14:04,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:04,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:14:04,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:04,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:14:04,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:14:04,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:04,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:04,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:04,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:04,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:04,540 INFO L124 PetriNetUnfolderBase]: 312/517 cut-off events. [2024-01-27 15:14:04,541 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2024-01-27 15:14:04,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 517 events. 312/517 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2132 event pairs, 184 based on Foata normal form. 18/526 useless extension candidates. Maximal degree in co-relation 1180. Up to 340 conditions per place. [2024-01-27 15:14:04,544 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 40 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-01-27 15:14:04,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 47 transitions, 232 flow [2024-01-27 15:14:04,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:04,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:04,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-01-27 15:14:04,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45517241379310347 [2024-01-27 15:14:04,549 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 92 flow. Second operand 5 states and 66 transitions. [2024-01-27 15:14:04,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 47 transitions, 232 flow [2024-01-27 15:14:04,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 47 transitions, 214 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-01-27 15:14:04,552 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 102 flow [2024-01-27 15:14:04,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-01-27 15:14:04,554 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2024-01-27 15:14:04,554 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 102 flow [2024-01-27 15:14:04,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:04,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:04,555 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 15:14:04,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:14:04,555 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:04,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:04,556 INFO L85 PathProgramCache]: Analyzing trace with hash -700286942, now seen corresponding path program 1 times [2024-01-27 15:14:04,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:04,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265557354] [2024-01-27 15:14:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:04,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:04,659 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 15:14:04,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:04,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265557354] [2024-01-27 15:14:04,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265557354] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:04,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:04,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:14:04,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696094572] [2024-01-27 15:14:04,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:04,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:14:04,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:04,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:14:04,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:14:04,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:04,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:04,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:04,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:04,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:04,772 INFO L124 PetriNetUnfolderBase]: 291/486 cut-off events. [2024-01-27 15:14:04,772 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-01-27 15:14:04,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 486 events. 291/486 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1899 event pairs, 123 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 1072. Up to 254 conditions per place. [2024-01-27 15:14:04,775 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 37 selfloop transitions, 5 changer transitions 12/57 dead transitions. [2024-01-27 15:14:04,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 276 flow [2024-01-27 15:14:04,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:04,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-01-27 15:14:04,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5310344827586206 [2024-01-27 15:14:04,778 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 102 flow. Second operand 5 states and 77 transitions. [2024-01-27 15:14:04,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 276 flow [2024-01-27 15:14:04,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 57 transitions, 270 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-01-27 15:14:04,783 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 113 flow [2024-01-27 15:14:04,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-01-27 15:14:04,786 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2024-01-27 15:14:04,786 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 113 flow [2024-01-27 15:14:04,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:04,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:04,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:04,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:14:04,787 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:04,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:04,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1671653826, now seen corresponding path program 1 times [2024-01-27 15:14:04,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:04,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160324977] [2024-01-27 15:14:04,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:04,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:04,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:04,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160324977] [2024-01-27 15:14:04,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160324977] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:04,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763371653] [2024-01-27 15:14:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:04,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:04,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:04,974 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 15:14:04,976 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 15:14:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:05,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:14:05,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:05,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:05,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763371653] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:05,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:14:05,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2024-01-27 15:14:05,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335116140] [2024-01-27 15:14:05,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:05,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:14:05,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:05,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:14:05,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:14:05,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:05,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 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 15:14:05,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:05,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:05,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:05,534 INFO L124 PetriNetUnfolderBase]: 277/464 cut-off events. [2024-01-27 15:14:05,534 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2024-01-27 15:14:05,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1145 conditions, 464 events. 277/464 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1760 event pairs, 99 based on Foata normal form. 15/473 useless extension candidates. Maximal degree in co-relation 1120. Up to 231 conditions per place. [2024-01-27 15:14:05,538 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 44 selfloop transitions, 8 changer transitions 0/55 dead transitions. [2024-01-27 15:14:05,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 55 transitions, 283 flow [2024-01-27 15:14:05,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:14:05,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:14:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-01-27 15:14:05,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236453201970443 [2024-01-27 15:14:05,540 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 113 flow. Second operand 7 states and 86 transitions. [2024-01-27 15:14:05,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 55 transitions, 283 flow [2024-01-27 15:14:05,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 268 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-01-27 15:14:05,545 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 134 flow [2024-01-27 15:14:05,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=134, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2024-01-27 15:14:05,548 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 12 predicate places. [2024-01-27 15:14:05,548 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 134 flow [2024-01-27 15:14:05,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 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 15:14:05,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:05,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:05,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-27 15:14:05,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-01-27 15:14:05,756 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:05,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:05,756 INFO L85 PathProgramCache]: Analyzing trace with hash 441212046, now seen corresponding path program 1 times [2024-01-27 15:14:05,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:05,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321025947] [2024-01-27 15:14:05,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:05,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:14:05,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:05,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321025947] [2024-01-27 15:14:05,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321025947] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:05,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840845746] [2024-01-27 15:14:05,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:05,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:05,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:05,909 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 15:14:05,926 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 15:14:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:06,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:14:06,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:14:06,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:14:06,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840845746] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:06,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:14:06,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2024-01-27 15:14:06,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006163235] [2024-01-27 15:14:06,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:06,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:14:06,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:06,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:14:06,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:14:06,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:06,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 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 15:14:06,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:06,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:06,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:06,378 INFO L124 PetriNetUnfolderBase]: 383/696 cut-off events. [2024-01-27 15:14:06,379 INFO L125 PetriNetUnfolderBase]: For 449/449 co-relation queries the response was YES. [2024-01-27 15:14:06,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1753 conditions, 696 events. 383/696 cut-off events. For 449/449 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3179 event pairs, 153 based on Foata normal form. 0/670 useless extension candidates. Maximal degree in co-relation 1726. Up to 243 conditions per place. [2024-01-27 15:14:06,383 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 53 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2024-01-27 15:14:06,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 64 transitions, 368 flow [2024-01-27 15:14:06,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:14:06,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:14:06,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-01-27 15:14:06,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433497536945813 [2024-01-27 15:14:06,384 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 134 flow. Second operand 7 states and 90 transitions. [2024-01-27 15:14:06,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 64 transitions, 368 flow [2024-01-27 15:14:06,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 346 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-01-27 15:14:06,387 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 152 flow [2024-01-27 15:14:06,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=152, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2024-01-27 15:14:06,387 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2024-01-27 15:14:06,388 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 152 flow [2024-01-27 15:14:06,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 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 15:14:06,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:06,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:06,405 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 15:14:06,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-01-27 15:14:06,604 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:06,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:06,605 INFO L85 PathProgramCache]: Analyzing trace with hash 272603849, now seen corresponding path program 1 times [2024-01-27 15:14:06,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:06,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790285890] [2024-01-27 15:14:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:06,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:07,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:07,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790285890] [2024-01-27 15:14:07,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790285890] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:07,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:07,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:14:07,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499981665] [2024-01-27 15:14:07,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:07,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:14:07,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:07,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:14:07,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:14:07,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:07,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 152 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:14:07,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:07,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:07,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:07,206 INFO L124 PetriNetUnfolderBase]: 396/717 cut-off events. [2024-01-27 15:14:07,206 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-01-27 15:14:07,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 717 events. 396/717 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3238 event pairs, 117 based on Foata normal form. 6/720 useless extension candidates. Maximal degree in co-relation 1882. Up to 589 conditions per place. [2024-01-27 15:14:07,210 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 42 selfloop transitions, 11 changer transitions 7/63 dead transitions. [2024-01-27 15:14:07,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 63 transitions, 359 flow [2024-01-27 15:14:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:14:07,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:14:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-01-27 15:14:07,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433497536945813 [2024-01-27 15:14:07,212 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 152 flow. Second operand 7 states and 90 transitions. [2024-01-27 15:14:07,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 63 transitions, 359 flow [2024-01-27 15:14:07,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 353 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-27 15:14:07,215 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 230 flow [2024-01-27 15:14:07,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=230, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2024-01-27 15:14:07,216 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2024-01-27 15:14:07,216 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 230 flow [2024-01-27 15:14:07,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:14:07,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:07,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:07,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 15:14:07,226 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:07,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:07,226 INFO L85 PathProgramCache]: Analyzing trace with hash -503606699, now seen corresponding path program 1 times [2024-01-27 15:14:07,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:07,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178713915] [2024-01-27 15:14:07,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:07,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:07,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:07,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178713915] [2024-01-27 15:14:07,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178713915] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:07,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:07,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:14:07,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609358732] [2024-01-27 15:14:07,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:07,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:14:07,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:07,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:14:07,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:14:07,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:07,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 230 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:14:07,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:07,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:07,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:07,848 INFO L124 PetriNetUnfolderBase]: 392/711 cut-off events. [2024-01-27 15:14:07,848 INFO L125 PetriNetUnfolderBase]: For 756/764 co-relation queries the response was YES. [2024-01-27 15:14:07,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2214 conditions, 711 events. 392/711 cut-off events. For 756/764 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3129 event pairs, 135 based on Foata normal form. 5/714 useless extension candidates. Maximal degree in co-relation 2183. Up to 589 conditions per place. [2024-01-27 15:14:07,852 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 43 selfloop transitions, 13 changer transitions 9/68 dead transitions. [2024-01-27 15:14:07,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 68 transitions, 469 flow [2024-01-27 15:14:07,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:14:07,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:14:07,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-01-27 15:14:07,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433497536945813 [2024-01-27 15:14:07,854 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 230 flow. Second operand 7 states and 90 transitions. [2024-01-27 15:14:07,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 68 transitions, 469 flow [2024-01-27 15:14:07,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 439 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-01-27 15:14:07,859 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 288 flow [2024-01-27 15:14:07,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=288, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2024-01-27 15:14:07,861 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 28 predicate places. [2024-01-27 15:14:07,861 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 288 flow [2024-01-27 15:14:07,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:14:07,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:07,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:07,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-27 15:14:07,863 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:07,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:07,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1650329317, now seen corresponding path program 2 times [2024-01-27 15:14:07,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:07,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324669455] [2024-01-27 15:14:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:07,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:08,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:08,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324669455] [2024-01-27 15:14:08,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324669455] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:08,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552217153] [2024-01-27 15:14:08,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:14:08,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:08,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:08,224 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 15:14:08,236 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 15:14:08,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:14:08,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:08,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:14:08,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:08,376 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 15:14:08,411 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 15:14:08,538 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-27 15:14:08,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-01-27 15:14:08,548 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 15:14:08,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:08,836 INFO L349 Elim1Store]: treesize reduction 40, result has 54.0 percent of original size [2024-01-27 15:14:08,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 496 treesize of output 374 [2024-01-27 15:14:08,860 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:14:08,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 303 treesize of output 283 [2024-01-27 15:14:09,030 INFO L349 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2024-01-27 15:14:09,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 78 [2024-01-27 15:14:09,168 INFO L349 Elim1Store]: treesize reduction 13, result has 78.7 percent of original size [2024-01-27 15:14:09,168 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 173 treesize of output 176 [2024-01-27 15:14:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:09,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552217153] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:09,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:09,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 18 [2024-01-27 15:14:09,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179808517] [2024-01-27 15:14:09,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:09,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:14:09,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:09,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:14:09,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:14:09,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:09,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 288 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 15:14:09,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:09,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:09,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:09,765 INFO L124 PetriNetUnfolderBase]: 406/737 cut-off events. [2024-01-27 15:14:09,765 INFO L125 PetriNetUnfolderBase]: For 939/939 co-relation queries the response was YES. [2024-01-27 15:14:09,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2393 conditions, 737 events. 406/737 cut-off events. For 939/939 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3275 event pairs, 57 based on Foata normal form. 16/751 useless extension candidates. Maximal degree in co-relation 2360. Up to 429 conditions per place. [2024-01-27 15:14:09,770 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 56 selfloop transitions, 17 changer transitions 3/79 dead transitions. [2024-01-27 15:14:09,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 561 flow [2024-01-27 15:14:09,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:14:09,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:14:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-01-27 15:14:09,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44061302681992337 [2024-01-27 15:14:09,771 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 288 flow. Second operand 9 states and 115 transitions. [2024-01-27 15:14:09,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 561 flow [2024-01-27 15:14:09,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 547 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-27 15:14:09,777 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 320 flow [2024-01-27 15:14:09,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=320, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2024-01-27 15:14:09,778 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 33 predicate places. [2024-01-27 15:14:09,778 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 320 flow [2024-01-27 15:14:09,778 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 15:14:09,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:09,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:09,796 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 15:14:09,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:09,993 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:09,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:09,993 INFO L85 PathProgramCache]: Analyzing trace with hash -119994201, now seen corresponding path program 2 times [2024-01-27 15:14:09,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:09,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659882180] [2024-01-27 15:14:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:09,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:10,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:10,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659882180] [2024-01-27 15:14:10,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659882180] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:10,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:10,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:14:10,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860322263] [2024-01-27 15:14:10,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:10,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:14:10,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:10,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:14:10,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:14:10,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:10,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 320 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:14:10,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:10,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:10,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:10,567 INFO L124 PetriNetUnfolderBase]: 412/748 cut-off events. [2024-01-27 15:14:10,568 INFO L125 PetriNetUnfolderBase]: For 1350/1350 co-relation queries the response was YES. [2024-01-27 15:14:10,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2542 conditions, 748 events. 412/748 cut-off events. For 1350/1350 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3356 event pairs, 115 based on Foata normal form. 6/753 useless extension candidates. Maximal degree in co-relation 2507. Up to 627 conditions per place. [2024-01-27 15:14:10,573 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 43 selfloop transitions, 12 changer transitions 13/71 dead transitions. [2024-01-27 15:14:10,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 71 transitions, 547 flow [2024-01-27 15:14:10,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:14:10,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:14:10,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-01-27 15:14:10,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45320197044334976 [2024-01-27 15:14:10,574 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 320 flow. Second operand 7 states and 92 transitions. [2024-01-27 15:14:10,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 71 transitions, 547 flow [2024-01-27 15:14:10,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 498 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-01-27 15:14:10,579 INFO L231 Difference]: Finished difference. Result has 60 places, 47 transitions, 315 flow [2024-01-27 15:14:10,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=315, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2024-01-27 15:14:10,580 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 33 predicate places. [2024-01-27 15:14:10,580 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 315 flow [2024-01-27 15:14:10,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:14:10,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:10,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:10,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-27 15:14:10,580 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:10,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:10,581 INFO L85 PathProgramCache]: Analyzing trace with hash -2065879551, now seen corresponding path program 3 times [2024-01-27 15:14:10,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:10,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908303909] [2024-01-27 15:14:10,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:10,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:10,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:10,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908303909] [2024-01-27 15:14:10,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908303909] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:10,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:10,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:14:10,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980442644] [2024-01-27 15:14:10,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:10,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:14:10,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:10,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:14:10,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:14:10,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:10,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 315 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:14:10,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:10,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:10,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:11,109 INFO L124 PetriNetUnfolderBase]: 394/725 cut-off events. [2024-01-27 15:14:11,109 INFO L125 PetriNetUnfolderBase]: For 1082/1098 co-relation queries the response was YES. [2024-01-27 15:14:11,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2347 conditions, 725 events. 394/725 cut-off events. For 1082/1098 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3217 event pairs, 165 based on Foata normal form. 10/733 useless extension candidates. Maximal degree in co-relation 2313. Up to 621 conditions per place. [2024-01-27 15:14:11,114 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 35 selfloop transitions, 14 changer transitions 12/64 dead transitions. [2024-01-27 15:14:11,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 496 flow [2024-01-27 15:14:11,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:14:11,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:14:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-01-27 15:14:11,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236453201970443 [2024-01-27 15:14:11,116 INFO L175 Difference]: Start difference. First operand has 60 places, 47 transitions, 315 flow. Second operand 7 states and 86 transitions. [2024-01-27 15:14:11,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 496 flow [2024-01-27 15:14:11,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 464 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-01-27 15:14:11,119 INFO L231 Difference]: Finished difference. Result has 61 places, 46 transitions, 317 flow [2024-01-27 15:14:11,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=317, PETRI_PLACES=61, PETRI_TRANSITIONS=46} [2024-01-27 15:14:11,120 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 34 predicate places. [2024-01-27 15:14:11,120 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 46 transitions, 317 flow [2024-01-27 15:14:11,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:14:11,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:11,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:11,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-27 15:14:11,121 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:11,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:11,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1347215579, now seen corresponding path program 3 times [2024-01-27 15:14:11,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:11,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363593055] [2024-01-27 15:14:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:11,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:11,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:11,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363593055] [2024-01-27 15:14:11,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363593055] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:11,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:11,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:14:11,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587474809] [2024-01-27 15:14:11,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:11,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:14:11,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:11,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:14:11,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:14:11,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:11,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 46 transitions, 317 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:14:11,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:11,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:11,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:11,621 INFO L124 PetriNetUnfolderBase]: 368/669 cut-off events. [2024-01-27 15:14:11,621 INFO L125 PetriNetUnfolderBase]: For 931/931 co-relation queries the response was YES. [2024-01-27 15:14:11,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2188 conditions, 669 events. 368/669 cut-off events. For 931/931 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2847 event pairs, 157 based on Foata normal form. 4/672 useless extension candidates. Maximal degree in co-relation 2154. Up to 621 conditions per place. [2024-01-27 15:14:11,625 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 38 selfloop transitions, 12 changer transitions 3/56 dead transitions. [2024-01-27 15:14:11,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 56 transitions, 445 flow [2024-01-27 15:14:11,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:14:11,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:14:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-01-27 15:14:11,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891625615763547 [2024-01-27 15:14:11,626 INFO L175 Difference]: Start difference. First operand has 61 places, 46 transitions, 317 flow. Second operand 7 states and 79 transitions. [2024-01-27 15:14:11,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 56 transitions, 445 flow [2024-01-27 15:14:11,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 56 transitions, 406 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-01-27 15:14:11,630 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 292 flow [2024-01-27 15:14:11,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=292, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2024-01-27 15:14:11,631 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 32 predicate places. [2024-01-27 15:14:11,631 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 292 flow [2024-01-27 15:14:11,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:14:11,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:11,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:11,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-27 15:14:11,631 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:11,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:11,632 INFO L85 PathProgramCache]: Analyzing trace with hash -54678059, now seen corresponding path program 4 times [2024-01-27 15:14:11,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:11,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023107751] [2024-01-27 15:14:11,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:11,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:11,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:11,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023107751] [2024-01-27 15:14:11,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023107751] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:11,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588125979] [2024-01-27 15:14:11,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:14:11,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:11,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:11,928 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 15:14:11,948 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 15:14:12,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:14:12,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:12,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:14:12,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:12,065 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 15:14:12,140 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:14:12,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2024-01-27 15:14:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:14:12,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:12,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:14:12,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 154 [2024-01-27 15:14:12,328 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:14:12,329 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 46 treesize of output 37 [2024-01-27 15:14:12,399 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:14:12,400 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 166 treesize of output 169 [2024-01-27 15:14:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:14:12,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588125979] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:12,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:12,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-01-27 15:14:12,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475252591] [2024-01-27 15:14:12,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:12,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:14:12,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:12,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:14:12,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:14:12,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:12,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 292 flow. Second operand has 18 states, 18 states have (on average 7.5) internal successors, (135), 18 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 15:14:12,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:12,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:12,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:12,981 INFO L124 PetriNetUnfolderBase]: 460/830 cut-off events. [2024-01-27 15:14:12,981 INFO L125 PetriNetUnfolderBase]: For 1133/1133 co-relation queries the response was YES. [2024-01-27 15:14:12,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2702 conditions, 830 events. 460/830 cut-off events. For 1133/1133 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3816 event pairs, 95 based on Foata normal form. 24/853 useless extension candidates. Maximal degree in co-relation 2670. Up to 661 conditions per place. [2024-01-27 15:14:12,987 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 64 selfloop transitions, 23 changer transitions 0/90 dead transitions. [2024-01-27 15:14:12,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 90 transitions, 625 flow [2024-01-27 15:14:12,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:14:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:14:12,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-01-27 15:14:12,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051724137931034 [2024-01-27 15:14:12,988 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 292 flow. Second operand 12 states and 141 transitions. [2024-01-27 15:14:12,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 90 transitions, 625 flow [2024-01-27 15:14:12,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 601 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-01-27 15:14:12,993 INFO L231 Difference]: Finished difference. Result has 68 places, 54 transitions, 398 flow [2024-01-27 15:14:12,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=398, PETRI_PLACES=68, PETRI_TRANSITIONS=54} [2024-01-27 15:14:12,994 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 41 predicate places. [2024-01-27 15:14:12,994 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 54 transitions, 398 flow [2024-01-27 15:14:12,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.5) internal successors, (135), 18 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 15:14:12,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:12,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:13,012 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 15:14:13,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:13,208 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:13,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:13,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1966259215, now seen corresponding path program 4 times [2024-01-27 15:14:13,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:13,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079465599] [2024-01-27 15:14:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:13,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:13,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:13,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079465599] [2024-01-27 15:14:13,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079465599] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:13,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:13,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:14:13,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238032036] [2024-01-27 15:14:13,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:13,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:14:13,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:13,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:14:13,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:14:13,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:13,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 54 transitions, 398 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:14:13,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:13,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:13,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:13,658 INFO L124 PetriNetUnfolderBase]: 478/860 cut-off events. [2024-01-27 15:14:13,658 INFO L125 PetriNetUnfolderBase]: For 1901/1901 co-relation queries the response was YES. [2024-01-27 15:14:13,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3121 conditions, 860 events. 478/860 cut-off events. For 1901/1901 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3923 event pairs, 167 based on Foata normal form. 12/871 useless extension candidates. Maximal degree in co-relation 3083. Up to 797 conditions per place. [2024-01-27 15:14:13,664 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 53 selfloop transitions, 13 changer transitions 0/69 dead transitions. [2024-01-27 15:14:13,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 69 transitions, 586 flow [2024-01-27 15:14:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:14:13,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:14:13,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-01-27 15:14:13,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088669950738916 [2024-01-27 15:14:13,665 INFO L175 Difference]: Start difference. First operand has 68 places, 54 transitions, 398 flow. Second operand 7 states and 83 transitions. [2024-01-27 15:14:13,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 69 transitions, 586 flow [2024-01-27 15:14:13,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 556 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-01-27 15:14:13,671 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 408 flow [2024-01-27 15:14:13,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=408, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2024-01-27 15:14:13,671 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 42 predicate places. [2024-01-27 15:14:13,671 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 408 flow [2024-01-27 15:14:13,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:14:13,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:13,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:13,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-01-27 15:14:13,672 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:13,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:13,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1930137977, now seen corresponding path program 5 times [2024-01-27 15:14:13,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:13,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505979457] [2024-01-27 15:14:13,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:13,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:13,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:13,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505979457] [2024-01-27 15:14:13,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505979457] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:13,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937780199] [2024-01-27 15:14:13,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:14:13,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:13,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:13,930 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 15:14:13,954 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 15:14:14,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:14:14,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:14,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 15:14:14,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:14,132 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:14:14,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2024-01-27 15:14:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:14,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:14,234 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-27 15:14:14,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-27 15:14:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:14,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937780199] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:14,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:14:14,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 14 [2024-01-27 15:14:14,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119063485] [2024-01-27 15:14:14,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:14,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:14:14,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:14,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:14:14,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:14:14,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:14,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 408 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 15:14:14,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:14,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:14,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:14,447 INFO L124 PetriNetUnfolderBase]: 454/837 cut-off events. [2024-01-27 15:14:14,447 INFO L125 PetriNetUnfolderBase]: For 2001/2010 co-relation queries the response was YES. [2024-01-27 15:14:14,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3013 conditions, 837 events. 454/837 cut-off events. For 2001/2010 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3903 event pairs, 125 based on Foata normal form. 30/865 useless extension candidates. Maximal degree in co-relation 2975. Up to 658 conditions per place. [2024-01-27 15:14:14,453 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 57 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2024-01-27 15:14:14,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 73 transitions, 611 flow [2024-01-27 15:14:14,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:14:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:14:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 81 transitions. [2024-01-27 15:14:14,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46551724137931033 [2024-01-27 15:14:14,455 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 408 flow. Second operand 6 states and 81 transitions. [2024-01-27 15:14:14,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 73 transitions, 611 flow [2024-01-27 15:14:14,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 73 transitions, 587 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-01-27 15:14:14,462 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 416 flow [2024-01-27 15:14:14,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=416, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2024-01-27 15:14:14,462 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 43 predicate places. [2024-01-27 15:14:14,463 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 416 flow [2024-01-27 15:14:14,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 15:14:14,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:14,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:14,482 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 15:14:14,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:14:14,678 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:14,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:14,678 INFO L85 PathProgramCache]: Analyzing trace with hash -795919207, now seen corresponding path program 5 times [2024-01-27 15:14:14,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:14,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717310185] [2024-01-27 15:14:14,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:14,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:14,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:14,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717310185] [2024-01-27 15:14:14,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717310185] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:14,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:14,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:14:14,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534967885] [2024-01-27 15:14:14,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:14,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:14:14,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:14,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:14:14,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:14:14,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:14,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 416 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:14:14,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:14,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:14,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:15,188 INFO L124 PetriNetUnfolderBase]: 472/867 cut-off events. [2024-01-27 15:14:15,188 INFO L125 PetriNetUnfolderBase]: For 2171/2180 co-relation queries the response was YES. [2024-01-27 15:14:15,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3205 conditions, 867 events. 472/867 cut-off events. For 2171/2180 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4084 event pairs, 159 based on Foata normal form. 18/883 useless extension candidates. Maximal degree in co-relation 3166. Up to 803 conditions per place. [2024-01-27 15:14:15,194 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 51 selfloop transitions, 14 changer transitions 0/68 dead transitions. [2024-01-27 15:14:15,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 68 transitions, 601 flow [2024-01-27 15:14:15,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:14:15,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:14:15,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-01-27 15:14:15,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39901477832512317 [2024-01-27 15:14:15,196 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 416 flow. Second operand 7 states and 81 transitions. [2024-01-27 15:14:15,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 68 transitions, 601 flow [2024-01-27 15:14:15,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 68 transitions, 579 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:14:15,203 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 438 flow [2024-01-27 15:14:15,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=438, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2024-01-27 15:14:15,204 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 46 predicate places. [2024-01-27 15:14:15,204 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 438 flow [2024-01-27 15:14:15,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:14:15,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:15,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:15,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-01-27 15:14:15,205 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:15,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:15,205 INFO L85 PathProgramCache]: Analyzing trace with hash -545123663, now seen corresponding path program 6 times [2024-01-27 15:14:15,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:15,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749978464] [2024-01-27 15:14:15,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:15,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:15,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:15,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:15,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749978464] [2024-01-27 15:14:15,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749978464] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:15,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:15,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:14:15,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559326164] [2024-01-27 15:14:15,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:15,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:14:15,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:15,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:14:15,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:14:15,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:15,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 438 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:14:15,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:15,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:15,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:15,694 INFO L124 PetriNetUnfolderBase]: 426/764 cut-off events. [2024-01-27 15:14:15,695 INFO L125 PetriNetUnfolderBase]: For 2266/2275 co-relation queries the response was YES. [2024-01-27 15:14:15,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2970 conditions, 764 events. 426/764 cut-off events. For 2266/2275 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3400 event pairs, 135 based on Foata normal form. 10/772 useless extension candidates. Maximal degree in co-relation 2930. Up to 723 conditions per place. [2024-01-27 15:14:15,701 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 45 selfloop transitions, 11 changer transitions 3/62 dead transitions. [2024-01-27 15:14:15,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 62 transitions, 554 flow [2024-01-27 15:14:15,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:14:15,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:14:15,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 75 transitions. [2024-01-27 15:14:15,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3694581280788177 [2024-01-27 15:14:15,702 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 438 flow. Second operand 7 states and 75 transitions. [2024-01-27 15:14:15,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 62 transitions, 554 flow [2024-01-27 15:14:15,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 62 transitions, 528 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-01-27 15:14:15,709 INFO L231 Difference]: Finished difference. Result has 74 places, 54 transitions, 412 flow [2024-01-27 15:14:15,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=412, PETRI_PLACES=74, PETRI_TRANSITIONS=54} [2024-01-27 15:14:15,710 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 47 predicate places. [2024-01-27 15:14:15,710 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 54 transitions, 412 flow [2024-01-27 15:14:15,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:14:15,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:15,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:15,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-01-27 15:14:15,710 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:15,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:15,711 INFO L85 PathProgramCache]: Analyzing trace with hash -779153657, now seen corresponding path program 6 times [2024-01-27 15:14:15,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:15,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980226527] [2024-01-27 15:14:15,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:15,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:15,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:15,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980226527] [2024-01-27 15:14:15,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980226527] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:15,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:15,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:14:15,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323178215] [2024-01-27 15:14:15,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:15,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:14:15,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:15,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:14:15,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:14:15,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:15,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 54 transitions, 412 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:14:15,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:15,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:15,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:16,194 INFO L124 PetriNetUnfolderBase]: 376/668 cut-off events. [2024-01-27 15:14:16,195 INFO L125 PetriNetUnfolderBase]: For 1871/1880 co-relation queries the response was YES. [2024-01-27 15:14:16,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2644 conditions, 668 events. 376/668 cut-off events. For 1871/1880 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2794 event pairs, 95 based on Foata normal form. 18/684 useless extension candidates. Maximal degree in co-relation 2604. Up to 545 conditions per place. [2024-01-27 15:14:16,200 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 52 selfloop transitions, 15 changer transitions 0/70 dead transitions. [2024-01-27 15:14:16,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 70 transitions, 619 flow [2024-01-27 15:14:16,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:14:16,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:14:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-01-27 15:14:16,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879310344827586 [2024-01-27 15:14:16,202 INFO L175 Difference]: Start difference. First operand has 74 places, 54 transitions, 412 flow. Second operand 8 states and 90 transitions. [2024-01-27 15:14:16,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 70 transitions, 619 flow [2024-01-27 15:14:16,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 70 transitions, 597 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-01-27 15:14:16,212 INFO L231 Difference]: Finished difference. Result has 75 places, 54 transitions, 424 flow [2024-01-27 15:14:16,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=424, PETRI_PLACES=75, PETRI_TRANSITIONS=54} [2024-01-27 15:14:16,213 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 48 predicate places. [2024-01-27 15:14:16,213 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 54 transitions, 424 flow [2024-01-27 15:14:16,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:14:16,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:16,214 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 15:14:16,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-01-27 15:14:16,214 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:16,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:16,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1952957372, now seen corresponding path program 1 times [2024-01-27 15:14:16,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:16,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192649945] [2024-01-27 15:14:16,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:16,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:16,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:16,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192649945] [2024-01-27 15:14:16,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192649945] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:16,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668626761] [2024-01-27 15:14:16,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:16,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:16,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:16,294 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 15:14:16,307 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 15:14:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:16,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:14:16,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:16,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:16,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668626761] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:16,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:16,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2024-01-27 15:14:16,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625414908] [2024-01-27 15:14:16,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:16,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:14:16,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:16,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:14:16,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:14:16,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:16,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 54 transitions, 424 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 15:14:16,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:16,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:16,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:16,705 INFO L124 PetriNetUnfolderBase]: 822/1460 cut-off events. [2024-01-27 15:14:16,705 INFO L125 PetriNetUnfolderBase]: For 4115/4124 co-relation queries the response was YES. [2024-01-27 15:14:16,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5399 conditions, 1460 events. 822/1460 cut-off events. For 4115/4124 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7429 event pairs, 108 based on Foata normal form. 14/1472 useless extension candidates. Maximal degree in co-relation 5357. Up to 593 conditions per place. [2024-01-27 15:14:16,717 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 88 selfloop transitions, 20 changer transitions 2/113 dead transitions. [2024-01-27 15:14:16,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 113 transitions, 946 flow [2024-01-27 15:14:16,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:14:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:14:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-01-27 15:14:16,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6009852216748769 [2024-01-27 15:14:16,718 INFO L175 Difference]: Start difference. First operand has 75 places, 54 transitions, 424 flow. Second operand 7 states and 122 transitions. [2024-01-27 15:14:16,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 113 transitions, 946 flow [2024-01-27 15:14:16,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 113 transitions, 885 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-01-27 15:14:16,731 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 518 flow [2024-01-27 15:14:16,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=518, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2024-01-27 15:14:16,732 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 49 predicate places. [2024-01-27 15:14:16,732 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 518 flow [2024-01-27 15:14:16,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 15:14:16,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:16,732 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 15:14:16,752 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 15:14:16,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:16,950 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:16,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:16,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1164924930, now seen corresponding path program 2 times [2024-01-27 15:14:16,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:16,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013790157] [2024-01-27 15:14:16,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:16,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:17,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:17,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013790157] [2024-01-27 15:14:17,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013790157] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:17,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450165352] [2024-01-27 15:14:17,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:14:17,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:17,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:17,030 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 15:14:17,049 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 15:14:17,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:14:17,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:17,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:14:17,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:17,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:14:17,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450165352] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:17,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:17,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2024-01-27 15:14:17,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768048505] [2024-01-27 15:14:17,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:17,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:14:17,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:17,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:14:17,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:14:17,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:17,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 64 transitions, 518 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 15:14:17,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:17,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:17,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:17,548 INFO L124 PetriNetUnfolderBase]: 1290/2284 cut-off events. [2024-01-27 15:14:17,548 INFO L125 PetriNetUnfolderBase]: For 6381/6390 co-relation queries the response was YES. [2024-01-27 15:14:17,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8425 conditions, 2284 events. 1290/2284 cut-off events. For 6381/6390 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12877 event pairs, 364 based on Foata normal form. 14/2296 useless extension candidates. Maximal degree in co-relation 8383. Up to 1465 conditions per place. [2024-01-27 15:14:17,573 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 98 selfloop transitions, 17 changer transitions 2/120 dead transitions. [2024-01-27 15:14:17,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 120 transitions, 1052 flow [2024-01-27 15:14:17,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:14:17,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:14:17,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-01-27 15:14:17,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5812807881773399 [2024-01-27 15:14:17,574 INFO L175 Difference]: Start difference. First operand has 76 places, 64 transitions, 518 flow. Second operand 7 states and 118 transitions. [2024-01-27 15:14:17,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 120 transitions, 1052 flow [2024-01-27 15:14:17,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 120 transitions, 1023 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:17,600 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 634 flow [2024-01-27 15:14:17,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=634, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2024-01-27 15:14:17,600 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 57 predicate places. [2024-01-27 15:14:17,601 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 634 flow [2024-01-27 15:14:17,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 15:14:17,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:17,601 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:17,619 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 15:14:17,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:17,817 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:17,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:17,817 INFO L85 PathProgramCache]: Analyzing trace with hash -842612188, now seen corresponding path program 3 times [2024-01-27 15:14:17,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:17,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298395627] [2024-01-27 15:14:17,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:17,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:17,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:17,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298395627] [2024-01-27 15:14:17,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298395627] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:17,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906495301] [2024-01-27 15:14:17,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:14:17,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:17,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:17,892 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 15:14:17,912 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 15:14:18,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:14:18,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:18,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:14:18,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:18,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:18,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906495301] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:18,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:18,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2024-01-27 15:14:18,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829602891] [2024-01-27 15:14:18,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:18,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:14:18,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:18,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:14:18,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:14:18,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:18,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 634 flow. Second operand has 15 states, 15 states have (on average 8.0) internal successors, (120), 15 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 15:14:18,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:18,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:18,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:18,799 INFO L124 PetriNetUnfolderBase]: 2551/4630 cut-off events. [2024-01-27 15:14:18,799 INFO L125 PetriNetUnfolderBase]: For 14188/14197 co-relation queries the response was YES. [2024-01-27 15:14:18,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17602 conditions, 4630 events. 2551/4630 cut-off events. For 14188/14197 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 30982 event pairs, 1562 based on Foata normal form. 180/4808 useless extension candidates. Maximal degree in co-relation 16567. Up to 2267 conditions per place. [2024-01-27 15:14:18,829 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 185 selfloop transitions, 39 changer transitions 0/227 dead transitions. [2024-01-27 15:14:18,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 227 transitions, 2344 flow [2024-01-27 15:14:18,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:14:18,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:14:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 192 transitions. [2024-01-27 15:14:18,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-01-27 15:14:18,831 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 634 flow. Second operand 16 states and 192 transitions. [2024-01-27 15:14:18,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 227 transitions, 2344 flow [2024-01-27 15:14:18,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 227 transitions, 2231 flow, removed 44 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:18,899 INFO L231 Difference]: Finished difference. Result has 104 places, 109 transitions, 1136 flow [2024-01-27 15:14:18,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1136, PETRI_PLACES=104, PETRI_TRANSITIONS=109} [2024-01-27 15:14:18,900 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 77 predicate places. [2024-01-27 15:14:18,900 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 109 transitions, 1136 flow [2024-01-27 15:14:18,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.0) internal successors, (120), 15 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 15:14:18,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:18,900 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:18,917 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 15:14:19,115 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,SelfDestructingSolverStorable21 [2024-01-27 15:14:19,115 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:19,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:19,116 INFO L85 PathProgramCache]: Analyzing trace with hash -712148884, now seen corresponding path program 4 times [2024-01-27 15:14:19,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:19,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469053748] [2024-01-27 15:14:19,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:19,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:19,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:19,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469053748] [2024-01-27 15:14:19,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469053748] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:19,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032201912] [2024-01-27 15:14:19,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:14:19,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:19,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:19,211 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 15:14:19,213 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 15:14:19,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:14:19,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:19,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:14:19,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:14:19,458 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:14:19,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032201912] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:19,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:14:19,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 13 [2024-01-27 15:14:19,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141288764] [2024-01-27 15:14:19,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:19,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:14:19,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:19,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:14:19,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:14:19,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:19,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 109 transitions, 1136 flow. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:19,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:19,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:19,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:20,251 INFO L124 PetriNetUnfolderBase]: 3157/5888 cut-off events. [2024-01-27 15:14:20,252 INFO L125 PetriNetUnfolderBase]: For 18465/18465 co-relation queries the response was YES. [2024-01-27 15:14:20,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21707 conditions, 5888 events. 3157/5888 cut-off events. For 18465/18465 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 42818 event pairs, 338 based on Foata normal form. 8/5892 useless extension candidates. Maximal degree in co-relation 20454. Up to 1828 conditions per place. [2024-01-27 15:14:20,285 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 110 selfloop transitions, 69 changer transitions 7/189 dead transitions. [2024-01-27 15:14:20,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 189 transitions, 1985 flow [2024-01-27 15:14:20,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:14:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:14:20,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-01-27 15:14:20,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44482758620689655 [2024-01-27 15:14:20,288 INFO L175 Difference]: Start difference. First operand has 104 places, 109 transitions, 1136 flow. Second operand 10 states and 129 transitions. [2024-01-27 15:14:20,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 189 transitions, 1985 flow [2024-01-27 15:14:20,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 189 transitions, 1960 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-01-27 15:14:20,362 INFO L231 Difference]: Finished difference. Result has 114 places, 122 transitions, 1406 flow [2024-01-27 15:14:20,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1406, PETRI_PLACES=114, PETRI_TRANSITIONS=122} [2024-01-27 15:14:20,364 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 87 predicate places. [2024-01-27 15:14:20,364 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 122 transitions, 1406 flow [2024-01-27 15:14:20,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:20,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:20,364 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:20,379 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 15:14:20,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:20,580 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:20,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:20,580 INFO L85 PathProgramCache]: Analyzing trace with hash 926264904, now seen corresponding path program 5 times [2024-01-27 15:14:20,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:20,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040215056] [2024-01-27 15:14:20,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:20,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:20,673 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 15:14:20,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:20,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040215056] [2024-01-27 15:14:20,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040215056] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:20,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541537279] [2024-01-27 15:14:20,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:14:20,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:20,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:20,675 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 15:14:20,698 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 15:14:20,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:14:20,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:20,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:14:20,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:20,855 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 15:14:20,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:20,920 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 15:14:20,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541537279] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:20,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:20,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2024-01-27 15:14:20,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776903579] [2024-01-27 15:14:20,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:20,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:14:20,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:20,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:14:20,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:14:20,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:20,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 122 transitions, 1406 flow. Second operand has 15 states, 15 states have (on average 8.4) internal successors, (126), 15 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 15:14:20,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:20,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:20,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:21,597 INFO L124 PetriNetUnfolderBase]: 1849/3449 cut-off events. [2024-01-27 15:14:21,597 INFO L125 PetriNetUnfolderBase]: For 15012/15018 co-relation queries the response was YES. [2024-01-27 15:14:21,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14815 conditions, 3449 events. 1849/3449 cut-off events. For 15012/15018 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 21779 event pairs, 748 based on Foata normal form. 91/3538 useless extension candidates. Maximal degree in co-relation 14653. Up to 2301 conditions per place. [2024-01-27 15:14:21,624 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 74 selfloop transitions, 20 changer transitions 115/212 dead transitions. [2024-01-27 15:14:21,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 212 transitions, 2429 flow [2024-01-27 15:14:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:14:21,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:14:21,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 188 transitions. [2024-01-27 15:14:21,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432183908045977 [2024-01-27 15:14:21,625 INFO L175 Difference]: Start difference. First operand has 114 places, 122 transitions, 1406 flow. Second operand 15 states and 188 transitions. [2024-01-27 15:14:21,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 212 transitions, 2429 flow [2024-01-27 15:14:21,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 212 transitions, 2218 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-01-27 15:14:21,687 INFO L231 Difference]: Finished difference. Result has 123 places, 89 transitions, 869 flow [2024-01-27 15:14:21,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=869, PETRI_PLACES=123, PETRI_TRANSITIONS=89} [2024-01-27 15:14:21,688 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 96 predicate places. [2024-01-27 15:14:21,688 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 89 transitions, 869 flow [2024-01-27 15:14:21,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.4) internal successors, (126), 15 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 15:14:21,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:21,688 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] [2024-01-27 15:14:21,704 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 15:14:21,902 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,SelfDestructingSolverStorable23 [2024-01-27 15:14:21,903 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:21,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:21,903 INFO L85 PathProgramCache]: Analyzing trace with hash -755228349, now seen corresponding path program 6 times [2024-01-27 15:14:21,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:21,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136096278] [2024-01-27 15:14:21,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:21,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:14:22,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:22,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136096278] [2024-01-27 15:14:22,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136096278] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:22,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730606023] [2024-01-27 15:14:22,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:14:22,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:22,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:22,142 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 15:14:22,162 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 15:14:22,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:14:22,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:22,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:14:22,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:22,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:22,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730606023] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:22,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:22,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 16 [2024-01-27 15:14:22,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676073718] [2024-01-27 15:14:22,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:22,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:14:22,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:22,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:14:22,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:14:22,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:22,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 89 transitions, 869 flow. Second operand has 17 states, 17 states have (on average 8.647058823529411) internal successors, (147), 17 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 15:14:22,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:22,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:22,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:23,386 INFO L124 PetriNetUnfolderBase]: 2155/3979 cut-off events. [2024-01-27 15:14:23,386 INFO L125 PetriNetUnfolderBase]: For 19445/19451 co-relation queries the response was YES. [2024-01-27 15:14:23,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17058 conditions, 3979 events. 2155/3979 cut-off events. For 19445/19451 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 25745 event pairs, 272 based on Foata normal form. 180/4157 useless extension candidates. Maximal degree in co-relation 17012. Up to 620 conditions per place. [2024-01-27 15:14:23,418 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 165 selfloop transitions, 83 changer transitions 0/251 dead transitions. [2024-01-27 15:14:23,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 251 transitions, 2601 flow [2024-01-27 15:14:23,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:14:23,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:14:23,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 267 transitions. [2024-01-27 15:14:23,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603448275862069 [2024-01-27 15:14:23,420 INFO L175 Difference]: Start difference. First operand has 123 places, 89 transitions, 869 flow. Second operand 20 states and 267 transitions. [2024-01-27 15:14:23,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 251 transitions, 2601 flow [2024-01-27 15:14:23,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 251 transitions, 2342 flow, removed 118 selfloop flow, removed 12 redundant places. [2024-01-27 15:14:23,501 INFO L231 Difference]: Finished difference. Result has 123 places, 131 transitions, 1527 flow [2024-01-27 15:14:23,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1527, PETRI_PLACES=123, PETRI_TRANSITIONS=131} [2024-01-27 15:14:23,502 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 96 predicate places. [2024-01-27 15:14:23,502 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 131 transitions, 1527 flow [2024-01-27 15:14:23,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.647058823529411) internal successors, (147), 17 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 15:14:23,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:23,503 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] [2024-01-27 15:14:23,520 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 15:14:23,716 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,SelfDestructingSolverStorable24 [2024-01-27 15:14:23,716 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:23,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:23,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2055922633, now seen corresponding path program 7 times [2024-01-27 15:14:23,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:23,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448379012] [2024-01-27 15:14:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:23,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:14:23,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:23,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448379012] [2024-01-27 15:14:23,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448379012] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:23,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14564095] [2024-01-27 15:14:23,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:14:23,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:23,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:23,900 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 15:14:23,917 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 15:14:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:24,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:14:24,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:14:24,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:14:24,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14564095] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:24,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:24,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-01-27 15:14:24,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744797749] [2024-01-27 15:14:24,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:24,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:14:24,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:24,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:14:24,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:14:24,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:24,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 131 transitions, 1527 flow. Second operand has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:24,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:24,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:24,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:24,887 INFO L124 PetriNetUnfolderBase]: 2145/3942 cut-off events. [2024-01-27 15:14:24,888 INFO L125 PetriNetUnfolderBase]: For 26075/26081 co-relation queries the response was YES. [2024-01-27 15:14:24,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18590 conditions, 3942 events. 2145/3942 cut-off events. For 26075/26081 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 25720 event pairs, 562 based on Foata normal form. 54/3994 useless extension candidates. Maximal degree in co-relation 18526. Up to 1892 conditions per place. [2024-01-27 15:14:24,922 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 145 selfloop transitions, 33 changer transitions 0/181 dead transitions. [2024-01-27 15:14:24,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 181 transitions, 2353 flow [2024-01-27 15:14:24,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:14:24,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:14:24,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-01-27 15:14:24,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824451410658307 [2024-01-27 15:14:24,923 INFO L175 Difference]: Start difference. First operand has 123 places, 131 transitions, 1527 flow. Second operand 11 states and 122 transitions. [2024-01-27 15:14:24,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 181 transitions, 2353 flow [2024-01-27 15:14:25,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 181 transitions, 2212 flow, removed 41 selfloop flow, removed 10 redundant places. [2024-01-27 15:14:25,011 INFO L231 Difference]: Finished difference. Result has 125 places, 127 transitions, 1448 flow [2024-01-27 15:14:25,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1448, PETRI_PLACES=125, PETRI_TRANSITIONS=127} [2024-01-27 15:14:25,011 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 98 predicate places. [2024-01-27 15:14:25,011 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 127 transitions, 1448 flow [2024-01-27 15:14:25,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:25,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:25,012 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:25,035 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 15:14:25,235 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,SelfDestructingSolverStorable25 [2024-01-27 15:14:25,235 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:25,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:25,236 INFO L85 PathProgramCache]: Analyzing trace with hash 429515226, now seen corresponding path program 1 times [2024-01-27 15:14:25,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:25,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221248867] [2024-01-27 15:14:25,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:25,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:25,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:25,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221248867] [2024-01-27 15:14:25,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221248867] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:25,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462045969] [2024-01-27 15:14:25,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:25,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:25,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:25,731 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 15:14:25,754 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 15:14:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:25,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 15:14:25,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:25,964 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-27 15:14:25,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2024-01-27 15:14:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:25,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:26,095 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-01-27 15:14:26,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-01-27 15:14:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:26,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462045969] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:26,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:26,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-01-27 15:14:26,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974958657] [2024-01-27 15:14:26,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:26,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:14:26,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:26,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:14:26,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:14:26,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:26,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 127 transitions, 1448 flow. Second operand has 19 states, 19 states have (on average 7.947368421052632) internal successors, (151), 19 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:26,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:26,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:26,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:26,831 INFO L124 PetriNetUnfolderBase]: 2181/4028 cut-off events. [2024-01-27 15:14:26,832 INFO L125 PetriNetUnfolderBase]: For 26848/26854 co-relation queries the response was YES. [2024-01-27 15:14:26,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19431 conditions, 4028 events. 2181/4028 cut-off events. For 26848/26854 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 26270 event pairs, 826 based on Foata normal form. 16/4042 useless extension candidates. Maximal degree in co-relation 19367. Up to 2990 conditions per place. [2024-01-27 15:14:26,865 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 144 selfloop transitions, 34 changer transitions 38/219 dead transitions. [2024-01-27 15:14:26,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 219 transitions, 2491 flow [2024-01-27 15:14:26,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:14:26,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:14:26,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 195 transitions. [2024-01-27 15:14:26,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2024-01-27 15:14:26,868 INFO L175 Difference]: Start difference. First operand has 125 places, 127 transitions, 1448 flow. Second operand 15 states and 195 transitions. [2024-01-27 15:14:26,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 219 transitions, 2491 flow [2024-01-27 15:14:26,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 219 transitions, 2463 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-01-27 15:14:26,961 INFO L231 Difference]: Finished difference. Result has 139 places, 130 transitions, 1563 flow [2024-01-27 15:14:26,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1563, PETRI_PLACES=139, PETRI_TRANSITIONS=130} [2024-01-27 15:14:26,962 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 112 predicate places. [2024-01-27 15:14:26,962 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 130 transitions, 1563 flow [2024-01-27 15:14:26,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.947368421052632) internal successors, (151), 19 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:26,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:26,963 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:26,978 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 15:14:27,178 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,SelfDestructingSolverStorable26 [2024-01-27 15:14:27,179 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:27,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:27,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1043612258, now seen corresponding path program 1 times [2024-01-27 15:14:27,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:27,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333999605] [2024-01-27 15:14:27,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:27,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:27,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:27,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333999605] [2024-01-27 15:14:27,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333999605] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:27,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561541819] [2024-01-27 15:14:27,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:27,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:27,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:27,692 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 15:14:27,714 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 15:14:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:27,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 15:14:27,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:27,942 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-01-27 15:14:27,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2024-01-27 15:14:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:27,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:28,061 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-01-27 15:14:28,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-01-27 15:14:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:28,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561541819] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:28,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:28,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-01-27 15:14:28,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542285869] [2024-01-27 15:14:28,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:28,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:14:28,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:28,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:14:28,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:14:28,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:28,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 130 transitions, 1563 flow. Second operand has 19 states, 19 states have (on average 8.263157894736842) internal successors, (157), 19 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:28,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:28,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:28,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:29,006 INFO L124 PetriNetUnfolderBase]: 2372/4384 cut-off events. [2024-01-27 15:14:29,006 INFO L125 PetriNetUnfolderBase]: For 40903/40909 co-relation queries the response was YES. [2024-01-27 15:14:29,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22967 conditions, 4384 events. 2372/4384 cut-off events. For 40903/40909 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 28889 event pairs, 648 based on Foata normal form. 108/4490 useless extension candidates. Maximal degree in co-relation 22897. Up to 2486 conditions per place. [2024-01-27 15:14:29,037 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 188 selfloop transitions, 61 changer transitions 1/253 dead transitions. [2024-01-27 15:14:29,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 253 transitions, 3268 flow [2024-01-27 15:14:29,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:14:29,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:14:29,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 218 transitions. [2024-01-27 15:14:29,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4698275862068966 [2024-01-27 15:14:29,039 INFO L175 Difference]: Start difference. First operand has 139 places, 130 transitions, 1563 flow. Second operand 16 states and 218 transitions. [2024-01-27 15:14:29,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 253 transitions, 3268 flow [2024-01-27 15:14:29,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 253 transitions, 3130 flow, removed 31 selfloop flow, removed 13 redundant places. [2024-01-27 15:14:29,140 INFO L231 Difference]: Finished difference. Result has 140 places, 147 transitions, 1895 flow [2024-01-27 15:14:29,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1457, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1895, PETRI_PLACES=140, PETRI_TRANSITIONS=147} [2024-01-27 15:14:29,140 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 113 predicate places. [2024-01-27 15:14:29,141 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 147 transitions, 1895 flow [2024-01-27 15:14:29,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.263157894736842) internal successors, (157), 19 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:29,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:29,141 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:29,154 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 15:14:29,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:29,346 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:29,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:29,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1772130122, now seen corresponding path program 2 times [2024-01-27 15:14:29,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:29,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383435257] [2024-01-27 15:14:29,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:29,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:29,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:29,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:29,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383435257] [2024-01-27 15:14:29,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383435257] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:29,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437939062] [2024-01-27 15:14:29,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:14:29,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:29,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:29,748 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 15:14:29,776 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 15:14:29,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:14:29,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:29,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:14:29,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:30,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:14:30,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-01-27 15:14:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:14:30,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:30,216 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-01-27 15:14:30,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-01-27 15:14:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:30,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437939062] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:30,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:30,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 20 [2024-01-27 15:14:30,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984215449] [2024-01-27 15:14:30,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:30,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:14:30,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:30,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:14:30,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:14:30,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:30,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 147 transitions, 1895 flow. Second operand has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 0 states have call successors, (0), 0 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 15:14:30,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:30,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:30,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:31,412 INFO L124 PetriNetUnfolderBase]: 2622/4831 cut-off events. [2024-01-27 15:14:31,412 INFO L125 PetriNetUnfolderBase]: For 45696/45696 co-relation queries the response was YES. [2024-01-27 15:14:31,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25997 conditions, 4831 events. 2622/4831 cut-off events. For 45696/45696 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 32502 event pairs, 875 based on Foata normal form. 24/4854 useless extension candidates. Maximal degree in co-relation 25928. Up to 3496 conditions per place. [2024-01-27 15:14:31,438 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 192 selfloop transitions, 68 changer transitions 9/272 dead transitions. [2024-01-27 15:14:31,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 272 transitions, 3490 flow [2024-01-27 15:14:31,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:14:31,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:14:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 256 transitions. [2024-01-27 15:14:31,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4413793103448276 [2024-01-27 15:14:31,440 INFO L175 Difference]: Start difference. First operand has 140 places, 147 transitions, 1895 flow. Second operand 20 states and 256 transitions. [2024-01-27 15:14:31,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 272 transitions, 3490 flow [2024-01-27 15:14:31,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 272 transitions, 3389 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-01-27 15:14:31,533 INFO L231 Difference]: Finished difference. Result has 158 places, 174 transitions, 2439 flow [2024-01-27 15:14:31,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2439, PETRI_PLACES=158, PETRI_TRANSITIONS=174} [2024-01-27 15:14:31,534 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 131 predicate places. [2024-01-27 15:14:31,534 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 174 transitions, 2439 flow [2024-01-27 15:14:31,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 0 states have call successors, (0), 0 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 15:14:31,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:31,535 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:31,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-27 15:14:31,736 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,SelfDestructingSolverStorable28 [2024-01-27 15:14:31,737 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:31,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:31,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1195368334, now seen corresponding path program 2 times [2024-01-27 15:14:31,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:31,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754341607] [2024-01-27 15:14:31,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:31,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:32,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:32,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754341607] [2024-01-27 15:14:32,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754341607] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:32,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381904092] [2024-01-27 15:14:32,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:14:32,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:32,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:32,016 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 15:14:32,048 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 15:14:32,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:14:32,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:32,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:14:32,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:32,323 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:14:32,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-01-27 15:14:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:14:32,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:32,431 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-01-27 15:14:32,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-01-27 15:14:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:32,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381904092] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:32,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:32,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 17 [2024-01-27 15:14:32,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736069748] [2024-01-27 15:14:32,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:32,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:14:32,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:32,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:14:32,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:14:32,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:32,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 174 transitions, 2439 flow. Second operand has 18 states, 18 states have (on average 7.555555555555555) internal successors, (136), 18 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 15:14:32,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:32,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:32,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:33,809 INFO L124 PetriNetUnfolderBase]: 2960/5474 cut-off events. [2024-01-27 15:14:33,810 INFO L125 PetriNetUnfolderBase]: For 78236/78236 co-relation queries the response was YES. [2024-01-27 15:14:33,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32795 conditions, 5474 events. 2960/5474 cut-off events. For 78236/78236 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 37764 event pairs, 947 based on Foata normal form. 12/5485 useless extension candidates. Maximal degree in co-relation 32718. Up to 3906 conditions per place. [2024-01-27 15:14:33,850 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 209 selfloop transitions, 97 changer transitions 10/319 dead transitions. [2024-01-27 15:14:33,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 319 transitions, 4515 flow [2024-01-27 15:14:33,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:14:33,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:14:33,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 303 transitions. [2024-01-27 15:14:33,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38697318007662834 [2024-01-27 15:14:33,851 INFO L175 Difference]: Start difference. First operand has 158 places, 174 transitions, 2439 flow. Second operand 27 states and 303 transitions. [2024-01-27 15:14:33,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 319 transitions, 4515 flow [2024-01-27 15:14:34,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 319 transitions, 4255 flow, removed 98 selfloop flow, removed 10 redundant places. [2024-01-27 15:14:34,031 INFO L231 Difference]: Finished difference. Result has 180 places, 213 transitions, 3228 flow [2024-01-27 15:14:34,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2249, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3228, PETRI_PLACES=180, PETRI_TRANSITIONS=213} [2024-01-27 15:14:34,031 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 153 predicate places. [2024-01-27 15:14:34,032 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 213 transitions, 3228 flow [2024-01-27 15:14:34,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.555555555555555) internal successors, (136), 18 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 15:14:34,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:34,032 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:34,043 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 15:14:34,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:34,233 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:34,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:34,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1646687330, now seen corresponding path program 3 times [2024-01-27 15:14:34,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:34,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806465475] [2024-01-27 15:14:34,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:34,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:34,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:34,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806465475] [2024-01-27 15:14:34,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806465475] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:34,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001295242] [2024-01-27 15:14:34,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:14:34,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:34,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:34,540 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 15:14:34,563 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 15:14:34,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:14:34,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:34,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 50 conjunts are in the unsatisfiable core [2024-01-27 15:14:34,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:34,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-01-27 15:14:34,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:14:34,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-27 15:14:34,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:14:34,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-27 15:14:34,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:14:34,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-27 15:14:34,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:14:34,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-27 15:14:34,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:14:34,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-27 15:14:34,760 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 15:14:34,797 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-27 15:14:34,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-01-27 15:14:34,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-27 15:14:34,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-27 15:14:35,019 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-27 15:14:35,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-01-27 15:14:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:35,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:35,348 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:14:35,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 66 [2024-01-27 15:14:35,397 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-27 15:14:35,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 208 treesize of output 184 [2024-01-27 15:14:35,410 INFO L173 IndexEqualityManager]: detected equality via solver [2024-01-27 15:14:35,412 INFO L173 IndexEqualityManager]: detected equality via solver [2024-01-27 15:14:35,450 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:14:35,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 140 treesize of output 132 [2024-01-27 15:14:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 2 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:35,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001295242] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:35,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:35,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 11] total 27 [2024-01-27 15:14:35,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700776019] [2024-01-27 15:14:35,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:35,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:14:35,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:35,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:14:35,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=616, Unknown=9, NotChecked=0, Total=756 [2024-01-27 15:14:35,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:35,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 213 transitions, 3228 flow. Second operand has 28 states, 28 states have (on average 6.928571428571429) internal successors, (194), 28 states have internal predecessors, (194), 0 states have call successors, (0), 0 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 15:14:35,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:35,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:35,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:37,256 INFO L124 PetriNetUnfolderBase]: 2950/5480 cut-off events. [2024-01-27 15:14:37,256 INFO L125 PetriNetUnfolderBase]: For 82600/82600 co-relation queries the response was YES. [2024-01-27 15:14:37,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33675 conditions, 5480 events. 2950/5480 cut-off events. For 82600/82600 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 38094 event pairs, 1187 based on Foata normal form. 12/5491 useless extension candidates. Maximal degree in co-relation 33590. Up to 4981 conditions per place. [2024-01-27 15:14:37,287 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 215 selfloop transitions, 46 changer transitions 21/285 dead transitions. [2024-01-27 15:14:37,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 285 transitions, 4346 flow [2024-01-27 15:14:37,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:14:37,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:14:37,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 207 transitions. [2024-01-27 15:14:37,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2024-01-27 15:14:37,290 INFO L175 Difference]: Start difference. First operand has 180 places, 213 transitions, 3228 flow. Second operand 18 states and 207 transitions. [2024-01-27 15:14:37,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 285 transitions, 4346 flow [2024-01-27 15:14:37,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 285 transitions, 4052 flow, removed 106 selfloop flow, removed 15 redundant places. [2024-01-27 15:14:37,486 INFO L231 Difference]: Finished difference. Result has 185 places, 216 transitions, 3189 flow [2024-01-27 15:14:37,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3008, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3189, PETRI_PLACES=185, PETRI_TRANSITIONS=216} [2024-01-27 15:14:37,486 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 158 predicate places. [2024-01-27 15:14:37,486 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 216 transitions, 3189 flow [2024-01-27 15:14:37,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.928571428571429) internal successors, (194), 28 states have internal predecessors, (194), 0 states have call successors, (0), 0 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 15:14:37,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:37,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:37,500 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 15:14:37,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:37,688 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:37,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:37,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1762450928, now seen corresponding path program 4 times [2024-01-27 15:14:37,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:37,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555776597] [2024-01-27 15:14:37,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:37,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:38,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:38,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555776597] [2024-01-27 15:14:38,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555776597] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:38,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991041273] [2024-01-27 15:14:38,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:14:38,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:38,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:38,010 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 15:14:38,012 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 15:14:38,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:14:38,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:38,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-27 15:14:38,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:38,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-27 15:14:38,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:14:38,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2024-01-27 15:14:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:14:38,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:38,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:14:38,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2024-01-27 15:14:38,533 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:14:38,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2024-01-27 15:14:38,606 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:14:38,607 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 190 treesize of output 185 [2024-01-27 15:14:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:14:38,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991041273] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:38,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:38,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 23 [2024-01-27 15:14:38,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420457885] [2024-01-27 15:14:38,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:38,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:14:38,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:38,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:14:38,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:14:38,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:38,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 216 transitions, 3189 flow. Second operand has 24 states, 24 states have (on average 7.416666666666667) internal successors, (178), 24 states have internal predecessors, (178), 0 states have call successors, (0), 0 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 15:14:38,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:38,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:38,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:40,339 INFO L124 PetriNetUnfolderBase]: 2916/5407 cut-off events. [2024-01-27 15:14:40,340 INFO L125 PetriNetUnfolderBase]: For 75624/75624 co-relation queries the response was YES. [2024-01-27 15:14:40,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32544 conditions, 5407 events. 2916/5407 cut-off events. For 75624/75624 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 37465 event pairs, 1141 based on Foata normal form. 24/5430 useless extension candidates. Maximal degree in co-relation 32454. Up to 4793 conditions per place. [2024-01-27 15:14:40,380 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 226 selfloop transitions, 60 changer transitions 1/290 dead transitions. [2024-01-27 15:14:40,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 290 transitions, 4309 flow [2024-01-27 15:14:40,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:14:40,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:14:40,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 226 transitions. [2024-01-27 15:14:40,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-01-27 15:14:40,385 INFO L175 Difference]: Start difference. First operand has 185 places, 216 transitions, 3189 flow. Second operand 20 states and 226 transitions. [2024-01-27 15:14:40,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 290 transitions, 4309 flow [2024-01-27 15:14:40,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 290 transitions, 4220 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-01-27 15:14:40,577 INFO L231 Difference]: Finished difference. Result has 189 places, 221 transitions, 3322 flow [2024-01-27 15:14:40,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3104, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3322, PETRI_PLACES=189, PETRI_TRANSITIONS=221} [2024-01-27 15:14:40,577 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 162 predicate places. [2024-01-27 15:14:40,578 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 221 transitions, 3322 flow [2024-01-27 15:14:40,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.416666666666667) internal successors, (178), 24 states have internal predecessors, (178), 0 states have call successors, (0), 0 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 15:14:40,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:40,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:40,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-27 15:14:40,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:40,779 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:40,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:40,779 INFO L85 PathProgramCache]: Analyzing trace with hash 465290778, now seen corresponding path program 3 times [2024-01-27 15:14:40,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:40,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065317666] [2024-01-27 15:14:40,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:40,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:41,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:41,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065317666] [2024-01-27 15:14:41,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065317666] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:41,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709540951] [2024-01-27 15:14:41,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:14:41,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:41,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:41,148 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 15:14:41,173 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 15:14:41,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:14:41,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:41,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:14:41,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:41,486 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-27 15:14:41,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-01-27 15:14:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:14:41,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:41,591 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-01-27 15:14:41,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-01-27 15:14:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:41,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709540951] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:41,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:41,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 21 [2024-01-27 15:14:41,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587851251] [2024-01-27 15:14:41,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:41,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:14:41,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:41,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:14:41,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:14:41,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:41,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 221 transitions, 3322 flow. Second operand has 22 states, 22 states have (on average 7.590909090909091) internal successors, (167), 22 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:41,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:41,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:41,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:43,249 INFO L124 PetriNetUnfolderBase]: 3223/5937 cut-off events. [2024-01-27 15:14:43,249 INFO L125 PetriNetUnfolderBase]: For 99296/99296 co-relation queries the response was YES. [2024-01-27 15:14:43,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36778 conditions, 5937 events. 3223/5937 cut-off events. For 99296/99296 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 41491 event pairs, 711 based on Foata normal form. 174/6110 useless extension candidates. Maximal degree in co-relation 36689. Up to 3374 conditions per place. [2024-01-27 15:14:43,293 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 288 selfloop transitions, 151 changer transitions 5/447 dead transitions. [2024-01-27 15:14:43,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 447 transitions, 6573 flow [2024-01-27 15:14:43,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-01-27 15:14:43,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-01-27 15:14:43,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 455 transitions. [2024-01-27 15:14:43,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43582375478927204 [2024-01-27 15:14:43,296 INFO L175 Difference]: Start difference. First operand has 189 places, 221 transitions, 3322 flow. Second operand 36 states and 455 transitions. [2024-01-27 15:14:43,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 447 transitions, 6573 flow [2024-01-27 15:14:43,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 447 transitions, 6444 flow, removed 11 selfloop flow, removed 15 redundant places. [2024-01-27 15:14:43,617 INFO L231 Difference]: Finished difference. Result has 217 places, 273 transitions, 4530 flow [2024-01-27 15:14:43,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3229, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=4530, PETRI_PLACES=217, PETRI_TRANSITIONS=273} [2024-01-27 15:14:43,618 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 190 predicate places. [2024-01-27 15:14:43,618 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 273 transitions, 4530 flow [2024-01-27 15:14:43,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.590909090909091) internal successors, (167), 22 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:43,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:43,618 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:43,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-27 15:14:43,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:43,819 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:43,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:43,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1434260038, now seen corresponding path program 4 times [2024-01-27 15:14:43,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:43,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762241195] [2024-01-27 15:14:43,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:43,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:44,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:44,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762241195] [2024-01-27 15:14:44,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762241195] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:44,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262668911] [2024-01-27 15:14:44,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:14:44,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:44,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:44,176 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:14:44,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-27 15:14:44,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:14:44,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:44,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:14:44,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:44,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:14:44,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2024-01-27 15:14:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:44,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:44,544 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-01-27 15:14:44,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-01-27 15:14:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:44,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262668911] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:44,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:44,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2024-01-27 15:14:44,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829756731] [2024-01-27 15:14:44,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:44,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:14:44,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:44,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:14:44,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:14:44,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:44,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 273 transitions, 4530 flow. Second operand has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 15:14:44,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:44,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:44,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:46,070 INFO L124 PetriNetUnfolderBase]: 3121/5748 cut-off events. [2024-01-27 15:14:46,070 INFO L125 PetriNetUnfolderBase]: For 149802/149802 co-relation queries the response was YES. [2024-01-27 15:14:46,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39172 conditions, 5748 events. 3121/5748 cut-off events. For 149802/149802 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 39904 event pairs, 911 based on Foata normal form. 120/5867 useless extension candidates. Maximal degree in co-relation 39075. Up to 4020 conditions per place. [2024-01-27 15:14:46,119 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 237 selfloop transitions, 141 changer transitions 8/389 dead transitions. [2024-01-27 15:14:46,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 389 transitions, 6242 flow [2024-01-27 15:14:46,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 15:14:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 15:14:46,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 331 transitions. [2024-01-27 15:14:46,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935790725326992 [2024-01-27 15:14:46,121 INFO L175 Difference]: Start difference. First operand has 217 places, 273 transitions, 4530 flow. Second operand 29 states and 331 transitions. [2024-01-27 15:14:46,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 389 transitions, 6242 flow [2024-01-27 15:14:46,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 389 transitions, 5687 flow, removed 133 selfloop flow, removed 23 redundant places. [2024-01-27 15:14:46,516 INFO L231 Difference]: Finished difference. Result has 225 places, 280 transitions, 4481 flow [2024-01-27 15:14:46,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3981, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4481, PETRI_PLACES=225, PETRI_TRANSITIONS=280} [2024-01-27 15:14:46,516 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 198 predicate places. [2024-01-27 15:14:46,517 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 280 transitions, 4481 flow [2024-01-27 15:14:46,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 15:14:46,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:46,517 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:46,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-01-27 15:14:46,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-01-27 15:14:46,718 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:46,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:46,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1340712200, now seen corresponding path program 5 times [2024-01-27 15:14:46,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:46,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180449889] [2024-01-27 15:14:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:46,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:47,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:47,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180449889] [2024-01-27 15:14:47,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180449889] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:47,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946165378] [2024-01-27 15:14:47,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:14:47,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:47,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:47,065 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:14:47,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-27 15:14:47,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:14:47,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:47,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 15:14:47,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:47,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:14:47,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-01-27 15:14:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:47,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:47,355 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-27 15:14:47,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-27 15:14:47,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:47,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946165378] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:47,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:47,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 16 [2024-01-27 15:14:47,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850855227] [2024-01-27 15:14:47,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:47,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:14:47,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:47,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:14:47,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:14:47,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:47,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 280 transitions, 4481 flow. Second operand has 17 states, 17 states have (on average 8.117647058823529) internal successors, (138), 17 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 15:14:47,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:47,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:47,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:48,856 INFO L124 PetriNetUnfolderBase]: 3494/6455 cut-off events. [2024-01-27 15:14:48,857 INFO L125 PetriNetUnfolderBase]: For 146522/146525 co-relation queries the response was YES. [2024-01-27 15:14:48,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43259 conditions, 6455 events. 3494/6455 cut-off events. For 146522/146525 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 46323 event pairs, 1031 based on Foata normal form. 38/6491 useless extension candidates. Maximal degree in co-relation 43162. Up to 4732 conditions per place. [2024-01-27 15:14:48,908 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 286 selfloop transitions, 117 changer transitions 4/410 dead transitions. [2024-01-27 15:14:48,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 410 transitions, 6695 flow [2024-01-27 15:14:48,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:14:48,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:14:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 264 transitions. [2024-01-27 15:14:48,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45517241379310347 [2024-01-27 15:14:48,910 INFO L175 Difference]: Start difference. First operand has 225 places, 280 transitions, 4481 flow. Second operand 20 states and 264 transitions. [2024-01-27 15:14:48,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 410 transitions, 6695 flow [2024-01-27 15:14:49,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 410 transitions, 6442 flow, removed 12 selfloop flow, removed 20 redundant places. [2024-01-27 15:14:49,406 INFO L231 Difference]: Finished difference. Result has 231 places, 320 transitions, 5494 flow [2024-01-27 15:14:49,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4256, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5494, PETRI_PLACES=231, PETRI_TRANSITIONS=320} [2024-01-27 15:14:49,407 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 204 predicate places. [2024-01-27 15:14:49,407 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 320 transitions, 5494 flow [2024-01-27 15:14:49,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.117647058823529) internal successors, (138), 17 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 15:14:49,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:49,407 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:49,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-27 15:14:49,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-01-27 15:14:49,613 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:49,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:49,613 INFO L85 PathProgramCache]: Analyzing trace with hash 649670272, now seen corresponding path program 5 times [2024-01-27 15:14:49,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:49,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852475852] [2024-01-27 15:14:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:49,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:49,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:49,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852475852] [2024-01-27 15:14:49,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852475852] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:49,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936284980] [2024-01-27 15:14:49,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:14:49,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:49,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:49,900 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:14:49,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-27 15:14:50,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:14:50,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:50,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:14:50,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:50,162 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-27 15:14:50,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2024-01-27 15:14:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:50,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:50,248 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-27 15:14:50,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-27 15:14:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:50,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936284980] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:50,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:50,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 18 [2024-01-27 15:14:50,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872636985] [2024-01-27 15:14:50,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:50,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:14:50,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:50,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:14:50,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:14:50,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:50,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 320 transitions, 5494 flow. Second operand has 19 states, 19 states have (on average 7.947368421052632) internal successors, (151), 19 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:50,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:50,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:50,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:51,456 INFO L124 PetriNetUnfolderBase]: 3496/6465 cut-off events. [2024-01-27 15:14:51,457 INFO L125 PetriNetUnfolderBase]: For 150532/150535 co-relation queries the response was YES. [2024-01-27 15:14:51,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44236 conditions, 6465 events. 3496/6465 cut-off events. For 150532/150535 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 46441 event pairs, 1135 based on Foata normal form. 10/6473 useless extension candidates. Maximal degree in co-relation 44132. Up to 5422 conditions per place. [2024-01-27 15:14:51,512 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 272 selfloop transitions, 85 changer transitions 22/382 dead transitions. [2024-01-27 15:14:51,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 382 transitions, 6610 flow [2024-01-27 15:14:51,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:14:51,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:14:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 195 transitions. [2024-01-27 15:14:51,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2024-01-27 15:14:51,516 INFO L175 Difference]: Start difference. First operand has 231 places, 320 transitions, 5494 flow. Second operand 15 states and 195 transitions. [2024-01-27 15:14:51,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 382 transitions, 6610 flow [2024-01-27 15:14:52,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 382 transitions, 6170 flow, removed 179 selfloop flow, removed 10 redundant places. [2024-01-27 15:14:52,319 INFO L231 Difference]: Finished difference. Result has 238 places, 319 transitions, 5243 flow [2024-01-27 15:14:52,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5057, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5243, PETRI_PLACES=238, PETRI_TRANSITIONS=319} [2024-01-27 15:14:52,320 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 211 predicate places. [2024-01-27 15:14:52,320 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 319 transitions, 5243 flow [2024-01-27 15:14:52,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.947368421052632) internal successors, (151), 19 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:52,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:52,321 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:52,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-27 15:14:52,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:52,521 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:52,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:52,522 INFO L85 PathProgramCache]: Analyzing trace with hash -639586212, now seen corresponding path program 6 times [2024-01-27 15:14:52,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:52,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698008815] [2024-01-27 15:14:52,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:52,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:52,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:52,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698008815] [2024-01-27 15:14:52,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698008815] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:52,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790399502] [2024-01-27 15:14:52,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:14:52,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:52,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:52,812 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:14:52,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-27 15:14:52,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:14:52,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:52,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:14:52,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:53,084 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-27 15:14:53,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-01-27 15:14:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:53,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:53,144 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-27 15:14:53,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-27 15:14:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:53,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790399502] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:53,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:53,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 14 [2024-01-27 15:14:53,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974257202] [2024-01-27 15:14:53,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:53,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:14:53,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:53,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:14:53,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:14:53,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:53,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 319 transitions, 5243 flow. Second operand has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:53,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:53,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:53,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:54,447 INFO L124 PetriNetUnfolderBase]: 3580/6624 cut-off events. [2024-01-27 15:14:54,447 INFO L125 PetriNetUnfolderBase]: For 111490/111493 co-relation queries the response was YES. [2024-01-27 15:14:54,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42555 conditions, 6624 events. 3580/6624 cut-off events. For 111490/111493 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 47886 event pairs, 925 based on Foata normal form. 38/6660 useless extension candidates. Maximal degree in co-relation 42451. Up to 4321 conditions per place. [2024-01-27 15:14:54,503 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 290 selfloop transitions, 120 changer transitions 2/415 dead transitions. [2024-01-27 15:14:54,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 415 transitions, 7007 flow [2024-01-27 15:14:54,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:14:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:14:54,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 220 transitions. [2024-01-27 15:14:54,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47413793103448276 [2024-01-27 15:14:54,505 INFO L175 Difference]: Start difference. First operand has 238 places, 319 transitions, 5243 flow. Second operand 16 states and 220 transitions. [2024-01-27 15:14:54,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 415 transitions, 7007 flow [2024-01-27 15:14:54,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 415 transitions, 6802 flow, removed 9 selfloop flow, removed 14 redundant places. [2024-01-27 15:14:54,867 INFO L231 Difference]: Finished difference. Result has 241 places, 323 transitions, 5437 flow [2024-01-27 15:14:54,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5046, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5437, PETRI_PLACES=241, PETRI_TRANSITIONS=323} [2024-01-27 15:14:54,867 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 214 predicate places. [2024-01-27 15:14:54,867 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 323 transitions, 5437 flow [2024-01-27 15:14:54,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:54,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:54,868 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:54,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-01-27 15:14:55,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:55,068 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:55,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:55,069 INFO L85 PathProgramCache]: Analyzing trace with hash -907243150, now seen corresponding path program 7 times [2024-01-27 15:14:55,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:55,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793477928] [2024-01-27 15:14:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:55,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:55,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:55,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793477928] [2024-01-27 15:14:55,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793477928] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:55,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794929683] [2024-01-27 15:14:55,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:14:55,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:55,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:55,396 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:14:55,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-27 15:14:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:55,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 15:14:55,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:55,651 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-27 15:14:55,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2024-01-27 15:14:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:55,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:55,735 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-27 15:14:55,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-27 15:14:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 15:14:55,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794929683] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:55,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:55,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2024-01-27 15:14:55,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634576185] [2024-01-27 15:14:55,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:55,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:14:55,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:55,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:14:55,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:14:55,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:55,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 323 transitions, 5437 flow. Second operand has 18 states, 18 states have (on average 8.333333333333334) internal successors, (150), 18 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 15:14:55,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:55,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:55,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:57,038 INFO L124 PetriNetUnfolderBase]: 3534/6530 cut-off events. [2024-01-27 15:14:57,039 INFO L125 PetriNetUnfolderBase]: For 117174/117174 co-relation queries the response was YES. [2024-01-27 15:14:57,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43154 conditions, 6530 events. 3534/6530 cut-off events. For 117174/117174 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 46852 event pairs, 1175 based on Foata normal form. 12/6541 useless extension candidates. Maximal degree in co-relation 43049. Up to 5550 conditions per place. [2024-01-27 15:14:57,095 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 280 selfloop transitions, 81 changer transitions 17/381 dead transitions. [2024-01-27 15:14:57,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 381 transitions, 6503 flow [2024-01-27 15:14:57,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:14:57,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:14:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 190 transitions. [2024-01-27 15:14:57,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367816091954023 [2024-01-27 15:14:57,096 INFO L175 Difference]: Start difference. First operand has 241 places, 323 transitions, 5437 flow. Second operand 15 states and 190 transitions. [2024-01-27 15:14:57,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 381 transitions, 6503 flow [2024-01-27 15:14:57,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 381 transitions, 6285 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-01-27 15:14:57,495 INFO L231 Difference]: Finished difference. Result has 246 places, 325 transitions, 5465 flow [2024-01-27 15:14:57,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5203, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5465, PETRI_PLACES=246, PETRI_TRANSITIONS=325} [2024-01-27 15:14:57,496 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 219 predicate places. [2024-01-27 15:14:57,496 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 325 transitions, 5465 flow [2024-01-27 15:14:57,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.333333333333334) internal successors, (150), 18 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 15:14:57,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:57,496 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:57,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-01-27 15:14:57,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-01-27 15:14:57,706 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:57,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:57,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1635375926, now seen corresponding path program 8 times [2024-01-27 15:14:57,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:57,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217893862] [2024-01-27 15:14:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:57,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:58,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:58,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217893862] [2024-01-27 15:14:58,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217893862] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:58,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8731104] [2024-01-27 15:14:58,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:14:58,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:58,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:58,010 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:14:58,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-27 15:14:58,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:14:58,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:58,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:14:58,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:58,306 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:14:58,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-01-27 15:14:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:58,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:58,381 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-27 15:14:58,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-27 15:14:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:14:58,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8731104] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:58,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:58,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 18 [2024-01-27 15:14:58,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896622425] [2024-01-27 15:14:58,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:58,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:14:58,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:58,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:14:58,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:14:58,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:14:58,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 325 transitions, 5465 flow. Second operand has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 15:14:58,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:58,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:14:58,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:59,661 INFO L124 PetriNetUnfolderBase]: 3390/6230 cut-off events. [2024-01-27 15:14:59,661 INFO L125 PetriNetUnfolderBase]: For 112749/112752 co-relation queries the response was YES. [2024-01-27 15:14:59,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41380 conditions, 6230 events. 3390/6230 cut-off events. For 112749/112752 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 43904 event pairs, 1087 based on Foata normal form. 14/6242 useless extension candidates. Maximal degree in co-relation 41274. Up to 5041 conditions per place. [2024-01-27 15:14:59,714 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 254 selfloop transitions, 111 changer transitions 13/381 dead transitions. [2024-01-27 15:14:59,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 381 transitions, 6463 flow [2024-01-27 15:14:59,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:14:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:14:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 221 transitions. [2024-01-27 15:14:59,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010889292196007 [2024-01-27 15:14:59,715 INFO L175 Difference]: Start difference. First operand has 246 places, 325 transitions, 5465 flow. Second operand 19 states and 221 transitions. [2024-01-27 15:14:59,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 381 transitions, 6463 flow [2024-01-27 15:15:00,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 381 transitions, 6326 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-01-27 15:15:00,111 INFO L231 Difference]: Finished difference. Result has 255 places, 321 transitions, 5480 flow [2024-01-27 15:15:00,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5286, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5480, PETRI_PLACES=255, PETRI_TRANSITIONS=321} [2024-01-27 15:15:00,111 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 228 predicate places. [2024-01-27 15:15:00,111 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 321 transitions, 5480 flow [2024-01-27 15:15:00,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 15:15:00,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:15:00,112 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:15:00,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-01-27 15:15:00,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-01-27 15:15:00,316 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:15:00,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:15:00,316 INFO L85 PathProgramCache]: Analyzing trace with hash 504047724, now seen corresponding path program 6 times [2024-01-27 15:15:00,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:15:00,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344907276] [2024-01-27 15:15:00,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:15:00,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:15:00,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:15:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:15:00,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:15:00,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344907276] [2024-01-27 15:15:00,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344907276] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:15:00,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025183851] [2024-01-27 15:15:00,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:15:00,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:00,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:15:00,614 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:15:00,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-27 15:15:00,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:15:00,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:15:00,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 45 conjunts are in the unsatisfiable core [2024-01-27 15:15:00,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:15:00,844 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 15:15:01,001 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:15:01,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-01-27 15:15:01,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:15:01,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:15:01,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:15:01,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2024-01-27 15:15:01,217 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:15:01,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2024-01-27 15:15:01,296 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:15:01,297 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 190 treesize of output 185 [2024-01-27 15:15:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:15:01,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025183851] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:15:01,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:15:01,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 9] total 24 [2024-01-27 15:15:01,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349125965] [2024-01-27 15:15:01,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:15:01,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:15:01,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:15:01,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:15:01,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:15:01,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:15:01,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 321 transitions, 5480 flow. Second operand has 25 states, 25 states have (on average 7.32) internal successors, (183), 25 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 15:15:01,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:15:01,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:15:01,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:15:03,094 INFO L124 PetriNetUnfolderBase]: 3512/6502 cut-off events. [2024-01-27 15:15:03,094 INFO L125 PetriNetUnfolderBase]: For 119220/119223 co-relation queries the response was YES. [2024-01-27 15:15:03,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43009 conditions, 6502 events. 3512/6502 cut-off events. For 119220/119223 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 45980 event pairs, 1093 based on Foata normal form. 82/6582 useless extension candidates. Maximal degree in co-relation 42902. Up to 5576 conditions per place. [2024-01-27 15:15:03,153 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 317 selfloop transitions, 86 changer transitions 2/408 dead transitions. [2024-01-27 15:15:03,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 408 transitions, 7221 flow [2024-01-27 15:15:03,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:15:03,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:15:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 226 transitions. [2024-01-27 15:15:03,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-01-27 15:15:03,154 INFO L175 Difference]: Start difference. First operand has 255 places, 321 transitions, 5480 flow. Second operand 20 states and 226 transitions. [2024-01-27 15:15:03,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 408 transitions, 7221 flow [2024-01-27 15:15:03,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 408 transitions, 6921 flow, removed 13 selfloop flow, removed 19 redundant places. [2024-01-27 15:15:03,550 INFO L231 Difference]: Finished difference. Result has 255 places, 341 transitions, 5910 flow [2024-01-27 15:15:03,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5228, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5910, PETRI_PLACES=255, PETRI_TRANSITIONS=341} [2024-01-27 15:15:03,551 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 228 predicate places. [2024-01-27 15:15:03,551 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 341 transitions, 5910 flow [2024-01-27 15:15:03,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.32) internal successors, (183), 25 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 15:15:03,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:15:03,552 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:15:03,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-01-27 15:15:03,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-01-27 15:15:03,752 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:15:03,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:15:03,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2126258226, now seen corresponding path program 7 times [2024-01-27 15:15:03,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:15:03,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521288897] [2024-01-27 15:15:03,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:15:03,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:15:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:15:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:15:04,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:15:04,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521288897] [2024-01-27 15:15:04,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521288897] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:15:04,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494533655] [2024-01-27 15:15:04,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:15:04,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:04,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:15:04,045 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:15:04,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-27 15:15:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:15:04,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 15:15:04,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:15:04,257 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:15:04,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-01-27 15:15:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:15:04,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:15:04,344 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-27 15:15:04,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-27 15:15:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:15:04,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494533655] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:15:04,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:15:04,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 16 [2024-01-27 15:15:04,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953004354] [2024-01-27 15:15:04,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:15:04,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:15:04,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:15:04,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:15:04,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:15:04,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:15:04,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 341 transitions, 5910 flow. Second operand has 17 states, 17 states have (on average 8.117647058823529) internal successors, (138), 17 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 15:15:04,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:15:04,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:15:04,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:15:05,734 INFO L124 PetriNetUnfolderBase]: 3396/6242 cut-off events. [2024-01-27 15:15:05,734 INFO L125 PetriNetUnfolderBase]: For 115933/115936 co-relation queries the response was YES. [2024-01-27 15:15:05,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42098 conditions, 6242 events. 3396/6242 cut-off events. For 115933/115936 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 43072 event pairs, 971 based on Foata normal form. 22/6262 useless extension candidates. Maximal degree in co-relation 41987. Up to 4999 conditions per place. [2024-01-27 15:15:05,789 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 310 selfloop transitions, 122 changer transitions 7/442 dead transitions. [2024-01-27 15:15:05,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 442 transitions, 7512 flow [2024-01-27 15:15:05,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:15:05,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:15:05,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 280 transitions. [2024-01-27 15:15:05,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197901049475262 [2024-01-27 15:15:05,790 INFO L175 Difference]: Start difference. First operand has 255 places, 341 transitions, 5910 flow. Second operand 23 states and 280 transitions. [2024-01-27 15:15:05,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 442 transitions, 7512 flow [2024-01-27 15:15:06,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 442 transitions, 7409 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-01-27 15:15:06,199 INFO L231 Difference]: Finished difference. Result has 271 places, 350 transitions, 6316 flow [2024-01-27 15:15:06,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5733, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6316, PETRI_PLACES=271, PETRI_TRANSITIONS=350} [2024-01-27 15:15:06,200 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 244 predicate places. [2024-01-27 15:15:06,200 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 350 transitions, 6316 flow [2024-01-27 15:15:06,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.117647058823529) internal successors, (138), 17 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 15:15:06,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:15:06,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:15:06,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-01-27 15:15:06,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:06,401 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:15:06,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:15:06,401 INFO L85 PathProgramCache]: Analyzing trace with hash 736538974, now seen corresponding path program 9 times [2024-01-27 15:15:06,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:15:06,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3398242] [2024-01-27 15:15:06,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:15:06,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:15:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:15:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:15:06,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:15:06,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3398242] [2024-01-27 15:15:06,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3398242] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:15:06,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065732991] [2024-01-27 15:15:06,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:15:06,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:06,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:15:06,667 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:15:06,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-01-27 15:15:06,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:15:06,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:15:06,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-27 15:15:06,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:15:06,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-27 15:15:07,040 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-01-27 15:15:07,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2024-01-27 15:15:07,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:15:07,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:15:07,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:15:07,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2024-01-27 15:15:07,251 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:15:07,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2024-01-27 15:15:07,301 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:15:07,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 194 [2024-01-27 15:15:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:15:07,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065732991] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:15:07,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:15:07,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 24 [2024-01-27 15:15:07,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583203126] [2024-01-27 15:15:07,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:15:07,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:15:07,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:15:07,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:15:07,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:15:07,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:15:07,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 350 transitions, 6316 flow. Second operand has 25 states, 25 states have (on average 7.48) internal successors, (187), 25 states have internal predecessors, (187), 0 states have call successors, (0), 0 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 15:15:07,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:15:07,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:15:07,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:15:09,078 INFO L124 PetriNetUnfolderBase]: 3570/6563 cut-off events. [2024-01-27 15:15:09,079 INFO L125 PetriNetUnfolderBase]: For 134451/134454 co-relation queries the response was YES. [2024-01-27 15:15:09,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45423 conditions, 6563 events. 3570/6563 cut-off events. For 134451/134454 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 45666 event pairs, 980 based on Foata normal form. 26/6587 useless extension candidates. Maximal degree in co-relation 45310. Up to 5585 conditions per place. [2024-01-27 15:15:09,147 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 408 selfloop transitions, 45 changer transitions 1/457 dead transitions. [2024-01-27 15:15:09,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 457 transitions, 8629 flow [2024-01-27 15:15:09,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:15:09,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:15:09,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 230 transitions. [2024-01-27 15:15:09,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41742286751361163 [2024-01-27 15:15:09,148 INFO L175 Difference]: Start difference. First operand has 271 places, 350 transitions, 6316 flow. Second operand 19 states and 230 transitions. [2024-01-27 15:15:09,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 457 transitions, 8629 flow [2024-01-27 15:15:09,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 457 transitions, 8320 flow, removed 87 selfloop flow, removed 13 redundant places. [2024-01-27 15:15:09,644 INFO L231 Difference]: Finished difference. Result has 278 places, 363 transitions, 6427 flow [2024-01-27 15:15:09,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6031, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6427, PETRI_PLACES=278, PETRI_TRANSITIONS=363} [2024-01-27 15:15:09,645 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 251 predicate places. [2024-01-27 15:15:09,645 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 363 transitions, 6427 flow [2024-01-27 15:15:09,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.48) internal successors, (187), 25 states have internal predecessors, (187), 0 states have call successors, (0), 0 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 15:15:09,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:15:09,645 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:15:09,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-01-27 15:15:09,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:09,846 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:15:09,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:15:09,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1700565130, now seen corresponding path program 8 times [2024-01-27 15:15:09,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:15:09,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103112451] [2024-01-27 15:15:09,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:15:09,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:15:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:15:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:15:10,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:15:10,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103112451] [2024-01-27 15:15:10,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103112451] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:15:10,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751085499] [2024-01-27 15:15:10,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:15:10,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:10,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:15:10,180 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:15:10,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-01-27 15:15:10,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:15:10,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:15:10,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:15:10,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:15:10,577 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-27 15:15:10,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-01-27 15:15:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:15:10,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:15:10,657 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-01-27 15:15:10,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-01-27 15:15:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:15:10,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751085499] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:15:10,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:15:10,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 21 [2024-01-27 15:15:10,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507791727] [2024-01-27 15:15:10,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:15:10,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:15:10,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:15:10,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:15:10,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:15:10,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:15:10,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 363 transitions, 6427 flow. Second operand has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 22 states have internal predecessors, (169), 0 states have call successors, (0), 0 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 15:15:10,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:15:10,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:15:10,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:15:12,161 INFO L124 PetriNetUnfolderBase]: 3608/6656 cut-off events. [2024-01-27 15:15:12,161 INFO L125 PetriNetUnfolderBase]: For 136436/136439 co-relation queries the response was YES. [2024-01-27 15:15:12,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45890 conditions, 6656 events. 3608/6656 cut-off events. For 136436/136439 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 46819 event pairs, 1000 based on Foata normal form. 10/6664 useless extension candidates. Maximal degree in co-relation 45769. Up to 5578 conditions per place. [2024-01-27 15:15:12,229 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 371 selfloop transitions, 43 changer transitions 33/450 dead transitions. [2024-01-27 15:15:12,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 450 transitions, 8269 flow [2024-01-27 15:15:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:15:12,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:15:12,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 196 transitions. [2024-01-27 15:15:12,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224137931034483 [2024-01-27 15:15:12,230 INFO L175 Difference]: Start difference. First operand has 278 places, 363 transitions, 6427 flow. Second operand 16 states and 196 transitions. [2024-01-27 15:15:12,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 450 transitions, 8269 flow [2024-01-27 15:15:12,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 450 transitions, 8002 flow, removed 68 selfloop flow, removed 12 redundant places. [2024-01-27 15:15:12,933 INFO L231 Difference]: Finished difference. Result has 287 places, 363 transitions, 6338 flow [2024-01-27 15:15:12,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6162, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6338, PETRI_PLACES=287, PETRI_TRANSITIONS=363} [2024-01-27 15:15:12,933 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 260 predicate places. [2024-01-27 15:15:12,934 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 363 transitions, 6338 flow [2024-01-27 15:15:12,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 22 states have internal predecessors, (169), 0 states have call successors, (0), 0 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 15:15:12,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:15:12,934 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:15:12,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-01-27 15:15:13,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:13,135 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:15:13,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:15:13,135 INFO L85 PathProgramCache]: Analyzing trace with hash -737976984, now seen corresponding path program 9 times [2024-01-27 15:15:13,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:15:13,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504664440] [2024-01-27 15:15:13,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:15:13,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:15:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:15:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:15:13,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:15:13,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504664440] [2024-01-27 15:15:13,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504664440] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:15:13,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016212894] [2024-01-27 15:15:13,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:15:13,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:13,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:15:13,448 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:15:13,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-01-27 15:15:13,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:15:13,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:15:13,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjunts are in the unsatisfiable core [2024-01-27 15:15:13,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:15:13,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-01-27 15:15:13,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:15:13,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-27 15:15:13,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:15:13,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-27 15:15:13,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:15:13,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-27 15:15:13,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:15:13,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-27 15:15:13,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:15:13,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-27 15:15:13,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-27 15:15:13,695 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-27 15:15:13,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-01-27 15:15:13,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-27 15:15:13,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-27 15:15:13,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2024-01-27 15:15:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:15:13,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:15:16,471 INFO L349 Elim1Store]: treesize reduction 41, result has 52.3 percent of original size [2024-01-27 15:15:16,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 128 [2024-01-27 15:15:16,823 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:15:16,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2024-01-27 15:15:16,838 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-01-27 15:15:16,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 78 [2024-01-27 15:15:16,881 INFO L349 Elim1Store]: treesize reduction 20, result has 71.8 percent of original size [2024-01-27 15:15:16,882 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 73 treesize of output 84 [2024-01-27 15:15:16,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:15:16,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 74 [2024-01-27 15:15:16,940 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-01-27 15:15:16,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 107 [2024-01-27 15:15:17,011 INFO L349 Elim1Store]: treesize reduction 20, result has 82.3 percent of original size [2024-01-27 15:15:17,011 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 102 treesize of output 141 [2024-01-27 15:15:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:15:17,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016212894] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:15:17,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:15:17,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 12] total 29 [2024-01-27 15:15:17,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238459635] [2024-01-27 15:15:17,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:15:17,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:15:17,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:15:17,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:15:17,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=753, Unknown=1, NotChecked=0, Total=870 [2024-01-27 15:15:17,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:15:17,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 363 transitions, 6338 flow. Second operand has 30 states, 30 states have (on average 6.966666666666667) internal successors, (209), 30 states have internal predecessors, (209), 0 states have call successors, (0), 0 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 15:15:17,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:15:17,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:15:17,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:15:23,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:15:28,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:15:33,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:15:37,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:15:39,749 INFO L124 PetriNetUnfolderBase]: 5348/9838 cut-off events. [2024-01-27 15:15:39,749 INFO L125 PetriNetUnfolderBase]: For 268227/268230 co-relation queries the response was YES. [2024-01-27 15:15:39,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69989 conditions, 9838 events. 5348/9838 cut-off events. For 268227/268230 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 74791 event pairs, 1480 based on Foata normal form. 98/9934 useless extension candidates. Maximal degree in co-relation 69864. Up to 6076 conditions per place. [2024-01-27 15:15:39,834 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 549 selfloop transitions, 174 changer transitions 12/738 dead transitions. [2024-01-27 15:15:39,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 738 transitions, 12982 flow [2024-01-27 15:15:39,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-01-27 15:15:39,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-01-27 15:15:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 535 transitions. [2024-01-27 15:15:39,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099616858237548 [2024-01-27 15:15:39,839 INFO L175 Difference]: Start difference. First operand has 287 places, 363 transitions, 6338 flow. Second operand 45 states and 535 transitions. [2024-01-27 15:15:39,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 738 transitions, 12982 flow [2024-01-27 15:15:40,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 738 transitions, 12499 flow, removed 139 selfloop flow, removed 13 redundant places. [2024-01-27 15:15:40,953 INFO L231 Difference]: Finished difference. Result has 331 places, 506 transitions, 9478 flow [2024-01-27 15:15:40,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6204, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=9478, PETRI_PLACES=331, PETRI_TRANSITIONS=506} [2024-01-27 15:15:40,954 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 304 predicate places. [2024-01-27 15:15:40,954 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 506 transitions, 9478 flow [2024-01-27 15:15:40,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.966666666666667) internal successors, (209), 30 states have internal predecessors, (209), 0 states have call successors, (0), 0 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 15:15:40,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:15:40,955 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:15:40,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-01-27 15:15:41,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-01-27 15:15:41,161 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:15:41,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:15:41,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1347212278, now seen corresponding path program 10 times [2024-01-27 15:15:41,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:15:41,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164940217] [2024-01-27 15:15:41,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:15:41,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:15:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:15:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:15:41,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:15:41,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164940217] [2024-01-27 15:15:41,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164940217] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:15:41,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841550924] [2024-01-27 15:15:41,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:15:41,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:41,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:15:41,542 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:15:41,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-01-27 15:15:41,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:15:41,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:15:41,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:15:41,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:15:41,888 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:15:41,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2024-01-27 15:15:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:15:41,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:15:42,023 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-01-27 15:15:42,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-01-27 15:15:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:15:42,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841550924] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:15:42,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:15:42,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2024-01-27 15:15:42,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776203876] [2024-01-27 15:15:42,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:15:42,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:15:42,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:15:42,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:15:42,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:15:42,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:15:42,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 506 transitions, 9478 flow. Second operand has 19 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:15:42,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:15:42,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:15:42,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:15:45,664 INFO L124 PetriNetUnfolderBase]: 5976/10993 cut-off events. [2024-01-27 15:15:45,664 INFO L125 PetriNetUnfolderBase]: For 293385/293388 co-relation queries the response was YES. [2024-01-27 15:15:45,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80236 conditions, 10993 events. 5976/10993 cut-off events. For 293385/293388 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 85551 event pairs, 1304 based on Foata normal form. 50/11039 useless extension candidates. Maximal degree in co-relation 80097. Up to 7070 conditions per place. [2024-01-27 15:15:45,773 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 487 selfloop transitions, 197 changer transitions 23/710 dead transitions. [2024-01-27 15:15:45,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 710 transitions, 14329 flow [2024-01-27 15:15:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 15:15:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 15:15:45,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 313 transitions. [2024-01-27 15:15:45,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4151193633952255 [2024-01-27 15:15:45,775 INFO L175 Difference]: Start difference. First operand has 331 places, 506 transitions, 9478 flow. Second operand 26 states and 313 transitions. [2024-01-27 15:15:45,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 710 transitions, 14329 flow [2024-01-27 15:15:47,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 710 transitions, 12623 flow, removed 836 selfloop flow, removed 7 redundant places. [2024-01-27 15:15:47,447 INFO L231 Difference]: Finished difference. Result has 358 places, 582 transitions, 10642 flow [2024-01-27 15:15:47,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=8426, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=10642, PETRI_PLACES=358, PETRI_TRANSITIONS=582} [2024-01-27 15:15:47,448 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 331 predicate places. [2024-01-27 15:15:47,448 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 582 transitions, 10642 flow [2024-01-27 15:15:47,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:15:47,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:15:47,448 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:15:47,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-01-27 15:15:47,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:47,652 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:15:47,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:15:47,652 INFO L85 PathProgramCache]: Analyzing trace with hash -458636452, now seen corresponding path program 10 times [2024-01-27 15:15:47,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:15:47,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923782471] [2024-01-27 15:15:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:15:47,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:15:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:15:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:15:47,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:15:47,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923782471] [2024-01-27 15:15:47,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923782471] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:15:47,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6318579] [2024-01-27 15:15:47,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:15:47,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:47,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:15:47,931 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:15:47,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-01-27 15:15:48,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:15:48,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:15:48,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:15:48,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:15:48,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-27 15:15:48,275 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:15:48,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2024-01-27 15:15:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:15:48,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:15:48,506 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:15:48,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2024-01-27 15:15:48,566 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:15:48,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2024-01-27 15:15:48,642 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:15:48,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 194 [2024-01-27 15:15:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:15:48,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6318579] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:15:48,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:15:48,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 22 [2024-01-27 15:15:48,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065079561] [2024-01-27 15:15:48,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:15:48,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:15:48,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:15:48,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:15:48,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:15:48,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:15:48,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 582 transitions, 10642 flow. Second operand has 23 states, 23 states have (on average 7.391304347826087) internal successors, (170), 23 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:15:48,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:15:48,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:15:48,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:15:53,142 INFO L124 PetriNetUnfolderBase]: 6260/11525 cut-off events. [2024-01-27 15:15:53,142 INFO L125 PetriNetUnfolderBase]: For 311566/311569 co-relation queries the response was YES. [2024-01-27 15:15:53,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83940 conditions, 11525 events. 6260/11525 cut-off events. For 311566/311569 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 90267 event pairs, 1896 based on Foata normal form. 38/11559 useless extension candidates. Maximal degree in co-relation 83791. Up to 9538 conditions per place. [2024-01-27 15:15:53,263 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 547 selfloop transitions, 155 changer transitions 19/724 dead transitions. [2024-01-27 15:15:53,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 724 transitions, 14050 flow [2024-01-27 15:15:53,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 15:15:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 15:15:53,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 282 transitions. [2024-01-27 15:15:53,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051724137931034 [2024-01-27 15:15:53,264 INFO L175 Difference]: Start difference. First operand has 358 places, 582 transitions, 10642 flow. Second operand 24 states and 282 transitions. [2024-01-27 15:15:53,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 724 transitions, 14050 flow [2024-01-27 15:15:54,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 724 transitions, 13250 flow, removed 315 selfloop flow, removed 10 redundant places. [2024-01-27 15:15:54,937 INFO L231 Difference]: Finished difference. Result has 377 places, 618 transitions, 11238 flow [2024-01-27 15:15:54,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10014, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=11238, PETRI_PLACES=377, PETRI_TRANSITIONS=618} [2024-01-27 15:15:54,938 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 350 predicate places. [2024-01-27 15:15:54,939 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 618 transitions, 11238 flow [2024-01-27 15:15:54,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.391304347826087) internal successors, (170), 23 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:15:54,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:15:54,939 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:15:54,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-01-27 15:15:55,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:55,152 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:15:55,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:15:55,153 INFO L85 PathProgramCache]: Analyzing trace with hash -461369434, now seen corresponding path program 11 times [2024-01-27 15:15:55,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:15:55,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490674905] [2024-01-27 15:15:55,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:15:55,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:15:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:15:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:15:55,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:15:55,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490674905] [2024-01-27 15:15:55,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490674905] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:15:55,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86614192] [2024-01-27 15:15:55,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:15:55,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:55,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:15:55,528 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:15:55,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-01-27 15:15:55,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:15:55,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:15:55,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:15:55,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:15:55,862 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-01-27 15:15:55,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2024-01-27 15:15:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:15:55,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:15:55,992 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-01-27 15:15:55,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-01-27 15:15:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:15:56,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86614192] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:15:56,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:15:56,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2024-01-27 15:15:56,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964645176] [2024-01-27 15:15:56,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:15:56,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:15:56,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:15:56,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:15:56,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:15:56,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:15:56,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 618 transitions, 11238 flow. Second operand has 20 states, 20 states have (on average 7.9) internal successors, (158), 20 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 15:15:56,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:15:56,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:15:56,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:16:01,085 INFO L124 PetriNetUnfolderBase]: 7407/13638 cut-off events. [2024-01-27 15:16:01,085 INFO L125 PetriNetUnfolderBase]: For 475454/475457 co-relation queries the response was YES. [2024-01-27 15:16:01,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100800 conditions, 13638 events. 7407/13638 cut-off events. For 475454/475457 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 109696 event pairs, 1464 based on Foata normal form. 212/13846 useless extension candidates. Maximal degree in co-relation 100642. Up to 7158 conditions per place. [2024-01-27 15:16:01,227 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 645 selfloop transitions, 292 changer transitions 11/951 dead transitions. [2024-01-27 15:16:01,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 951 transitions, 18348 flow [2024-01-27 15:16:01,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-27 15:16:01,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-27 15:16:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 516 transitions. [2024-01-27 15:16:01,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4562334217506631 [2024-01-27 15:16:01,372 INFO L175 Difference]: Start difference. First operand has 377 places, 618 transitions, 11238 flow. Second operand 39 states and 516 transitions. [2024-01-27 15:16:01,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 951 transitions, 18348 flow [2024-01-27 15:16:03,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 951 transitions, 17837 flow, removed 157 selfloop flow, removed 15 redundant places. [2024-01-27 15:16:03,904 INFO L231 Difference]: Finished difference. Result has 410 places, 700 transitions, 13490 flow [2024-01-27 15:16:03,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10808, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=13490, PETRI_PLACES=410, PETRI_TRANSITIONS=700} [2024-01-27 15:16:03,905 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 383 predicate places. [2024-01-27 15:16:03,905 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 700 transitions, 13490 flow [2024-01-27 15:16:03,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.9) internal successors, (158), 20 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 15:16:03,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:16:03,906 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:16:03,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-01-27 15:16:04,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-01-27 15:16:04,120 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:16:04,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:16:04,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1385482166, now seen corresponding path program 11 times [2024-01-27 15:16:04,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:16:04,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212986834] [2024-01-27 15:16:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:16:04,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:16:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:16:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:16:04,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:16:04,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212986834] [2024-01-27 15:16:04,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212986834] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:16:04,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533845515] [2024-01-27 15:16:04,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:16:04,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:16:04,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:16:04,471 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:16:04,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-01-27 15:16:04,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:16:04,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:16:04,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:16:04,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:16:04,852 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-27 15:16:04,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2024-01-27 15:16:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:16:04,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:16:04,992 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-01-27 15:16:04,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-01-27 15:16:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:16:05,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533845515] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:16:05,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:16:05,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2024-01-27 15:16:05,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059326169] [2024-01-27 15:16:05,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:16:05,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:16:05,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:16:05,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:16:05,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:16:05,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:16:05,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 700 transitions, 13490 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 15:16:05,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:16:05,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:16:05,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:16:09,642 INFO L124 PetriNetUnfolderBase]: 7289/13428 cut-off events. [2024-01-27 15:16:09,642 INFO L125 PetriNetUnfolderBase]: For 522506/522509 co-relation queries the response was YES. [2024-01-27 15:16:09,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103569 conditions, 13428 events. 7289/13428 cut-off events. For 522506/522509 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 107806 event pairs, 1974 based on Foata normal form. 42/13466 useless extension candidates. Maximal degree in co-relation 103401. Up to 10263 conditions per place. [2024-01-27 15:16:09,783 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 547 selfloop transitions, 178 changer transitions 26/754 dead transitions. [2024-01-27 15:16:09,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 754 transitions, 15640 flow [2024-01-27 15:16:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:16:09,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:16:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 194 transitions. [2024-01-27 15:16:09,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41810344827586204 [2024-01-27 15:16:09,785 INFO L175 Difference]: Start difference. First operand has 410 places, 700 transitions, 13490 flow. Second operand 16 states and 194 transitions. [2024-01-27 15:16:09,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 754 transitions, 15640 flow [2024-01-27 15:16:13,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 754 transitions, 14599 flow, removed 318 selfloop flow, removed 17 redundant places. [2024-01-27 15:16:13,841 INFO L231 Difference]: Finished difference. Result has 410 places, 684 transitions, 12614 flow [2024-01-27 15:16:13,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=12360, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=12614, PETRI_PLACES=410, PETRI_TRANSITIONS=684} [2024-01-27 15:16:13,842 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 383 predicate places. [2024-01-27 15:16:13,842 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 684 transitions, 12614 flow [2024-01-27 15:16:13,843 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 15:16:13,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:16:13,843 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:16:13,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-01-27 15:16:14,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-01-27 15:16:14,057 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:16:14,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:16:14,057 INFO L85 PathProgramCache]: Analyzing trace with hash -626632590, now seen corresponding path program 12 times [2024-01-27 15:16:14,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:16:14,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539715219] [2024-01-27 15:16:14,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:16:14,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:16:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:16:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:16:14,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:16:14,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539715219] [2024-01-27 15:16:14,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539715219] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:16:14,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924193956] [2024-01-27 15:16:14,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:16:14,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:16:14,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:16:14,465 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:16:14,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-01-27 15:16:14,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:16:14,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:16:14,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:16:14,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:16:14,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:16:14,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-01-27 15:16:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:16:14,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:16:15,190 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-01-27 15:16:15,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-01-27 15:16:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:16:15,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924193956] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:16:15,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:16:15,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-01-27 15:16:15,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824281234] [2024-01-27 15:16:15,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:16:15,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:16:15,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:16:15,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:16:15,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:16:15,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:16:15,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 684 transitions, 12614 flow. Second operand has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:16:15,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:16:15,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:16:15,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:16:20,240 INFO L124 PetriNetUnfolderBase]: 6855/12592 cut-off events. [2024-01-27 15:16:20,240 INFO L125 PetriNetUnfolderBase]: For 512185/512188 co-relation queries the response was YES. [2024-01-27 15:16:20,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93182 conditions, 12592 events. 6855/12592 cut-off events. For 512185/512188 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 99634 event pairs, 1592 based on Foata normal form. 212/12800 useless extension candidates. Maximal degree in co-relation 93019. Up to 8710 conditions per place. [2024-01-27 15:16:20,375 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 567 selfloop transitions, 277 changer transitions 13/860 dead transitions. [2024-01-27 15:16:20,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 860 transitions, 16261 flow [2024-01-27 15:16:20,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-27 15:16:20,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-27 15:16:20,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 443 transitions. [2024-01-27 15:16:20,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3916887709991158 [2024-01-27 15:16:20,376 INFO L175 Difference]: Start difference. First operand has 410 places, 684 transitions, 12614 flow. Second operand 39 states and 443 transitions. [2024-01-27 15:16:20,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 860 transitions, 16261 flow [2024-01-27 15:16:23,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 860 transitions, 15775 flow, removed 70 selfloop flow, removed 16 redundant places. [2024-01-27 15:16:23,516 INFO L231 Difference]: Finished difference. Result has 433 places, 701 transitions, 13212 flow [2024-01-27 15:16:23,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=12070, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=13212, PETRI_PLACES=433, PETRI_TRANSITIONS=701} [2024-01-27 15:16:23,516 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 406 predicate places. [2024-01-27 15:16:23,516 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 701 transitions, 13212 flow [2024-01-27 15:16:23,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:16:23,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:16:23,517 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:16:23,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-01-27 15:16:23,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-01-27 15:16:23,720 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:16:23,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:16:23,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1344180918, now seen corresponding path program 12 times [2024-01-27 15:16:23,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:16:23,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285015344] [2024-01-27 15:16:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:16:23,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:16:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:16:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:16:24,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:16:24,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285015344] [2024-01-27 15:16:24,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285015344] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:16:24,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318744870] [2024-01-27 15:16:24,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:16:24,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:16:24,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:16:24,125 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:16:24,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-01-27 15:16:24,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:16:24,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:16:24,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:16:24,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:16:24,389 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 15:16:24,614 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:16:24,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-01-27 15:16:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:16:24,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:16:24,855 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:16:24,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2024-01-27 15:16:24,872 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:16:24,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2024-01-27 15:16:24,975 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:16:24,975 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 190 treesize of output 185 [2024-01-27 15:16:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:16:25,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318744870] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:16:25,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:16:25,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 23 [2024-01-27 15:16:25,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384515409] [2024-01-27 15:16:25,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:16:25,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:16:25,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:16:25,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:16:25,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:16:25,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:16:25,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 701 transitions, 13212 flow. Second operand has 24 states, 24 states have (on average 7.375) internal successors, (177), 24 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 15:16:25,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:16:25,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:16:25,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:16:29,801 INFO L124 PetriNetUnfolderBase]: 7395/13564 cut-off events. [2024-01-27 15:16:29,801 INFO L125 PetriNetUnfolderBase]: For 481081/481081 co-relation queries the response was YES. [2024-01-27 15:16:29,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102315 conditions, 13564 events. 7395/13564 cut-off events. For 481081/481081 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 108575 event pairs, 2212 based on Foata normal form. 16/13578 useless extension candidates. Maximal degree in co-relation 102151. Up to 11646 conditions per place. [2024-01-27 15:16:29,939 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 644 selfloop transitions, 172 changer transitions 17/836 dead transitions. [2024-01-27 15:16:29,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 836 transitions, 17065 flow [2024-01-27 15:16:29,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:16:29,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:16:29,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 256 transitions. [2024-01-27 15:16:29,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4012539184952978 [2024-01-27 15:16:29,940 INFO L175 Difference]: Start difference. First operand has 433 places, 701 transitions, 13212 flow. Second operand 22 states and 256 transitions. [2024-01-27 15:16:29,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 836 transitions, 17065 flow [2024-01-27 15:16:33,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 836 transitions, 16360 flow, removed 45 selfloop flow, removed 28 redundant places. [2024-01-27 15:16:33,037 INFO L231 Difference]: Finished difference. Result has 431 places, 751 transitions, 14514 flow [2024-01-27 15:16:33,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=12596, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=14514, PETRI_PLACES=431, PETRI_TRANSITIONS=751} [2024-01-27 15:16:33,037 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 404 predicate places. [2024-01-27 15:16:33,038 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 751 transitions, 14514 flow [2024-01-27 15:16:33,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.375) internal successors, (177), 24 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 15:16:33,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:16:33,038 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:16:33,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-01-27 15:16:33,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-01-27 15:16:33,240 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:16:33,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:16:33,241 INFO L85 PathProgramCache]: Analyzing trace with hash -607041226, now seen corresponding path program 13 times [2024-01-27 15:16:33,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:16:33,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423152156] [2024-01-27 15:16:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:16:33,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:16:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:16:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:16:33,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:16:33,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423152156] [2024-01-27 15:16:33,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423152156] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:16:33,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791406421] [2024-01-27 15:16:33,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:16:33,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:16:33,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:16:33,588 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:16:33,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-01-27 15:16:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:16:33,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 15:16:33,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:16:33,934 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-27 15:16:33,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2024-01-27 15:16:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:16:33,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:16:34,056 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-27 15:16:34,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-27 15:16:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 15:16:34,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791406421] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:16:34,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:16:34,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2024-01-27 15:16:34,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273154546] [2024-01-27 15:16:34,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:16:34,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:16:34,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:16:34,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:16:34,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:16:34,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:16:34,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 751 transitions, 14514 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 15:16:34,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:16:34,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:16:34,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:16:38,631 INFO L124 PetriNetUnfolderBase]: 7387/13559 cut-off events. [2024-01-27 15:16:38,631 INFO L125 PetriNetUnfolderBase]: For 466882/466882 co-relation queries the response was YES. [2024-01-27 15:16:38,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101730 conditions, 13559 events. 7387/13559 cut-off events. For 466882/466882 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 108614 event pairs, 2142 based on Foata normal form. 36/13593 useless extension candidates. Maximal degree in co-relation 101560. Up to 10525 conditions per place. [2024-01-27 15:16:38,777 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 613 selfloop transitions, 184 changer transitions 28/828 dead transitions. [2024-01-27 15:16:38,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 828 transitions, 17000 flow [2024-01-27 15:16:38,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:16:38,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:16:38,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 192 transitions. [2024-01-27 15:16:38,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4413793103448276 [2024-01-27 15:16:38,779 INFO L175 Difference]: Start difference. First operand has 431 places, 751 transitions, 14514 flow. Second operand 15 states and 192 transitions. [2024-01-27 15:16:38,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 828 transitions, 17000 flow [2024-01-27 15:16:42,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 828 transitions, 16363 flow, removed 288 selfloop flow, removed 9 redundant places. [2024-01-27 15:16:42,167 INFO L231 Difference]: Finished difference. Result has 439 places, 758 transitions, 14539 flow [2024-01-27 15:16:42,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=13885, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=14539, PETRI_PLACES=439, PETRI_TRANSITIONS=758} [2024-01-27 15:16:42,168 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 412 predicate places. [2024-01-27 15:16:42,168 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 758 transitions, 14539 flow [2024-01-27 15:16:42,168 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 15:16:42,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:16:42,169 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:16:42,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-01-27 15:16:42,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:16:42,373 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:16:42,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:16:42,374 INFO L85 PathProgramCache]: Analyzing trace with hash 526150820, now seen corresponding path program 13 times [2024-01-27 15:16:42,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:16:42,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491275463] [2024-01-27 15:16:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:16:42,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:16:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:16:42,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:16:42,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:16:42,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491275463] [2024-01-27 15:16:42,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491275463] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:16:42,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013619275] [2024-01-27 15:16:42,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:16:42,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:16:42,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:16:42,688 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:16:42,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-01-27 15:16:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:16:42,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 15:16:42,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:16:42,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:16:42,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-01-27 15:16:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:16:43,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:16:43,093 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-27 15:16:43,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-27 15:16:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 15:16:43,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013619275] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:16:43,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:16:43,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 16 [2024-01-27 15:16:43,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110081596] [2024-01-27 15:16:43,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:16:43,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:16:43,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:16:43,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:16:43,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:16:43,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:16:43,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 758 transitions, 14539 flow. Second operand has 17 states, 17 states have (on average 8.117647058823529) internal successors, (138), 17 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 15:16:43,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:16:43,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:16:43,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:16:47,978 INFO L124 PetriNetUnfolderBase]: 7295/13409 cut-off events. [2024-01-27 15:16:47,978 INFO L125 PetriNetUnfolderBase]: For 424561/424564 co-relation queries the response was YES. [2024-01-27 15:16:48,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99040 conditions, 13409 events. 7295/13409 cut-off events. For 424561/424564 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 107419 event pairs, 1968 based on Foata normal form. 50/13455 useless extension candidates. Maximal degree in co-relation 98867. Up to 10240 conditions per place. [2024-01-27 15:16:48,124 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 622 selfloop transitions, 205 changer transitions 17/847 dead transitions. [2024-01-27 15:16:48,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 847 transitions, 17371 flow [2024-01-27 15:16:48,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:16:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:16:48,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 223 transitions. [2024-01-27 15:16:48,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4272030651340996 [2024-01-27 15:16:48,125 INFO L175 Difference]: Start difference. First operand has 439 places, 758 transitions, 14539 flow. Second operand 18 states and 223 transitions. [2024-01-27 15:16:48,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 847 transitions, 17371 flow [2024-01-27 15:16:50,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 847 transitions, 16725 flow, removed 139 selfloop flow, removed 13 redundant places. [2024-01-27 15:16:50,989 INFO L231 Difference]: Finished difference. Result has 445 places, 769 transitions, 14808 flow [2024-01-27 15:16:50,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14079, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=14808, PETRI_PLACES=445, PETRI_TRANSITIONS=769} [2024-01-27 15:16:50,989 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 418 predicate places. [2024-01-27 15:16:50,990 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 769 transitions, 14808 flow [2024-01-27 15:16:50,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.117647058823529) internal successors, (138), 17 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 15:16:50,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:16:50,990 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:16:51,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-01-27 15:16:51,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2024-01-27 15:16:51,191 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:16:51,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:16:51,191 INFO L85 PathProgramCache]: Analyzing trace with hash 850937862, now seen corresponding path program 14 times [2024-01-27 15:16:51,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:16:51,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842367548] [2024-01-27 15:16:51,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:16:51,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:16:51,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:16:51,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:16:51,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:16:51,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842367548] [2024-01-27 15:16:51,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842367548] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:16:51,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651834636] [2024-01-27 15:16:51,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:16:51,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:16:51,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:16:51,468 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:16:51,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-01-27 15:16:51,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:16:51,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:16:51,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:16:51,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:16:51,779 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-27 15:16:51,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-01-27 15:16:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:16:51,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:16:51,878 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-27 15:16:51,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-27 15:16:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 15:16:51,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651834636] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:16:51,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:16:51,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 6] total 15 [2024-01-27 15:16:51,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792876492] [2024-01-27 15:16:51,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:16:51,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:16:51,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:16:51,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:16:51,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:16:51,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:16:51,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 769 transitions, 14808 flow. Second operand has 16 states, 16 states have (on average 7.75) internal successors, (124), 16 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 15:16:51,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:16:51,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:16:51,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:16:56,823 INFO L124 PetriNetUnfolderBase]: 7455/13687 cut-off events. [2024-01-27 15:16:56,823 INFO L125 PetriNetUnfolderBase]: For 429038/429038 co-relation queries the response was YES. [2024-01-27 15:16:56,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101634 conditions, 13687 events. 7455/13687 cut-off events. For 429038/429038 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 109664 event pairs, 1950 based on Foata normal form. 72/13757 useless extension candidates. Maximal degree in co-relation 101461. Up to 9291 conditions per place. [2024-01-27 15:16:56,969 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 590 selfloop transitions, 282 changer transitions 3/878 dead transitions. [2024-01-27 15:16:56,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 878 transitions, 18277 flow [2024-01-27 15:16:56,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:16:56,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:16:56,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 223 transitions. [2024-01-27 15:16:56,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45233265720081134 [2024-01-27 15:16:56,970 INFO L175 Difference]: Start difference. First operand has 445 places, 769 transitions, 14808 flow. Second operand 17 states and 223 transitions. [2024-01-27 15:16:56,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 878 transitions, 18277 flow [2024-01-27 15:16:59,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 878 transitions, 17888 flow, removed 35 selfloop flow, removed 13 redundant places. [2024-01-27 15:16:59,684 INFO L231 Difference]: Finished difference. Result has 451 places, 786 transitions, 15491 flow [2024-01-27 15:16:59,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14427, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=15491, PETRI_PLACES=451, PETRI_TRANSITIONS=786} [2024-01-27 15:16:59,684 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 424 predicate places. [2024-01-27 15:16:59,685 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 786 transitions, 15491 flow [2024-01-27 15:16:59,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.75) internal successors, (124), 16 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 15:16:59,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:16:59,685 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:16:59,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-01-27 15:16:59,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-01-27 15:16:59,885 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:16:59,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:16:59,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1883158712, now seen corresponding path program 14 times [2024-01-27 15:16:59,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:16:59,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316652877] [2024-01-27 15:16:59,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:16:59,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:16:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:17:00,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:00,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316652877] [2024-01-27 15:17:00,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316652877] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:00,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060868055] [2024-01-27 15:17:00,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:17:00,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:00,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:17:00,178 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:17:00,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-01-27 15:17:00,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:17:00,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:17:00,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-27 15:17:00,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:17:00,478 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 15:17:00,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:17:00,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-01-27 15:17:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:17:00,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:17:00,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:17:00,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2024-01-27 15:17:00,817 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:17:00,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2024-01-27 15:17:00,907 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-27 15:17:00,907 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 190 treesize of output 185 [2024-01-27 15:17:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:17:01,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060868055] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:17:01,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:17:01,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 9] total 20 [2024-01-27 15:17:01,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734196208] [2024-01-27 15:17:01,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:17:01,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:17:01,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:01,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:17:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:17:01,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:17:01,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 786 transitions, 15491 flow. Second operand has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:17:01,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:01,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:17:01,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand