./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.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 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:47:42,151 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:47:42,214 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:47:42,218 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:47:42,218 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:47:42,241 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:47:42,241 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:47:42,241 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:47:42,242 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:47:42,245 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:47:42,245 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:47:42,245 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:47:42,246 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:47:42,247 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:47:42,247 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:47:42,247 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:47:42,248 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:47:42,248 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:47:42,248 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:47:42,248 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:47:42,248 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:47:42,249 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:47:42,249 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:47:42,249 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:47:42,249 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:47:42,250 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:47:42,250 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:47:42,250 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:47:42,251 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:47:42,251 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:47:42,252 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:47:42,252 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:47:42,252 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:47:42,252 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:47:42,252 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:47:42,252 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:47:42,253 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:47:42,253 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:47:42,253 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:47:42,253 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:47:42,253 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:47:42,254 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:47:42,254 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:47:42,254 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 [2024-06-27 16:47:42,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:47:42,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:47:42,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:47:42,479 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:47:42,479 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:47:42,480 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-06-27 16:47:43,624 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:47:43,780 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:47:43,781 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-06-27 16:47:43,787 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4d9c101f/c9c20d00b88c4cbbb72eadb4ca0d1ab0/FLAG022e69ae5 [2024-06-27 16:47:43,798 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4d9c101f/c9c20d00b88c4cbbb72eadb4ca0d1ab0 [2024-06-27 16:47:43,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:47:43,802 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:47:43,804 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:47:43,805 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:47:43,809 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:47:43,809 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:47:43" (1/1) ... [2024-06-27 16:47:43,810 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b381e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:43, skipping insertion in model container [2024-06-27 16:47:43,810 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:47:43" (1/1) ... [2024-06-27 16:47:43,829 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:47:44,024 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c[2451,2464] [2024-06-27 16:47:44,036 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:47:44,041 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:47:44,056 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c[2451,2464] [2024-06-27 16:47:44,059 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:47:44,075 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:47:44,075 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:44 WrapperNode [2024-06-27 16:47:44,076 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:47:44,077 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:47:44,077 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:47:44,077 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:47:44,082 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:44" (1/1) ... [2024-06-27 16:47:44,089 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:44" (1/1) ... [2024-06-27 16:47:44,109 INFO L138 Inliner]: procedures = 25, calls = 30, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 265 [2024-06-27 16:47:44,110 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:47:44,110 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:47:44,110 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:47:44,111 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:47:44,118 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:44" (1/1) ... [2024-06-27 16:47:44,118 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:44" (1/1) ... [2024-06-27 16:47:44,122 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:44" (1/1) ... [2024-06-27 16:47:44,134 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-06-27 16:47:44,135 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:44" (1/1) ... [2024-06-27 16:47:44,135 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:44" (1/1) ... [2024-06-27 16:47:44,141 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:44" (1/1) ... [2024-06-27 16:47:44,144 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:44" (1/1) ... [2024-06-27 16:47:44,146 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:44" (1/1) ... [2024-06-27 16:47:44,147 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:44" (1/1) ... [2024-06-27 16:47:44,150 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:47:44,151 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:47:44,151 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:47:44,151 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:47:44,152 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:44" (1/1) ... [2024-06-27 16:47:44,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:47:44,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:44,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 16:47:44,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 16:47:44,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:47:44,246 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:47:44,246 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:47:44,246 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:47:44,246 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:47:44,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 16:47:44,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 16:47:44,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:47:44,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:47:44,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:47:44,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:47:44,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:47:44,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:47:44,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:47:44,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:47:44,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:47:44,250 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:47:44,360 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:47:44,361 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:47:44,651 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:47:44,652 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:47:45,003 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:47:45,004 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-06-27 16:47:45,004 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:47:45 BoogieIcfgContainer [2024-06-27 16:47:45,005 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:47:45,007 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:47:45,007 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:47:45,009 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:47:45,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:47:43" (1/3) ... [2024-06-27 16:47:45,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4d9bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:47:45, skipping insertion in model container [2024-06-27 16:47:45,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:47:44" (2/3) ... [2024-06-27 16:47:45,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4d9bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:47:45, skipping insertion in model container [2024-06-27 16:47:45,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:47:45" (3/3) ... [2024-06-27 16:47:45,014 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2024-06-27 16:47:45,021 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:47:45,028 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:47:45,029 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:47:45,029 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:47:45,084 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-27 16:47:45,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 31 transitions, 83 flow [2024-06-27 16:47:45,152 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2024-06-27 16:47:45,153 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:47:45,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 6/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-06-27 16:47:45,157 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 31 transitions, 83 flow [2024-06-27 16:47:45,159 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 72 flow [2024-06-27 16:47:45,171 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:47:45,177 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;@5b753be6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:47:45,177 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 16:47:45,191 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:47:45,191 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2024-06-27 16:47:45,191 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:47:45,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:45,192 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] [2024-06-27 16:47:45,192 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:47:45,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:45,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1078802292, now seen corresponding path program 1 times [2024-06-27 16:47:45,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:45,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040463273] [2024-06-27 16:47:45,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:45,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:45,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:45,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040463273] [2024-06-27 16:47:45,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040463273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:47:45,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:47:45,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:47:45,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039878108] [2024-06-27 16:47:45,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:47:45,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:47:45,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:45,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:47:45,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:47:45,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:47:45,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:45,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:45,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:47:45,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:45,841 INFO L124 PetriNetUnfolderBase]: 389/571 cut-off events. [2024-06-27 16:47:45,841 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-06-27 16:47:45,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 571 events. 389/571 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1803 event pairs, 124 based on Foata normal form. 1/419 useless extension candidates. Maximal degree in co-relation 1030. Up to 349 conditions per place. [2024-06-27 16:47:45,846 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 38 selfloop transitions, 4 changer transitions 1/44 dead transitions. [2024-06-27 16:47:45,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 207 flow [2024-06-27 16:47:45,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:47:45,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:47:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2024-06-27 16:47:45,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6021505376344086 [2024-06-27 16:47:45,857 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 72 flow. Second operand 3 states and 56 transitions. [2024-06-27 16:47:45,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 207 flow [2024-06-27 16:47:45,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 44 transitions, 185 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 16:47:45,862 INFO L231 Difference]: Finished difference. Result has 28 places, 30 transitions, 86 flow [2024-06-27 16:47:45,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=28, PETRI_TRANSITIONS=30} [2024-06-27 16:47:45,865 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2024-06-27 16:47:45,865 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 30 transitions, 86 flow [2024-06-27 16:47:45,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:45,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:45,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:45,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:47:45,866 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:47:45,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:45,867 INFO L85 PathProgramCache]: Analyzing trace with hash -440324353, now seen corresponding path program 1 times [2024-06-27 16:47:45,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:45,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244016543] [2024-06-27 16:47:45,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:45,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:46,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:46,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244016543] [2024-06-27 16:47:46,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244016543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:47:46,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:47:46,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:47:46,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356740149] [2024-06-27 16:47:46,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:47:46,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:47:46,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:46,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:47:46,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:47:46,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:47:46,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 30 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:46,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:46,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:47:46,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:46,264 INFO L124 PetriNetUnfolderBase]: 711/1066 cut-off events. [2024-06-27 16:47:46,264 INFO L125 PetriNetUnfolderBase]: For 212/212 co-relation queries the response was YES. [2024-06-27 16:47:46,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2551 conditions, 1066 events. 711/1066 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3820 event pairs, 401 based on Foata normal form. 46/1102 useless extension candidates. Maximal degree in co-relation 926. Up to 571 conditions per place. [2024-06-27 16:47:46,271 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 61 selfloop transitions, 15 changer transitions 0/77 dead transitions. [2024-06-27 16:47:46,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 77 transitions, 362 flow [2024-06-27 16:47:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:47:46,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:47:46,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-06-27 16:47:46,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053763440860215 [2024-06-27 16:47:46,275 INFO L175 Difference]: Start difference. First operand has 28 places, 30 transitions, 86 flow. Second operand 6 states and 94 transitions. [2024-06-27 16:47:46,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 77 transitions, 362 flow [2024-06-27 16:47:46,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 77 transitions, 354 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 16:47:46,280 INFO L231 Difference]: Finished difference. Result has 36 places, 43 transitions, 186 flow [2024-06-27 16:47:46,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=36, PETRI_TRANSITIONS=43} [2024-06-27 16:47:46,281 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2024-06-27 16:47:46,281 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 43 transitions, 186 flow [2024-06-27 16:47:46,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:46,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:46,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:46,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:47:46,283 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:47:46,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:46,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1098836768, now seen corresponding path program 1 times [2024-06-27 16:47:46,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:46,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897086622] [2024-06-27 16:47:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:46,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:46,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:46,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897086622] [2024-06-27 16:47:46,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897086622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:47:46,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:47:46,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:47:46,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994257653] [2024-06-27 16:47:46,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:47:46,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:47:46,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:46,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:47:46,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:47:46,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:47:46,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 43 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:46,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:46,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:47:46,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:46,573 INFO L124 PetriNetUnfolderBase]: 619/947 cut-off events. [2024-06-27 16:47:46,573 INFO L125 PetriNetUnfolderBase]: For 573/573 co-relation queries the response was YES. [2024-06-27 16:47:46,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 947 events. 619/947 cut-off events. For 573/573 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3342 event pairs, 372 based on Foata normal form. 41/985 useless extension candidates. Maximal degree in co-relation 1459. Up to 571 conditions per place. [2024-06-27 16:47:46,577 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 56 selfloop transitions, 15 changer transitions 0/72 dead transitions. [2024-06-27 16:47:46,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 72 transitions, 424 flow [2024-06-27 16:47:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:47:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:47:46,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-06-27 16:47:46,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.489247311827957 [2024-06-27 16:47:46,579 INFO L175 Difference]: Start difference. First operand has 36 places, 43 transitions, 186 flow. Second operand 6 states and 91 transitions. [2024-06-27 16:47:46,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 72 transitions, 424 flow [2024-06-27 16:47:46,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 72 transitions, 424 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 16:47:46,583 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 237 flow [2024-06-27 16:47:46,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=237, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2024-06-27 16:47:46,584 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2024-06-27 16:47:46,584 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 237 flow [2024-06-27 16:47:46,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:46,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:46,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:46,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:47:46,585 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:47:46,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:46,586 INFO L85 PathProgramCache]: Analyzing trace with hash -688183846, now seen corresponding path program 1 times [2024-06-27 16:47:46,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:46,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886443412] [2024-06-27 16:47:46,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:46,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:46,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:46,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886443412] [2024-06-27 16:47:46,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886443412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:47:46,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:47:46,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:47:46,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799550354] [2024-06-27 16:47:46,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:47:46,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:47:46,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:46,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:47:46,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:47:46,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:47:46,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 237 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:46,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:46,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:47:46,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:46,804 INFO L124 PetriNetUnfolderBase]: 519/800 cut-off events. [2024-06-27 16:47:46,805 INFO L125 PetriNetUnfolderBase]: For 805/805 co-relation queries the response was YES. [2024-06-27 16:47:46,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2369 conditions, 800 events. 519/800 cut-off events. For 805/805 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2661 event pairs, 333 based on Foata normal form. 22/819 useless extension candidates. Maximal degree in co-relation 1617. Up to 571 conditions per place. [2024-06-27 16:47:46,808 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 26 selfloop transitions, 6 changer transitions 33/66 dead transitions. [2024-06-27 16:47:46,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 66 transitions, 445 flow [2024-06-27 16:47:46,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:47:46,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:47:46,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 87 transitions. [2024-06-27 16:47:46,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46774193548387094 [2024-06-27 16:47:46,809 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 237 flow. Second operand 6 states and 87 transitions. [2024-06-27 16:47:46,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 66 transitions, 445 flow [2024-06-27 16:47:46,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 66 transitions, 424 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 16:47:46,812 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 154 flow [2024-06-27 16:47:46,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2024-06-27 16:47:46,813 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 16 predicate places. [2024-06-27 16:47:46,813 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 154 flow [2024-06-27 16:47:46,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:46,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:46,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:46,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:47:46,814 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:47:46,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:46,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1253641488, now seen corresponding path program 1 times [2024-06-27 16:47:46,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:46,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860509889] [2024-06-27 16:47:46,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:46,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:46,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:46,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860509889] [2024-06-27 16:47:46,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860509889] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:46,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657476128] [2024-06-27 16:47:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:46,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:46,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:46,889 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:47:46,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 16:47:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:46,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:47:46,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:47,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:47,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657476128] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:47,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:47:47,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-06-27 16:47:47,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444471891] [2024-06-27 16:47:47,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:47:47,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:47:47,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:47,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:47:47,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:47:47,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:47:47,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:47,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:47,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:47:47,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:47,246 INFO L124 PetriNetUnfolderBase]: 377/554 cut-off events. [2024-06-27 16:47:47,247 INFO L125 PetriNetUnfolderBase]: For 549/549 co-relation queries the response was YES. [2024-06-27 16:47:47,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1734 conditions, 554 events. 377/554 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1684 event pairs, 150 based on Foata normal form. 50/603 useless extension candidates. Maximal degree in co-relation 1686. Up to 385 conditions per place. [2024-06-27 16:47:47,255 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 40 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2024-06-27 16:47:47,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 46 transitions, 298 flow [2024-06-27 16:47:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:47:47,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:47:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-06-27 16:47:47,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-27 16:47:47,257 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 154 flow. Second operand 5 states and 59 transitions. [2024-06-27 16:47:47,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 46 transitions, 298 flow [2024-06-27 16:47:47,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 46 transitions, 234 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-27 16:47:47,262 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 127 flow [2024-06-27 16:47:47,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2024-06-27 16:47:47,266 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2024-06-27 16:47:47,266 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 127 flow [2024-06-27 16:47:47,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:47,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:47,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:47,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 16:47:47,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:47,479 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:47:47,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:47,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1836217093, now seen corresponding path program 1 times [2024-06-27 16:47:47,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:47,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56783416] [2024-06-27 16:47:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:47,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:47,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:47,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56783416] [2024-06-27 16:47:47,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56783416] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:47,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811775014] [2024-06-27 16:47:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:47,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:47,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:47,560 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:47:47,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 16:47:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:47,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:47:47,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:47,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:47,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811775014] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:47,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:47:47,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-06-27 16:47:47,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588458432] [2024-06-27 16:47:47,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:47:47,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:47:47,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:47,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:47:47,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:47:47,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:47:47,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:47,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:47,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:47:47,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:47,815 INFO L124 PetriNetUnfolderBase]: 383/560 cut-off events. [2024-06-27 16:47:47,815 INFO L125 PetriNetUnfolderBase]: For 377/377 co-relation queries the response was YES. [2024-06-27 16:47:47,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1557 conditions, 560 events. 383/560 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1675 event pairs, 164 based on Foata normal form. 42/599 useless extension candidates. Maximal degree in co-relation 1518. Up to 418 conditions per place. [2024-06-27 16:47:47,819 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 43 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2024-06-27 16:47:47,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 49 transitions, 280 flow [2024-06-27 16:47:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:47:47,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:47:47,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-06-27 16:47:47,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-27 16:47:47,821 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 127 flow. Second operand 5 states and 60 transitions. [2024-06-27 16:47:47,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 49 transitions, 280 flow [2024-06-27 16:47:47,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 49 transitions, 262 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 16:47:47,823 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 137 flow [2024-06-27 16:47:47,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2024-06-27 16:47:47,825 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-06-27 16:47:47,825 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 137 flow [2024-06-27 16:47:47,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:47,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:47,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:47,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 16:47:48,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-06-27 16:47:48,038 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:47:48,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:48,038 INFO L85 PathProgramCache]: Analyzing trace with hash -2094722590, now seen corresponding path program 1 times [2024-06-27 16:47:48,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:48,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432723046] [2024-06-27 16:47:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:48,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:48,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:48,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:47:48,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:48,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432723046] [2024-06-27 16:47:48,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432723046] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:48,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272728367] [2024-06-27 16:47:48,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:48,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:48,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:48,149 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:47:48,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 16:47:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:48,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:47:48,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:47:48,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:47:48,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272728367] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:48,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:47:48,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-06-27 16:47:48,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115579468] [2024-06-27 16:47:48,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:47:48,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:47:48,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:48,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:47:48,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:47:48,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:47:48,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 137 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:48,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:48,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:47:48,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:48,476 INFO L124 PetriNetUnfolderBase]: 432/630 cut-off events. [2024-06-27 16:47:48,476 INFO L125 PetriNetUnfolderBase]: For 598/598 co-relation queries the response was YES. [2024-06-27 16:47:48,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1888 conditions, 630 events. 432/630 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1876 event pairs, 202 based on Foata normal form. 37/664 useless extension candidates. Maximal degree in co-relation 1848. Up to 502 conditions per place. [2024-06-27 16:47:48,479 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 43 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2024-06-27 16:47:48,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 49 transitions, 296 flow [2024-06-27 16:47:48,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:47:48,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:47:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2024-06-27 16:47:48,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-27 16:47:48,481 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 137 flow. Second operand 5 states and 58 transitions. [2024-06-27 16:47:48,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 49 transitions, 296 flow [2024-06-27 16:47:48,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 278 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 16:47:48,482 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 147 flow [2024-06-27 16:47:48,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-06-27 16:47:48,484 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2024-06-27 16:47:48,484 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 147 flow [2024-06-27 16:47:48,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:48,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:48,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:48,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 16:47:48,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:48,696 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:47:48,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:48,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1507050994, now seen corresponding path program 1 times [2024-06-27 16:47:48,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:48,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151605922] [2024-06-27 16:47:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:48,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:47:49,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:49,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151605922] [2024-06-27 16:47:49,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151605922] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:49,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358148714] [2024-06-27 16:47:49,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:49,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:49,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:49,505 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:47:49,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 16:47:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:49,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2024-06-27 16:47:49,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:49,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:47:49,679 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:47:49,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 16:47:49,878 INFO L349 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2024-06-27 16:47:49,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-06-27 16:47:49,954 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 28 treesize of output 12 [2024-06-27 16:47:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:49,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:54,013 WARN L854 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (~B~0.offset Int)) (let ((.cse2 (* 4 |c_thread3Thread1of1ForFork0_~i~2#1|))) (let ((.cse0 (select (select |c_#memory_int#1| c_~B~0.base) (+ .cse2 ~B~0.offset))) (.cse1 (select (select |c_#memory_int#1| c_~A~0.base) (+ .cse2 c_~A~0.offset)))) (= (+ .cse0 c_~csum~0 .cse1) (+ c_~asum~0 c_~bsum~0 (select (select (store |c_#memory_int#1| c_~C~0.base (store (select |c_#memory_int#1| c_~C~0.base) (+ .cse2 ~C~0.offset) (+ .cse0 .cse1))) c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) ~B~0.offset))))))) is different from false [2024-06-27 16:47:58,038 WARN L854 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (~B~0.offset Int)) (let ((.cse0 (select (select |c_#memory_int#1| c_~A~0.base) c_~A~0.offset)) (.cse1 (select (select |c_#memory_int#1| c_~B~0.base) ~B~0.offset))) (= (+ c_~csum~0 .cse0 .cse1) (+ c_~asum~0 c_~bsum~0 (select (select (store |c_#memory_int#1| c_~C~0.base (store (select |c_#memory_int#1| c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) ~B~0.offset)))))) is different from false [2024-06-27 16:47:58,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:58,153 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 52 treesize of output 40 [2024-06-27 16:47:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2024-06-27 16:47:58,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358148714] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:58,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:58,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2024-06-27 16:47:58,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706072066] [2024-06-27 16:47:58,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:58,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:47:58,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:58,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:47:58,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=658, Unknown=2, NotChecked=106, Total=870 [2024-06-27 16:47:58,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:47:58,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 147 flow. Second operand has 30 states, 30 states have (on average 6.2) internal successors, (186), 30 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:58,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:58,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:47:58,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:59,266 INFO L124 PetriNetUnfolderBase]: 618/900 cut-off events. [2024-06-27 16:47:59,267 INFO L125 PetriNetUnfolderBase]: For 693/693 co-relation queries the response was YES. [2024-06-27 16:47:59,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2850 conditions, 900 events. 618/900 cut-off events. For 693/693 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3036 event pairs, 27 based on Foata normal form. 1/898 useless extension candidates. Maximal degree in co-relation 2809. Up to 659 conditions per place. [2024-06-27 16:47:59,271 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 65 selfloop transitions, 30 changer transitions 1/97 dead transitions. [2024-06-27 16:47:59,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 97 transitions, 573 flow [2024-06-27 16:47:59,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:47:59,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:47:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 146 transitions. [2024-06-27 16:47:59,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36228287841191065 [2024-06-27 16:47:59,273 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 147 flow. Second operand 13 states and 146 transitions. [2024-06-27 16:47:59,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 97 transitions, 573 flow [2024-06-27 16:47:59,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 97 transitions, 546 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 16:47:59,275 INFO L231 Difference]: Finished difference. Result has 52 places, 56 transitions, 328 flow [2024-06-27 16:47:59,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=328, PETRI_PLACES=52, PETRI_TRANSITIONS=56} [2024-06-27 16:47:59,276 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 21 predicate places. [2024-06-27 16:47:59,276 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 56 transitions, 328 flow [2024-06-27 16:47:59,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.2) internal successors, (186), 30 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:59,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:59,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:59,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 16:47:59,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:59,492 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:47:59,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:59,492 INFO L85 PathProgramCache]: Analyzing trace with hash 219702430, now seen corresponding path program 2 times [2024-06-27 16:47:59,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:59,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408326394] [2024-06-27 16:47:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:59,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:48:00,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:48:00,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:48:00,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408326394] [2024-06-27 16:48:00,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408326394] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:48:00,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85910887] [2024-06-27 16:48:00,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:48:00,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:00,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:48:00,026 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:48:00,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 16:48:00,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:48:00,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:48:00,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:48:00,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:48:00,601 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:00,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-06-27 16:48:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:48:00,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:48:00,727 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:00,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2024-06-27 16:48:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:48:00,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85910887] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:48:00,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:48:00,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 23 [2024-06-27 16:48:00,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855321648] [2024-06-27 16:48:00,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:48:00,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:48:00,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:48:00,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:48:00,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:48:00,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:48:00,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 56 transitions, 328 flow. Second operand has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:48:00,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:48:00,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:48:00,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:48:01,380 INFO L124 PetriNetUnfolderBase]: 720/1047 cut-off events. [2024-06-27 16:48:01,381 INFO L125 PetriNetUnfolderBase]: For 1418/1418 co-relation queries the response was YES. [2024-06-27 16:48:01,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3924 conditions, 1047 events. 720/1047 cut-off events. For 1418/1418 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3589 event pairs, 117 based on Foata normal form. 1/1048 useless extension candidates. Maximal degree in co-relation 3874. Up to 894 conditions per place. [2024-06-27 16:48:01,386 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 74 selfloop transitions, 30 changer transitions 1/106 dead transitions. [2024-06-27 16:48:01,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 106 transitions, 782 flow [2024-06-27 16:48:01,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:48:01,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:48:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-27 16:48:01,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-27 16:48:01,388 INFO L175 Difference]: Start difference. First operand has 52 places, 56 transitions, 328 flow. Second operand 10 states and 118 transitions. [2024-06-27 16:48:01,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 106 transitions, 782 flow [2024-06-27 16:48:01,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 106 transitions, 721 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 16:48:01,391 INFO L231 Difference]: Finished difference. Result has 65 places, 79 transitions, 540 flow [2024-06-27 16:48:01,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=540, PETRI_PLACES=65, PETRI_TRANSITIONS=79} [2024-06-27 16:48:01,392 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 34 predicate places. [2024-06-27 16:48:01,392 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 79 transitions, 540 flow [2024-06-27 16:48:01,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:48:01,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:48:01,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:48:01,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-06-27 16:48:01,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:01,604 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:48:01,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:48:01,604 INFO L85 PathProgramCache]: Analyzing trace with hash 385013276, now seen corresponding path program 3 times [2024-06-27 16:48:01,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:48:01,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770296887] [2024-06-27 16:48:01,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:48:01,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:48:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:48:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:48:02,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:48:02,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770296887] [2024-06-27 16:48:02,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770296887] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:48:02,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163343196] [2024-06-27 16:48:02,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:48:02,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:02,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:48:02,253 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:48:02,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 16:48:02,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:48:02,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:48:02,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:48:02,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:48:02,715 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:02,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-06-27 16:48:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:48:02,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:48:02,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:02,850 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 38 treesize of output 87 [2024-06-27 16:48:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:48:03,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163343196] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:48:03,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:48:03,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 25 [2024-06-27 16:48:03,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868497633] [2024-06-27 16:48:03,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:48:03,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:48:03,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:48:03,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:48:03,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:48:03,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:48:03,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 79 transitions, 540 flow. Second operand has 26 states, 26 states have (on average 6.615384615384615) internal successors, (172), 26 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:48:03,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:48:03,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:48:03,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:48:03,886 INFO L124 PetriNetUnfolderBase]: 841/1221 cut-off events. [2024-06-27 16:48:03,887 INFO L125 PetriNetUnfolderBase]: For 2555/2555 co-relation queries the response was YES. [2024-06-27 16:48:03,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5052 conditions, 1221 events. 841/1221 cut-off events. For 2555/2555 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4305 event pairs, 144 based on Foata normal form. 1/1222 useless extension candidates. Maximal degree in co-relation 4998. Up to 1045 conditions per place. [2024-06-27 16:48:03,893 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 84 selfloop transitions, 45 changer transitions 1/131 dead transitions. [2024-06-27 16:48:03,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 131 transitions, 1077 flow [2024-06-27 16:48:03,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:48:03,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:48:03,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 138 transitions. [2024-06-27 16:48:03,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3424317617866005 [2024-06-27 16:48:03,895 INFO L175 Difference]: Start difference. First operand has 65 places, 79 transitions, 540 flow. Second operand 13 states and 138 transitions. [2024-06-27 16:48:03,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 131 transitions, 1077 flow [2024-06-27 16:48:03,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 131 transitions, 1041 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-27 16:48:03,901 INFO L231 Difference]: Finished difference. Result has 81 places, 99 transitions, 823 flow [2024-06-27 16:48:03,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=823, PETRI_PLACES=81, PETRI_TRANSITIONS=99} [2024-06-27 16:48:03,902 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2024-06-27 16:48:03,902 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 99 transitions, 823 flow [2024-06-27 16:48:03,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.615384615384615) internal successors, (172), 26 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:48:03,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:48:03,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:48:03,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 16:48:04,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:04,115 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:48:04,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:48:04,115 INFO L85 PathProgramCache]: Analyzing trace with hash -301183130, now seen corresponding path program 4 times [2024-06-27 16:48:04,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:48:04,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197195206] [2024-06-27 16:48:04,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:48:04,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:48:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:48:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:48:04,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:48:04,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197195206] [2024-06-27 16:48:04,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197195206] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:48:04,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678315730] [2024-06-27 16:48:04,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:48:04,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:04,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:48:04,754 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:48:04,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 16:48:04,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:48:04,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:48:04,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:48:04,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:48:05,078 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:05,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2024-06-27 16:48:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:48:05,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:48:49,332 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:49,333 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 38 treesize of output 87 [2024-06-27 16:48:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:48:49,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678315730] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:48:49,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:48:49,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2024-06-27 16:48:49,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048516215] [2024-06-27 16:48:49,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:48:49,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:48:49,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:48:49,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:48:49,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=460, Unknown=10, NotChecked=0, Total=552 [2024-06-27 16:48:49,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:48:49,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 99 transitions, 823 flow. Second operand has 24 states, 24 states have (on average 6.833333333333333) internal successors, (164), 24 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:48:49,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:48:49,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:48:49,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:48:50,437 INFO L124 PetriNetUnfolderBase]: 952/1381 cut-off events. [2024-06-27 16:48:50,438 INFO L125 PetriNetUnfolderBase]: For 4358/4358 co-relation queries the response was YES. [2024-06-27 16:48:50,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6241 conditions, 1381 events. 952/1381 cut-off events. For 4358/4358 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4972 event pairs, 214 based on Foata normal form. 1/1382 useless extension candidates. Maximal degree in co-relation 6175. Up to 1200 conditions per place. [2024-06-27 16:48:50,447 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 89 selfloop transitions, 54 changer transitions 1/145 dead transitions. [2024-06-27 16:48:50,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 145 transitions, 1400 flow [2024-06-27 16:48:50,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:48:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:48:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 134 transitions. [2024-06-27 16:48:50,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3325062034739454 [2024-06-27 16:48:50,448 INFO L175 Difference]: Start difference. First operand has 81 places, 99 transitions, 823 flow. Second operand 13 states and 134 transitions. [2024-06-27 16:48:50,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 145 transitions, 1400 flow [2024-06-27 16:48:50,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 145 transitions, 1312 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 16:48:50,503 INFO L231 Difference]: Finished difference. Result has 93 places, 118 transitions, 1121 flow [2024-06-27 16:48:50,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1121, PETRI_PLACES=93, PETRI_TRANSITIONS=118} [2024-06-27 16:48:50,504 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 62 predicate places. [2024-06-27 16:48:50,504 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 118 transitions, 1121 flow [2024-06-27 16:48:50,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.833333333333333) internal successors, (164), 24 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:48:50,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:48:50,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:48:50,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 16:48:50,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:50,716 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:48:50,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:48:50,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1780547664, now seen corresponding path program 5 times [2024-06-27 16:48:50,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:48:50,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488333628] [2024-06-27 16:48:50,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:48:50,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:48:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:48:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:48:51,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:48:51,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488333628] [2024-06-27 16:48:51,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488333628] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:48:51,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131690538] [2024-06-27 16:48:51,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:48:51,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:51,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:48:51,331 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:48:51,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 16:48:51,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:48:51,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:48:51,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:48:51,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:48:51,779 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:51,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-06-27 16:48:51,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:48:51,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:48:51,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:51,893 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 20 treesize of output 17 [2024-06-27 16:48:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:48:51,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131690538] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:48:51,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:48:51,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 25 [2024-06-27 16:48:51,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086475934] [2024-06-27 16:48:51,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:48:51,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:48:51,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:48:51,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:48:51,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:48:51,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:48:51,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 118 transitions, 1121 flow. Second operand has 26 states, 26 states have (on average 6.615384615384615) internal successors, (172), 26 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:48:51,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:48:51,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:48:51,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:48:52,728 INFO L124 PetriNetUnfolderBase]: 1093/1586 cut-off events. [2024-06-27 16:48:52,728 INFO L125 PetriNetUnfolderBase]: For 6803/6803 co-relation queries the response was YES. [2024-06-27 16:48:52,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7696 conditions, 1586 events. 1093/1586 cut-off events. For 6803/6803 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6055 event pairs, 83 based on Foata normal form. 1/1587 useless extension candidates. Maximal degree in co-relation 7623. Up to 1166 conditions per place. [2024-06-27 16:48:52,743 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 91 selfloop transitions, 78 changer transitions 1/171 dead transitions. [2024-06-27 16:48:52,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 171 transitions, 1732 flow [2024-06-27 16:48:52,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:48:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:48:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 152 transitions. [2024-06-27 16:48:52,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3771712158808933 [2024-06-27 16:48:52,744 INFO L175 Difference]: Start difference. First operand has 93 places, 118 transitions, 1121 flow. Second operand 13 states and 152 transitions. [2024-06-27 16:48:52,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 171 transitions, 1732 flow [2024-06-27 16:48:52,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 171 transitions, 1648 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 16:48:52,765 INFO L231 Difference]: Finished difference. Result has 103 places, 128 transitions, 1357 flow [2024-06-27 16:48:52,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1357, PETRI_PLACES=103, PETRI_TRANSITIONS=128} [2024-06-27 16:48:52,766 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 72 predicate places. [2024-06-27 16:48:52,767 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 128 transitions, 1357 flow [2024-06-27 16:48:52,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.615384615384615) internal successors, (172), 26 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:48:52,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:48:52,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:48:52,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 16:48:52,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-06-27 16:48:52,998 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:48:52,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:48:52,999 INFO L85 PathProgramCache]: Analyzing trace with hash -933814652, now seen corresponding path program 6 times [2024-06-27 16:48:52,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:48:52,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063012063] [2024-06-27 16:48:52,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:48:52,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:48:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:48:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:48:53,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:48:53,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063012063] [2024-06-27 16:48:53,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063012063] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:48:53,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566841299] [2024-06-27 16:48:53,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:48:53,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:53,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:48:53,465 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:48:53,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 16:48:53,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:48:53,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:48:53,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:48:53,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:48:53,967 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:53,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-06-27 16:48:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:48:53,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:48:54,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:54,087 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 20 treesize of output 17 [2024-06-27 16:48:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:48:54,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566841299] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:48:54,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:48:54,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 23 [2024-06-27 16:48:54,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105468329] [2024-06-27 16:48:54,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:48:54,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:48:54,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:48:54,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:48:54,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:48:54,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:48:54,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 128 transitions, 1357 flow. Second operand has 24 states, 24 states have (on average 6.833333333333333) internal successors, (164), 24 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:48:54,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:48:54,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:48:54,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:48:54,783 INFO L124 PetriNetUnfolderBase]: 1168/1695 cut-off events. [2024-06-27 16:48:54,783 INFO L125 PetriNetUnfolderBase]: For 8439/8439 co-relation queries the response was YES. [2024-06-27 16:48:54,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8721 conditions, 1695 events. 1168/1695 cut-off events. For 8439/8439 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6500 event pairs, 133 based on Foata normal form. 1/1696 useless extension candidates. Maximal degree in co-relation 8644. Up to 1390 conditions per place. [2024-06-27 16:48:54,799 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 107 selfloop transitions, 67 changer transitions 1/176 dead transitions. [2024-06-27 16:48:54,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 176 transitions, 1989 flow [2024-06-27 16:48:54,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:48:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:48:54,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-27 16:48:54,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 16:48:54,801 INFO L175 Difference]: Start difference. First operand has 103 places, 128 transitions, 1357 flow. Second operand 10 states and 130 transitions. [2024-06-27 16:48:54,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 176 transitions, 1989 flow [2024-06-27 16:48:54,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 176 transitions, 1793 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-27 16:48:54,821 INFO L231 Difference]: Finished difference. Result has 108 places, 140 transitions, 1533 flow [2024-06-27 16:48:54,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1533, PETRI_PLACES=108, PETRI_TRANSITIONS=140} [2024-06-27 16:48:54,822 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2024-06-27 16:48:54,823 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 140 transitions, 1533 flow [2024-06-27 16:48:54,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.833333333333333) internal successors, (164), 24 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:48:54,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:48:54,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:48:54,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-06-27 16:48:55,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-06-27 16:48:55,035 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:48:55,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:48:55,035 INFO L85 PathProgramCache]: Analyzing trace with hash 753019742, now seen corresponding path program 7 times [2024-06-27 16:48:55,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:48:55,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522886297] [2024-06-27 16:48:55,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:48:55,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:48:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:48:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:48:55,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:48:55,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522886297] [2024-06-27 16:48:55,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522886297] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:48:55,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392398077] [2024-06-27 16:48:55,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:48:55,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:55,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:48:55,631 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:48:55,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 16:48:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:48:55,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:48:55,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:48:55,948 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:55,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2024-06-27 16:48:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:48:55,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:08,261 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:50:08,261 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 20 treesize of output 17 [2024-06-27 16:50:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:50:08,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392398077] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:08,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:08,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2024-06-27 16:50:08,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403153311] [2024-06-27 16:50:08,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:08,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:50:08,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:08,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:50:08,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=456, Unknown=16, NotChecked=0, Total=552 [2024-06-27 16:50:08,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:50:08,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 140 transitions, 1533 flow. Second operand has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:08,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:08,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:50:08,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:13,143 INFO L124 PetriNetUnfolderBase]: 1218/1768 cut-off events. [2024-06-27 16:50:13,143 INFO L125 PetriNetUnfolderBase]: For 9193/9193 co-relation queries the response was YES. [2024-06-27 16:50:13,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9247 conditions, 1768 events. 1218/1768 cut-off events. For 9193/9193 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6880 event pairs, 147 based on Foata normal form. 1/1769 useless extension candidates. Maximal degree in co-relation 9170. Up to 1463 conditions per place. [2024-06-27 16:50:13,158 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 107 selfloop transitions, 74 changer transitions 1/183 dead transitions. [2024-06-27 16:50:13,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 183 transitions, 2090 flow [2024-06-27 16:50:13,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:50:13,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:50:13,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 147 transitions. [2024-06-27 16:50:13,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36476426799007444 [2024-06-27 16:50:13,160 INFO L175 Difference]: Start difference. First operand has 108 places, 140 transitions, 1533 flow. Second operand 13 states and 147 transitions. [2024-06-27 16:50:13,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 183 transitions, 2090 flow [2024-06-27 16:50:13,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 183 transitions, 1922 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 16:50:13,185 INFO L231 Difference]: Finished difference. Result has 118 places, 145 transitions, 1613 flow [2024-06-27 16:50:13,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1613, PETRI_PLACES=118, PETRI_TRANSITIONS=145} [2024-06-27 16:50:13,185 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 87 predicate places. [2024-06-27 16:50:13,185 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 145 transitions, 1613 flow [2024-06-27 16:50:13,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:13,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:13,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:13,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:13,397 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,SelfDestructingSolverStorable13 [2024-06-27 16:50:13,397 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:50:13,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:13,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1915957158, now seen corresponding path program 8 times [2024-06-27 16:50:13,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:13,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47764336] [2024-06-27 16:50:13,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:13,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:50:14,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:14,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47764336] [2024-06-27 16:50:14,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47764336] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:14,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997766149] [2024-06-27 16:50:14,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:50:14,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:14,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:14,020 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:14,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 16:50:14,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:50:14,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:14,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 48 conjunts are in the unsatisfiable core [2024-06-27 16:50:14,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:14,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:50:14,228 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:50:14,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 16:50:14,511 INFO L349 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2024-06-27 16:50:14,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-06-27 16:50:14,733 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:50:14,733 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 76 treesize of output 96 [2024-06-27 16:50:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:50:14,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:20,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:50:20,988 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 52 treesize of output 40 [2024-06-27 16:50:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:50:21,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997766149] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:21,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:21,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2024-06-27 16:50:21,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426876065] [2024-06-27 16:50:21,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:21,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:50:21,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:21,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:50:21,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=751, Unknown=2, NotChecked=0, Total=870 [2024-06-27 16:50:21,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:50:21,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 145 transitions, 1613 flow. Second operand has 30 states, 30 states have (on average 6.266666666666667) internal successors, (188), 30 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:21,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:21,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:50:21,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:22,296 INFO L124 PetriNetUnfolderBase]: 1340/1943 cut-off events. [2024-06-27 16:50:22,297 INFO L125 PetriNetUnfolderBase]: For 11562/11562 co-relation queries the response was YES. [2024-06-27 16:50:22,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10165 conditions, 1943 events. 1340/1943 cut-off events. For 11562/11562 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7749 event pairs, 145 based on Foata normal form. 1/1944 useless extension candidates. Maximal degree in co-relation 10081. Up to 1570 conditions per place. [2024-06-27 16:50:22,313 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 111 selfloop transitions, 78 changer transitions 1/191 dead transitions. [2024-06-27 16:50:22,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 191 transitions, 2262 flow [2024-06-27 16:50:22,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:50:22,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:50:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 146 transitions. [2024-06-27 16:50:22,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36228287841191065 [2024-06-27 16:50:22,320 INFO L175 Difference]: Start difference. First operand has 118 places, 145 transitions, 1613 flow. Second operand 13 states and 146 transitions. [2024-06-27 16:50:22,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 191 transitions, 2262 flow [2024-06-27 16:50:22,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 191 transitions, 2054 flow, removed 30 selfloop flow, removed 12 redundant places. [2024-06-27 16:50:22,352 INFO L231 Difference]: Finished difference. Result has 120 places, 155 transitions, 1747 flow [2024-06-27 16:50:22,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1747, PETRI_PLACES=120, PETRI_TRANSITIONS=155} [2024-06-27 16:50:22,354 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 89 predicate places. [2024-06-27 16:50:22,354 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 155 transitions, 1747 flow [2024-06-27 16:50:22,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.266666666666667) internal successors, (188), 30 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:22,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:22,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:22,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:22,568 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,SelfDestructingSolverStorable14 [2024-06-27 16:50:22,568 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:50:22,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:22,569 INFO L85 PathProgramCache]: Analyzing trace with hash 968373166, now seen corresponding path program 9 times [2024-06-27 16:50:22,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:22,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306145983] [2024-06-27 16:50:22,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:22,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:50:23,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:23,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306145983] [2024-06-27 16:50:23,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306145983] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:23,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290863934] [2024-06-27 16:50:23,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:50:23,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:23,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:23,240 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:23,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 16:50:23,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:50:23,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:23,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 48 conjunts are in the unsatisfiable core [2024-06-27 16:50:23,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:23,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:50:23,465 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:50:23,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 16:50:23,864 INFO L349 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2024-06-27 16:50:23,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-06-27 16:50:23,993 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:50:23,993 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 66 treesize of output 94 [2024-06-27 16:50:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:50:24,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:34,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:50:34,951 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 52 treesize of output 40 [2024-06-27 16:50:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:50:35,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290863934] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:35,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:35,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2024-06-27 16:50:35,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385372628] [2024-06-27 16:50:35,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:35,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:50:35,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:35,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:50:35,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=748, Unknown=1, NotChecked=0, Total=870 [2024-06-27 16:50:35,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:50:35,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 155 transitions, 1747 flow. Second operand has 30 states, 30 states have (on average 6.266666666666667) internal successors, (188), 30 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:35,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:35,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:50:35,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:36,224 INFO L124 PetriNetUnfolderBase]: 1414/2050 cut-off events. [2024-06-27 16:50:36,225 INFO L125 PetriNetUnfolderBase]: For 12965/12965 co-relation queries the response was YES. [2024-06-27 16:50:36,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10875 conditions, 2050 events. 1414/2050 cut-off events. For 12965/12965 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8286 event pairs, 188 based on Foata normal form. 1/2051 useless extension candidates. Maximal degree in co-relation 10791. Up to 1747 conditions per place. [2024-06-27 16:50:36,246 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 122 selfloop transitions, 72 changer transitions 1/196 dead transitions. [2024-06-27 16:50:36,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 196 transitions, 2363 flow [2024-06-27 16:50:36,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:50:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:50:36,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 144 transitions. [2024-06-27 16:50:36,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573200992555831 [2024-06-27 16:50:36,248 INFO L175 Difference]: Start difference. First operand has 120 places, 155 transitions, 1747 flow. Second operand 13 states and 144 transitions. [2024-06-27 16:50:36,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 196 transitions, 2363 flow [2024-06-27 16:50:36,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 196 transitions, 2131 flow, removed 74 selfloop flow, removed 8 redundant places. [2024-06-27 16:50:36,280 INFO L231 Difference]: Finished difference. Result has 126 places, 161 transitions, 1802 flow [2024-06-27 16:50:36,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1802, PETRI_PLACES=126, PETRI_TRANSITIONS=161} [2024-06-27 16:50:36,281 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 95 predicate places. [2024-06-27 16:50:36,281 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 161 transitions, 1802 flow [2024-06-27 16:50:36,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.266666666666667) internal successors, (188), 30 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:36,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:36,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:36,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:36,493 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,SelfDestructingSolverStorable15 [2024-06-27 16:50:36,493 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:50:36,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:36,494 INFO L85 PathProgramCache]: Analyzing trace with hash 652598522, now seen corresponding path program 10 times [2024-06-27 16:50:36,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:36,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776290770] [2024-06-27 16:50:36,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:36,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:50:37,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:37,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776290770] [2024-06-27 16:50:37,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776290770] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:37,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884196402] [2024-06-27 16:50:37,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:50:37,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:37,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:37,146 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:37,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-27 16:50:37,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:50:37,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:37,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:50:37,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:37,565 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:50:37,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2024-06-27 16:50:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:50:37,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:45,817 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:50:45,817 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 34 treesize of output 87 [2024-06-27 16:50:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:50:46,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884196402] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:46,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:46,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2024-06-27 16:50:46,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687778066] [2024-06-27 16:50:46,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:46,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:50:46,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:46,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:50:46,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=467, Unknown=2, NotChecked=0, Total=552 [2024-06-27 16:50:46,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:50:46,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 161 transitions, 1802 flow. Second operand has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:46,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:46,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:50:46,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:47,324 INFO L124 PetriNetUnfolderBase]: 1630/2362 cut-off events. [2024-06-27 16:50:47,324 INFO L125 PetriNetUnfolderBase]: For 16721/16721 co-relation queries the response was YES. [2024-06-27 16:50:47,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12968 conditions, 2362 events. 1630/2362 cut-off events. For 16721/16721 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9844 event pairs, 403 based on Foata normal form. 1/2363 useless extension candidates. Maximal degree in co-relation 12881. Up to 2060 conditions per place. [2024-06-27 16:50:47,338 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 156 selfloop transitions, 71 changer transitions 1/229 dead transitions. [2024-06-27 16:50:47,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 229 transitions, 2913 flow [2024-06-27 16:50:47,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:50:47,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:50:47,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 145 transitions. [2024-06-27 16:50:47,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3598014888337469 [2024-06-27 16:50:47,353 INFO L175 Difference]: Start difference. First operand has 126 places, 161 transitions, 1802 flow. Second operand 13 states and 145 transitions. [2024-06-27 16:50:47,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 229 transitions, 2913 flow [2024-06-27 16:50:47,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 229 transitions, 2673 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-06-27 16:50:47,381 INFO L231 Difference]: Finished difference. Result has 132 places, 192 transitions, 2326 flow [2024-06-27 16:50:47,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2326, PETRI_PLACES=132, PETRI_TRANSITIONS=192} [2024-06-27 16:50:47,382 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 101 predicate places. [2024-06-27 16:50:47,382 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 192 transitions, 2326 flow [2024-06-27 16:50:47,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:47,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:47,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:47,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:47,594 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,SelfDestructingSolverStorable16 [2024-06-27 16:50:47,594 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:50:47,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:47,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1891158452, now seen corresponding path program 11 times [2024-06-27 16:50:47,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:47,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336570272] [2024-06-27 16:50:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:47,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:50:48,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:48,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336570272] [2024-06-27 16:50:48,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336570272] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:48,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59153666] [2024-06-27 16:50:48,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:50:48,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:48,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:48,201 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:48,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-27 16:50:48,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:50:48,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:48,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:50:48,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:48,769 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:50:48,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-06-27 16:50:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:50:48,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:48,968 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:50:48,969 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 34 treesize of output 87 [2024-06-27 16:50:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:50:49,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59153666] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:49,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:49,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 25 [2024-06-27 16:50:49,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466562130] [2024-06-27 16:50:49,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:49,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:50:49,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:49,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:50:49,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:50:49,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:50:49,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 192 transitions, 2326 flow. Second operand has 26 states, 26 states have (on average 6.615384615384615) internal successors, (172), 26 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:49,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:49,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:50:49,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:50,486 INFO L124 PetriNetUnfolderBase]: 1771/2567 cut-off events. [2024-06-27 16:50:50,486 INFO L125 PetriNetUnfolderBase]: For 22011/22011 co-relation queries the response was YES. [2024-06-27 16:50:50,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14534 conditions, 2567 events. 1771/2567 cut-off events. For 22011/22011 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10957 event pairs, 467 based on Foata normal form. 1/2568 useless extension candidates. Maximal degree in co-relation 14443. Up to 2291 conditions per place. [2024-06-27 16:50:50,503 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 180 selfloop transitions, 67 changer transitions 1/249 dead transitions. [2024-06-27 16:50:50,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 249 transitions, 3293 flow [2024-06-27 16:50:50,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:50:50,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:50:50,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 147 transitions. [2024-06-27 16:50:50,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36476426799007444 [2024-06-27 16:50:50,515 INFO L175 Difference]: Start difference. First operand has 132 places, 192 transitions, 2326 flow. Second operand 13 states and 147 transitions. [2024-06-27 16:50:50,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 249 transitions, 3293 flow [2024-06-27 16:50:50,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 249 transitions, 3094 flow, removed 89 selfloop flow, removed 5 redundant places. [2024-06-27 16:50:50,596 INFO L231 Difference]: Finished difference. Result has 143 places, 210 transitions, 2679 flow [2024-06-27 16:50:50,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2679, PETRI_PLACES=143, PETRI_TRANSITIONS=210} [2024-06-27 16:50:50,597 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 112 predicate places. [2024-06-27 16:50:50,597 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 210 transitions, 2679 flow [2024-06-27 16:50:50,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.615384615384615) internal successors, (172), 26 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:50,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:50,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:50,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-06-27 16:50:50,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:50,804 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:50:50,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:50,805 INFO L85 PathProgramCache]: Analyzing trace with hash 58924304, now seen corresponding path program 12 times [2024-06-27 16:50:50,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:50,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771760922] [2024-06-27 16:50:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:50,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:50:51,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:51,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771760922] [2024-06-27 16:50:51,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771760922] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:51,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464762602] [2024-06-27 16:50:51,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:50:51,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:51,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:51,580 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:51,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-27 16:50:51,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:50:51,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:50:51,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 48 conjunts are in the unsatisfiable core [2024-06-27 16:50:51,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:51,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:50:51,823 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:50:51,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 16:50:52,268 INFO L349 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2024-06-27 16:50:52,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-06-27 16:50:52,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:50:52,552 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 66 treesize of output 94 [2024-06-27 16:50:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:50:52,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:50:54,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:50:54,519 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 74 treesize of output 118 [2024-06-27 16:50:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:50:54,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464762602] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:50:54,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:50:54,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2024-06-27 16:50:54,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905047002] [2024-06-27 16:50:54,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:50:54,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:50:54,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:50:54,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:50:54,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:50:54,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:50:54,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 210 transitions, 2679 flow. Second operand has 30 states, 30 states have (on average 6.333333333333333) internal successors, (190), 30 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:54,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:50:54,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:50:54,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:50:56,316 INFO L124 PetriNetUnfolderBase]: 1845/2674 cut-off events. [2024-06-27 16:50:56,316 INFO L125 PetriNetUnfolderBase]: For 22930/22930 co-relation queries the response was YES. [2024-06-27 16:50:56,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15065 conditions, 2674 events. 1845/2674 cut-off events. For 22930/22930 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11480 event pairs, 520 based on Foata normal form. 1/2675 useless extension candidates. Maximal degree in co-relation 14969. Up to 2478 conditions per place. [2024-06-27 16:50:56,333 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 184 selfloop transitions, 64 changer transitions 1/250 dead transitions. [2024-06-27 16:50:56,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 250 transitions, 3407 flow [2024-06-27 16:50:56,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:50:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:50:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 141 transitions. [2024-06-27 16:50:56,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34987593052109184 [2024-06-27 16:50:56,336 INFO L175 Difference]: Start difference. First operand has 143 places, 210 transitions, 2679 flow. Second operand 13 states and 141 transitions. [2024-06-27 16:50:56,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 250 transitions, 3407 flow [2024-06-27 16:50:56,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 250 transitions, 3177 flow, removed 103 selfloop flow, removed 5 redundant places. [2024-06-27 16:50:56,400 INFO L231 Difference]: Finished difference. Result has 153 places, 217 transitions, 2739 flow [2024-06-27 16:50:56,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2449, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2739, PETRI_PLACES=153, PETRI_TRANSITIONS=217} [2024-06-27 16:50:56,402 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 122 predicate places. [2024-06-27 16:50:56,402 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 217 transitions, 2739 flow [2024-06-27 16:50:56,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.333333333333333) internal successors, (190), 30 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:50:56,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:50:56,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:50:56,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-27 16:50:56,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:56,614 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:50:56,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:50:56,615 INFO L85 PathProgramCache]: Analyzing trace with hash 53472212, now seen corresponding path program 13 times [2024-06-27 16:50:56,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:50:56,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413476917] [2024-06-27 16:50:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:50:56,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:50:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:50:57,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:50:57,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413476917] [2024-06-27 16:50:57,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413476917] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:50:57,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087898482] [2024-06-27 16:50:57,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:50:57,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:50:57,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:50:57,351 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:50:57,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-27 16:50:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:50:57,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:50:57,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:50:57,771 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:50:57,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2024-06-27 16:50:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:50:57,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:51:14,074 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:51:14,075 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 34 treesize of output 87 [2024-06-27 16:51:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:51:14,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087898482] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:51:14,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:51:14,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2024-06-27 16:51:14,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725421621] [2024-06-27 16:51:14,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:51:14,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:51:14,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:51:14,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:51:14,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=465, Unknown=4, NotChecked=0, Total=552 [2024-06-27 16:51:14,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:51:14,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 217 transitions, 2739 flow. Second operand has 24 states, 24 states have (on average 6.833333333333333) internal successors, (164), 24 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:51:14,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:51:14,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:51:14,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:51:15,955 INFO L124 PetriNetUnfolderBase]: 2014/2919 cut-off events. [2024-06-27 16:51:15,955 INFO L125 PetriNetUnfolderBase]: For 27174/27174 co-relation queries the response was YES. [2024-06-27 16:51:15,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16432 conditions, 2919 events. 2014/2919 cut-off events. For 27174/27174 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12797 event pairs, 552 based on Foata normal form. 1/2920 useless extension candidates. Maximal degree in co-relation 16332. Up to 2668 conditions per place. [2024-06-27 16:51:15,973 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 207 selfloop transitions, 59 changer transitions 1/268 dead transitions. [2024-06-27 16:51:15,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 268 transitions, 3710 flow [2024-06-27 16:51:15,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:51:15,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:51:15,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 146 transitions. [2024-06-27 16:51:15,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36228287841191065 [2024-06-27 16:51:15,974 INFO L175 Difference]: Start difference. First operand has 153 places, 217 transitions, 2739 flow. Second operand 13 states and 146 transitions. [2024-06-27 16:51:15,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 268 transitions, 3710 flow [2024-06-27 16:51:16,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 268 transitions, 3506 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-06-27 16:51:16,020 INFO L231 Difference]: Finished difference. Result has 159 places, 230 transitions, 2983 flow [2024-06-27 16:51:16,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2535, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2983, PETRI_PLACES=159, PETRI_TRANSITIONS=230} [2024-06-27 16:51:16,021 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 128 predicate places. [2024-06-27 16:51:16,021 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 230 transitions, 2983 flow [2024-06-27 16:51:16,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.833333333333333) internal successors, (164), 24 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:51:16,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:51:16,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:51:16,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-06-27 16:51:16,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:16,233 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:51:16,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:51:16,233 INFO L85 PathProgramCache]: Analyzing trace with hash 220515634, now seen corresponding path program 14 times [2024-06-27 16:51:16,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:51:16,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165194496] [2024-06-27 16:51:16,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:51:16,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:51:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:51:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:51:16,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:51:16,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165194496] [2024-06-27 16:51:16,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165194496] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:51:16,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77821445] [2024-06-27 16:51:16,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:51:16,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:16,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:51:16,910 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:51:16,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-27 16:51:17,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:51:17,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:51:17,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:51:17,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:51:17,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:51:17,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-06-27 16:51:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:51:17,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:51:17,929 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:51:17,930 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 34 treesize of output 87 [2024-06-27 16:51:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:51:18,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77821445] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:51:18,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:51:18,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 25 [2024-06-27 16:51:18,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445396625] [2024-06-27 16:51:18,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:51:18,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:51:18,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:51:18,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:51:18,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:51:18,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:51:18,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 230 transitions, 2983 flow. Second operand has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:51:18,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:51:18,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:51:18,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:51:19,394 INFO L124 PetriNetUnfolderBase]: 2089/3028 cut-off events. [2024-06-27 16:51:19,394 INFO L125 PetriNetUnfolderBase]: For 29625/29625 co-relation queries the response was YES. [2024-06-27 16:51:19,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17134 conditions, 3028 events. 2089/3028 cut-off events. For 29625/29625 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13376 event pairs, 590 based on Foata normal form. 1/3029 useless extension candidates. Maximal degree in co-relation 17031. Up to 2830 conditions per place. [2024-06-27 16:51:19,418 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 204 selfloop transitions, 64 changer transitions 1/270 dead transitions. [2024-06-27 16:51:19,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 270 transitions, 3744 flow [2024-06-27 16:51:19,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:51:19,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:51:19,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 142 transitions. [2024-06-27 16:51:19,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523573200992556 [2024-06-27 16:51:19,419 INFO L175 Difference]: Start difference. First operand has 159 places, 230 transitions, 2983 flow. Second operand 13 states and 142 transitions. [2024-06-27 16:51:19,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 270 transitions, 3744 flow [2024-06-27 16:51:19,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 270 transitions, 3430 flow, removed 128 selfloop flow, removed 7 redundant places. [2024-06-27 16:51:19,479 INFO L231 Difference]: Finished difference. Result has 166 places, 236 transitions, 2934 flow [2024-06-27 16:51:19,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2934, PETRI_PLACES=166, PETRI_TRANSITIONS=236} [2024-06-27 16:51:19,480 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 135 predicate places. [2024-06-27 16:51:19,480 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 236 transitions, 2934 flow [2024-06-27 16:51:19,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:51:19,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:51:19,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:51:19,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-06-27 16:51:19,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:19,692 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:51:19,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:51:19,693 INFO L85 PathProgramCache]: Analyzing trace with hash 140884560, now seen corresponding path program 15 times [2024-06-27 16:51:19,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:51:19,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807405220] [2024-06-27 16:51:19,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:51:19,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:51:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:51:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:51:20,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:51:20,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807405220] [2024-06-27 16:51:20,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807405220] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:51:20,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708160695] [2024-06-27 16:51:20,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:51:20,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:20,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:51:20,312 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:51:20,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-27 16:51:20,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:51:20,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:51:20,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:51:20,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:51:20,863 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:51:20,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-06-27 16:51:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:51:20,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:51:21,035 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:51:21,035 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 34 treesize of output 87 [2024-06-27 16:51:21,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:51:21,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708160695] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:51:21,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:51:21,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 25 [2024-06-27 16:51:21,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446519127] [2024-06-27 16:51:21,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:51:21,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:51:21,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:51:21,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:51:21,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:51:21,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:51:21,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 236 transitions, 2934 flow. Second operand has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:51:21,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:51:21,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:51:21,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:51:22,403 INFO L124 PetriNetUnfolderBase]: 2174/3151 cut-off events. [2024-06-27 16:51:22,403 INFO L125 PetriNetUnfolderBase]: For 30164/30164 co-relation queries the response was YES. [2024-06-27 16:51:22,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17211 conditions, 3151 events. 2174/3151 cut-off events. For 30164/30164 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 14087 event pairs, 629 based on Foata normal form. 1/3152 useless extension candidates. Maximal degree in co-relation 17105. Up to 2963 conditions per place. [2024-06-27 16:51:22,423 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 217 selfloop transitions, 59 changer transitions 1/278 dead transitions. [2024-06-27 16:51:22,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 278 transitions, 3751 flow [2024-06-27 16:51:22,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:51:22,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:51:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 140 transitions. [2024-06-27 16:51:22,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34739454094292804 [2024-06-27 16:51:22,424 INFO L175 Difference]: Start difference. First operand has 166 places, 236 transitions, 2934 flow. Second operand 13 states and 140 transitions. [2024-06-27 16:51:22,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 278 transitions, 3751 flow [2024-06-27 16:51:22,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 278 transitions, 3547 flow, removed 42 selfloop flow, removed 10 redundant places. [2024-06-27 16:51:22,478 INFO L231 Difference]: Finished difference. Result has 171 places, 246 transitions, 3041 flow [2024-06-27 16:51:22,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2730, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3041, PETRI_PLACES=171, PETRI_TRANSITIONS=246} [2024-06-27 16:51:22,478 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 140 predicate places. [2024-06-27 16:51:22,479 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 246 transitions, 3041 flow [2024-06-27 16:51:22,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:51:22,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:51:22,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:51:22,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-06-27 16:51:22,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:22,688 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:51:22,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:51:22,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1105674352, now seen corresponding path program 16 times [2024-06-27 16:51:22,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:51:22,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093280934] [2024-06-27 16:51:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:51:22,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:51:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:51:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:51:23,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:51:23,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093280934] [2024-06-27 16:51:23,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093280934] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:51:23,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219315004] [2024-06-27 16:51:23,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:51:23,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:23,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:51:23,467 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:51:23,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-06-27 16:51:23,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:51:23,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:51:23,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 43 conjunts are in the unsatisfiable core [2024-06-27 16:51:23,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:51:23,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:51:23,664 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-06-27 16:51:23,665 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-06-27 16:51:23,706 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:51:23,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 16:51:24,008 INFO L349 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2024-06-27 16:51:24,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-06-27 16:51:24,092 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 28 treesize of output 12 [2024-06-27 16:51:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:51:24,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:51:28,163 WARN L854 $PredicateComparison]: unable to prove that (forall ((~A~0.offset Int) (~C~0.offset Int)) (let ((.cse2 (* 4 |c_thread3Thread1of1ForFork0_~i~2#1|))) (let ((.cse0 (select (select |c_#memory_int#1| c_~B~0.base) (+ .cse2 c_~B~0.offset))) (.cse1 (select (select |c_#memory_int#1| c_~A~0.base) (+ .cse2 ~A~0.offset)))) (= (+ .cse0 .cse1 c_~csum~0) (+ c_~asum~0 (select (select (store |c_#memory_int#1| c_~C~0.base (store (select |c_#memory_int#1| c_~C~0.base) (+ .cse2 ~C~0.offset) (+ .cse0 .cse1))) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) ~A~0.offset)) c_~bsum~0))))) is different from false [2024-06-27 16:51:32,191 WARN L854 $PredicateComparison]: unable to prove that (forall ((~A~0.offset Int) (~C~0.offset Int)) (let ((.cse0 (select (select |c_#memory_int#1| c_~A~0.base) ~A~0.offset)) (.cse1 (select (select |c_#memory_int#1| c_~B~0.base) c_~B~0.offset))) (= (+ c_~asum~0 c_~bsum~0 (select (select (store |c_#memory_int#1| c_~C~0.base (store (select |c_#memory_int#1| c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) ~A~0.offset))) (+ .cse0 .cse1 c_~csum~0)))) is different from false [2024-06-27 16:51:32,280 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:51:32,280 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 74 treesize of output 118 [2024-06-27 16:51:32,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2024-06-27 16:51:32,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219315004] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:51:32,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:51:32,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 31 [2024-06-27 16:51:32,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930529681] [2024-06-27 16:51:32,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:51:32,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:51:32,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:51:32,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:51:32,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=757, Unknown=2, NotChecked=114, Total=992 [2024-06-27 16:51:32,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:51:32,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 246 transitions, 3041 flow. Second operand has 32 states, 32 states have (on average 6.0625) internal successors, (194), 32 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) [2024-06-27 16:51:32,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:51:32,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:51:32,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:51:34,917 INFO L124 PetriNetUnfolderBase]: 2244/3252 cut-off events. [2024-06-27 16:51:34,925 INFO L125 PetriNetUnfolderBase]: For 33891/33891 co-relation queries the response was YES. [2024-06-27 16:51:34,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17955 conditions, 3252 events. 2244/3252 cut-off events. For 33891/33891 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 14649 event pairs, 653 based on Foata normal form. 1/3253 useless extension candidates. Maximal degree in co-relation 17846. Up to 3071 conditions per place. [2024-06-27 16:51:34,949 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 222 selfloop transitions, 58 changer transitions 1/282 dead transitions. [2024-06-27 16:51:34,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 282 transitions, 3885 flow [2024-06-27 16:51:34,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:51:34,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:51:34,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 141 transitions. [2024-06-27 16:51:34,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3248847926267281 [2024-06-27 16:51:34,951 INFO L175 Difference]: Start difference. First operand has 171 places, 246 transitions, 3041 flow. Second operand 14 states and 141 transitions. [2024-06-27 16:51:34,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 282 transitions, 3885 flow [2024-06-27 16:51:35,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 282 transitions, 3669 flow, removed 54 selfloop flow, removed 9 redundant places. [2024-06-27 16:51:35,028 INFO L231 Difference]: Finished difference. Result has 177 places, 252 transitions, 3145 flow [2024-06-27 16:51:35,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2825, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3145, PETRI_PLACES=177, PETRI_TRANSITIONS=252} [2024-06-27 16:51:35,029 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 146 predicate places. [2024-06-27 16:51:35,029 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 252 transitions, 3145 flow [2024-06-27 16:51:35,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.0625) internal successors, (194), 32 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) [2024-06-27 16:51:35,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:51:35,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:51:35,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-06-27 16:51:35,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:35,242 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:51:35,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:51:35,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1037120950, now seen corresponding path program 17 times [2024-06-27 16:51:35,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:51:35,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542859634] [2024-06-27 16:51:35,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:51:35,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:51:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:51:35,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:51:35,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:51:35,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542859634] [2024-06-27 16:51:35,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542859634] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:51:35,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760309902] [2024-06-27 16:51:35,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:51:35,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:35,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:51:35,947 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:51:35,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-06-27 16:51:36,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:51:36,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:51:36,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:51:36,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:51:36,635 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:51:36,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-06-27 16:51:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:51:36,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:51:36,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:51:36,853 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 95 [2024-06-27 16:51:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:51:37,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760309902] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:51:37,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:51:37,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 25 [2024-06-27 16:51:37,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738866808] [2024-06-27 16:51:37,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:51:37,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:51:37,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:51:37,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:51:37,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:51:37,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:51:37,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 252 transitions, 3145 flow. Second operand has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:51:37,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:51:37,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:51:37,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:51:38,749 INFO L124 PetriNetUnfolderBase]: 2329/3375 cut-off events. [2024-06-27 16:51:38,750 INFO L125 PetriNetUnfolderBase]: For 36796/36796 co-relation queries the response was YES. [2024-06-27 16:51:38,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18616 conditions, 3375 events. 2329/3375 cut-off events. For 36796/36796 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 15351 event pairs, 688 based on Foata normal form. 1/3376 useless extension candidates. Maximal degree in co-relation 18506. Up to 3213 conditions per place. [2024-06-27 16:51:38,770 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 229 selfloop transitions, 57 changer transitions 1/288 dead transitions. [2024-06-27 16:51:38,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 288 transitions, 3973 flow [2024-06-27 16:51:38,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:51:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:51:38,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 134 transitions. [2024-06-27 16:51:38,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3325062034739454 [2024-06-27 16:51:38,772 INFO L175 Difference]: Start difference. First operand has 177 places, 252 transitions, 3145 flow. Second operand 13 states and 134 transitions. [2024-06-27 16:51:38,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 288 transitions, 3973 flow [2024-06-27 16:51:38,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 288 transitions, 3734 flow, removed 83 selfloop flow, removed 9 redundant places. [2024-06-27 16:51:38,845 INFO L231 Difference]: Finished difference. Result has 184 places, 262 transitions, 3246 flow [2024-06-27 16:51:38,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2911, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3246, PETRI_PLACES=184, PETRI_TRANSITIONS=262} [2024-06-27 16:51:38,845 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 153 predicate places. [2024-06-27 16:51:38,846 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 262 transitions, 3246 flow [2024-06-27 16:51:38,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:51:38,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:51:38,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:51:38,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-06-27 16:51:39,050 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,SelfDestructingSolverStorable23 [2024-06-27 16:51:39,050 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:51:39,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:51:39,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1902452434, now seen corresponding path program 18 times [2024-06-27 16:51:39,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:51:39,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092989151] [2024-06-27 16:51:39,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:51:39,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:51:39,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:51:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:51:39,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:51:39,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092989151] [2024-06-27 16:51:39,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092989151] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:51:39,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025262709] [2024-06-27 16:51:39,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:51:39,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:39,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:51:39,856 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:51:39,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-06-27 16:51:39,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:51:39,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:51:39,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:51:39,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:51:40,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:51:40,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-06-27 16:51:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:51:40,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:51:40,798 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:51:40,798 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 95 [2024-06-27 16:51:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:51:41,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025262709] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:51:41,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:51:41,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 26 [2024-06-27 16:51:41,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214747332] [2024-06-27 16:51:41,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:51:41,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 16:51:41,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:51:41,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 16:51:41,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2024-06-27 16:51:41,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:51:41,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 262 transitions, 3246 flow. Second operand has 27 states, 27 states have (on average 6.592592592592593) internal successors, (178), 27 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) [2024-06-27 16:51:41,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:51:41,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:51:41,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:51:42,626 INFO L124 PetriNetUnfolderBase]: 2414/3498 cut-off events. [2024-06-27 16:51:42,626 INFO L125 PetriNetUnfolderBase]: For 39819/39819 co-relation queries the response was YES. [2024-06-27 16:51:42,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19382 conditions, 3498 events. 2414/3498 cut-off events. For 39819/39819 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 16028 event pairs, 732 based on Foata normal form. 1/3499 useless extension candidates. Maximal degree in co-relation 19267. Up to 3336 conditions per place. [2024-06-27 16:51:42,707 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 241 selfloop transitions, 57 changer transitions 1/300 dead transitions. [2024-06-27 16:51:42,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 300 transitions, 4121 flow [2024-06-27 16:51:42,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 16:51:42,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 16:51:42,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 144 transitions. [2024-06-27 16:51:42,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3096774193548387 [2024-06-27 16:51:42,709 INFO L175 Difference]: Start difference. First operand has 184 places, 262 transitions, 3246 flow. Second operand 15 states and 144 transitions. [2024-06-27 16:51:42,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 300 transitions, 4121 flow [2024-06-27 16:51:42,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 300 transitions, 3911 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-27 16:51:42,781 INFO L231 Difference]: Finished difference. Result has 194 places, 272 transitions, 3394 flow [2024-06-27 16:51:42,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3038, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3394, PETRI_PLACES=194, PETRI_TRANSITIONS=272} [2024-06-27 16:51:42,782 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 163 predicate places. [2024-06-27 16:51:42,782 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 272 transitions, 3394 flow [2024-06-27 16:51:42,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.592592592592593) internal successors, (178), 27 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) [2024-06-27 16:51:42,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:51:42,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:51:42,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-06-27 16:51:42,993 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,SelfDestructingSolverStorable24 [2024-06-27 16:51:42,994 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:51:42,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:51:42,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1657553748, now seen corresponding path program 19 times [2024-06-27 16:51:42,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:51:42,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864474292] [2024-06-27 16:51:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:51:42,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:51:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:51:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:51:43,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:51:43,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864474292] [2024-06-27 16:51:43,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864474292] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:51:43,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75703259] [2024-06-27 16:51:43,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:51:43,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:43,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:51:43,816 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:51:43,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-06-27 16:51:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:51:43,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 47 conjunts are in the unsatisfiable core [2024-06-27 16:51:43,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:51:43,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:51:44,006 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-06-27 16:51:44,006 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-06-27 16:51:44,090 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-06-27 16:51:44,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-06-27 16:51:44,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2024-06-27 16:51:44,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2024-06-27 16:51:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:51:44,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:51:44,869 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:51:44,870 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 195 treesize of output 215 [2024-06-27 16:51:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:51:46,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75703259] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:51:46,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:51:46,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2024-06-27 16:51:46,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874876191] [2024-06-27 16:51:46,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:51:46,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:51:46,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:51:46,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:51:46,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:51:46,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:51:46,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 272 transitions, 3394 flow. Second operand has 31 states, 31 states have (on average 6.129032258064516) internal successors, (190), 31 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:51:46,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:51:46,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:51:46,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:51:48,650 INFO L124 PetriNetUnfolderBase]: 2498/3619 cut-off events. [2024-06-27 16:51:48,651 INFO L125 PetriNetUnfolderBase]: For 45108/45108 co-relation queries the response was YES. [2024-06-27 16:51:48,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20296 conditions, 3619 events. 2498/3619 cut-off events. For 45108/45108 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 16723 event pairs, 752 based on Foata normal form. 1/3620 useless extension candidates. Maximal degree in co-relation 20177. Up to 3459 conditions per place. [2024-06-27 16:51:48,674 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 250 selfloop transitions, 56 changer transitions 1/308 dead transitions. [2024-06-27 16:51:48,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 308 transitions, 4359 flow [2024-06-27 16:51:48,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:51:48,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:51:48,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 138 transitions. [2024-06-27 16:51:48,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31797235023041476 [2024-06-27 16:51:48,677 INFO L175 Difference]: Start difference. First operand has 194 places, 272 transitions, 3394 flow. Second operand 14 states and 138 transitions. [2024-06-27 16:51:48,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 308 transitions, 4359 flow [2024-06-27 16:51:48,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 308 transitions, 4131 flow, removed 63 selfloop flow, removed 10 redundant places. [2024-06-27 16:51:48,761 INFO L231 Difference]: Finished difference. Result has 199 places, 281 transitions, 3574 flow [2024-06-27 16:51:48,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3166, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3574, PETRI_PLACES=199, PETRI_TRANSITIONS=281} [2024-06-27 16:51:48,761 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 168 predicate places. [2024-06-27 16:51:48,762 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 281 transitions, 3574 flow [2024-06-27 16:51:48,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.129032258064516) internal successors, (190), 31 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:51:48,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:51:48,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:51:48,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-06-27 16:51:48,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-06-27 16:51:48,973 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:51:48,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:51:48,974 INFO L85 PathProgramCache]: Analyzing trace with hash 639609684, now seen corresponding path program 20 times [2024-06-27 16:51:48,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:51:48,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202283927] [2024-06-27 16:51:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:51:48,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:51:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:51:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:51:49,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:51:49,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202283927] [2024-06-27 16:51:49,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202283927] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:51:49,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290130035] [2024-06-27 16:51:49,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:51:49,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:49,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:51:49,869 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:51:49,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-06-27 16:51:49,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:51:49,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:51:49,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 53 conjunts are in the unsatisfiable core [2024-06-27 16:51:49,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:51:50,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:51:50,076 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-06-27 16:51:50,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-06-27 16:51:50,185 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-06-27 16:51:50,185 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 16 treesize of output 18 [2024-06-27 16:51:50,678 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:51:50,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2024-06-27 16:51:50,919 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:51:50,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2024-06-27 16:51:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:51:50,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:51:51,047 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:51:51,047 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 195 treesize of output 215 [2024-06-27 16:51:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:51:52,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290130035] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:51:52,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:51:52,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2024-06-27 16:51:52,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969790632] [2024-06-27 16:51:52,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:51:52,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:51:52,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:51:52,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:51:52,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:51:52,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:51:52,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 281 transitions, 3574 flow. Second operand has 31 states, 31 states have (on average 6.129032258064516) internal successors, (190), 31 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:51:52,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:51:52,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:51:52,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:51:54,175 INFO L124 PetriNetUnfolderBase]: 2568/3720 cut-off events. [2024-06-27 16:51:54,176 INFO L125 PetriNetUnfolderBase]: For 50397/50397 co-relation queries the response was YES. [2024-06-27 16:51:54,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21013 conditions, 3720 events. 2568/3720 cut-off events. For 50397/50397 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17316 event pairs, 780 based on Foata normal form. 1/3721 useless extension candidates. Maximal degree in co-relation 20894. Up to 3565 conditions per place. [2024-06-27 16:51:54,203 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 255 selfloop transitions, 56 changer transitions 1/313 dead transitions. [2024-06-27 16:51:54,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 313 transitions, 4500 flow [2024-06-27 16:51:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:51:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:51:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 137 transitions. [2024-06-27 16:51:54,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.315668202764977 [2024-06-27 16:51:54,204 INFO L175 Difference]: Start difference. First operand has 199 places, 281 transitions, 3574 flow. Second operand 14 states and 137 transitions. [2024-06-27 16:51:54,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 313 transitions, 4500 flow [2024-06-27 16:51:54,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 313 transitions, 4194 flow, removed 123 selfloop flow, removed 9 redundant places. [2024-06-27 16:51:54,300 INFO L231 Difference]: Finished difference. Result has 205 places, 287 transitions, 3628 flow [2024-06-27 16:51:54,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3268, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3628, PETRI_PLACES=205, PETRI_TRANSITIONS=287} [2024-06-27 16:51:54,300 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 174 predicate places. [2024-06-27 16:51:54,300 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 287 transitions, 3628 flow [2024-06-27 16:51:54,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.129032258064516) internal successors, (190), 31 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:51:54,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:51:54,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:51:54,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-06-27 16:51:54,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:54,508 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:51:54,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:51:54,508 INFO L85 PathProgramCache]: Analyzing trace with hash -2086429070, now seen corresponding path program 21 times [2024-06-27 16:51:54,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:51:54,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377735250] [2024-06-27 16:51:54,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:51:54,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:51:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:51:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:51:55,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:51:55,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377735250] [2024-06-27 16:51:55,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377735250] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:51:55,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477623485] [2024-06-27 16:51:55,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:51:55,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:51:55,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:51:55,470 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:51:55,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-06-27 16:51:55,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:51:55,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:51:55,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 51 conjunts are in the unsatisfiable core [2024-06-27 16:51:55,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:51:55,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:51:55,687 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-06-27 16:51:55,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-06-27 16:51:55,857 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-06-27 16:51:55,858 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 16 treesize of output 18 [2024-06-27 16:51:56,378 INFO L349 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2024-06-27 16:51:56,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-06-27 16:51:56,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:51:56,569 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 66 treesize of output 94 [2024-06-27 16:51:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:51:56,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:52:00,072 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:52:00,072 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 90 treesize of output 134 [2024-06-27 16:52:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:52:00,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477623485] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:52:00,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:52:00,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2024-06-27 16:52:00,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924847326] [2024-06-27 16:52:00,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:52:00,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:52:00,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:52:00,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:52:00,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:52:00,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:52:00,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 287 transitions, 3628 flow. Second operand has 33 states, 33 states have (on average 6.0) internal successors, (198), 33 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:52:00,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:52:00,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:52:00,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:52:02,695 INFO L124 PetriNetUnfolderBase]: 2638/3821 cut-off events. [2024-06-27 16:52:02,695 INFO L125 PetriNetUnfolderBase]: For 54185/54185 co-relation queries the response was YES. [2024-06-27 16:52:02,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21627 conditions, 3821 events. 2638/3821 cut-off events. For 54185/54185 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 17878 event pairs, 807 based on Foata normal form. 1/3822 useless extension candidates. Maximal degree in co-relation 21505. Up to 3666 conditions per place. [2024-06-27 16:52:02,729 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 260 selfloop transitions, 57 changer transitions 1/319 dead transitions. [2024-06-27 16:52:02,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 319 transitions, 4578 flow [2024-06-27 16:52:02,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 16:52:02,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 16:52:02,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 142 transitions. [2024-06-27 16:52:02,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3053763440860215 [2024-06-27 16:52:02,730 INFO L175 Difference]: Start difference. First operand has 205 places, 287 transitions, 3628 flow. Second operand 15 states and 142 transitions. [2024-06-27 16:52:02,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 319 transitions, 4578 flow [2024-06-27 16:52:02,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 319 transitions, 4306 flow, removed 104 selfloop flow, removed 10 redundant places. [2024-06-27 16:52:02,859 INFO L231 Difference]: Finished difference. Result has 211 places, 293 transitions, 3730 flow [2024-06-27 16:52:02,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3356, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3730, PETRI_PLACES=211, PETRI_TRANSITIONS=293} [2024-06-27 16:52:02,859 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 180 predicate places. [2024-06-27 16:52:02,860 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 293 transitions, 3730 flow [2024-06-27 16:52:02,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.0) internal successors, (198), 33 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:52:02,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:52:02,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:52:02,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-06-27 16:52:03,071 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,SelfDestructingSolverStorable27 [2024-06-27 16:52:03,071 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:52:03,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:52:03,072 INFO L85 PathProgramCache]: Analyzing trace with hash 856850222, now seen corresponding path program 22 times [2024-06-27 16:52:03,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:52:03,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169681516] [2024-06-27 16:52:03,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:52:03,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:52:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:52:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:52:03,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:52:03,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169681516] [2024-06-27 16:52:03,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169681516] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:52:03,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071678714] [2024-06-27 16:52:03,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:52:03,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:52:03,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:52:03,958 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:52:03,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-06-27 16:52:04,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:52:04,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:52:04,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2024-06-27 16:52:04,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:52:04,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:52:04,183 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:52:04,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 16:52:04,638 INFO L349 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2024-06-27 16:52:04,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-06-27 16:52:04,716 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 28 treesize of output 12 [2024-06-27 16:52:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:52:04,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:52:09,514 WARN L854 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (~B~0.offset Int)) (let ((.cse2 (* 4 |c_thread3Thread1of1ForFork0_~i~2#1|))) (let ((.cse0 (select (select |c_#memory_int#1| c_~B~0.base) (+ .cse2 ~B~0.offset))) (.cse1 (select (select |c_#memory_int#1| c_~A~0.base) (+ .cse2 c_~A~0.offset)))) (= (+ .cse0 c_~csum~0 .cse1) (+ c_~asum~0 c_~bsum~0 (select (select (store |c_#memory_int#1| c_~C~0.base (store (select |c_#memory_int#1| c_~C~0.base) (+ .cse2 ~C~0.offset) (+ .cse0 .cse1))) c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) ~B~0.offset))))))) is different from false [2024-06-27 16:52:10,021 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:52:10,022 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 90 treesize of output 134 [2024-06-27 16:52:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2024-06-27 16:52:14,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071678714] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:52:14,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:52:14,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 31 [2024-06-27 16:52:14,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022920283] [2024-06-27 16:52:14,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:52:14,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:52:14,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:52:14,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:52:14,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=807, Unknown=1, NotChecked=58, Total=992 [2024-06-27 16:52:14,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:52:14,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 293 transitions, 3730 flow. Second operand has 32 states, 32 states have (on average 6.125) internal successors, (196), 32 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:52:14,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:52:14,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:52:14,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:52:25,068 INFO L124 PetriNetUnfolderBase]: 2724/3945 cut-off events. [2024-06-27 16:52:25,068 INFO L125 PetriNetUnfolderBase]: For 58667/58667 co-relation queries the response was YES. [2024-06-27 16:52:25,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22513 conditions, 3945 events. 2724/3945 cut-off events. For 58667/58667 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 18662 event pairs, 841 based on Foata normal form. 1/3946 useless extension candidates. Maximal degree in co-relation 22387. Up to 3783 conditions per place. [2024-06-27 16:52:25,105 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 271 selfloop transitions, 57 changer transitions 1/330 dead transitions. [2024-06-27 16:52:25,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 330 transitions, 4767 flow [2024-06-27 16:52:25,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 16:52:25,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 16:52:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 144 transitions. [2024-06-27 16:52:25,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3096774193548387 [2024-06-27 16:52:25,107 INFO L175 Difference]: Start difference. First operand has 211 places, 293 transitions, 3730 flow. Second operand 15 states and 144 transitions. [2024-06-27 16:52:25,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 330 transitions, 4767 flow [2024-06-27 16:52:25,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 330 transitions, 4481 flow, removed 110 selfloop flow, removed 11 redundant places. [2024-06-27 16:52:25,301 INFO L231 Difference]: Finished difference. Result has 217 places, 302 transitions, 3887 flow [2024-06-27 16:52:25,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3444, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3887, PETRI_PLACES=217, PETRI_TRANSITIONS=302} [2024-06-27 16:52:25,302 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 186 predicate places. [2024-06-27 16:52:25,302 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 302 transitions, 3887 flow [2024-06-27 16:52:25,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.125) internal successors, (196), 32 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:52:25,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:52:25,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:52:25,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-06-27 16:52:25,504 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,SelfDestructingSolverStorable28 [2024-06-27 16:52:25,506 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:52:25,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:52:25,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1484042902, now seen corresponding path program 23 times [2024-06-27 16:52:25,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:52:25,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613661686] [2024-06-27 16:52:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:52:25,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:52:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:52:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:52:28,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:52:28,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613661686] [2024-06-27 16:52:28,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613661686] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:52:28,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810934883] [2024-06-27 16:52:28,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:52:28,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:52:28,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:52:28,009 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:52:28,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-06-27 16:52:28,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:52:28,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:52:28,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:52:28,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:52:31,835 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:52:31,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-06-27 16:52:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:52:31,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:52:32,929 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:52:32,929 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 95 [2024-06-27 16:52:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:52:34,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810934883] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:52:34,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:52:34,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 25 [2024-06-27 16:52:34,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453073570] [2024-06-27 16:52:34,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:52:34,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:52:34,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:52:34,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:52:34,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:52:34,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:52:34,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 302 transitions, 3887 flow. Second operand has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:52:34,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:52:34,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:52:34,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:52:42,592 INFO L124 PetriNetUnfolderBase]: 2799/4054 cut-off events. [2024-06-27 16:52:42,593 INFO L125 PetriNetUnfolderBase]: For 60283/60283 co-relation queries the response was YES. [2024-06-27 16:52:42,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23087 conditions, 4054 events. 2799/4054 cut-off events. For 60283/60283 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 19292 event pairs, 869 based on Foata normal form. 1/4055 useless extension candidates. Maximal degree in co-relation 22957. Up to 3890 conditions per place. [2024-06-27 16:52:42,634 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 278 selfloop transitions, 57 changer transitions 1/337 dead transitions. [2024-06-27 16:52:42,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 337 transitions, 4815 flow [2024-06-27 16:52:42,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:52:42,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:52:42,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 137 transitions. [2024-06-27 16:52:42,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3399503722084367 [2024-06-27 16:52:42,635 INFO L175 Difference]: Start difference. First operand has 217 places, 302 transitions, 3887 flow. Second operand 13 states and 137 transitions. [2024-06-27 16:52:42,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 337 transitions, 4815 flow [2024-06-27 16:52:42,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 337 transitions, 4525 flow, removed 114 selfloop flow, removed 10 redundant places. [2024-06-27 16:52:42,839 INFO L231 Difference]: Finished difference. Result has 221 places, 308 transitions, 3908 flow [2024-06-27 16:52:42,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3597, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3908, PETRI_PLACES=221, PETRI_TRANSITIONS=308} [2024-06-27 16:52:42,840 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 190 predicate places. [2024-06-27 16:52:42,840 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 308 transitions, 3908 flow [2024-06-27 16:52:42,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:52:42,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:52:42,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:52:42,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-06-27 16:52:43,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:52:43,041 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:52:43,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:52:43,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1430332368, now seen corresponding path program 24 times [2024-06-27 16:52:43,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:52:43,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742221055] [2024-06-27 16:52:43,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:52:43,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:52:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:52:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:52:46,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:52:46,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742221055] [2024-06-27 16:52:46,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742221055] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:52:46,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2906165] [2024-06-27 16:52:46,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:52:46,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:52:46,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:52:46,485 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:52:46,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-06-27 16:52:46,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:52:46,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:52:46,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 53 conjunts are in the unsatisfiable core [2024-06-27 16:52:46,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:52:46,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:52:47,168 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-06-27 16:52:47,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-06-27 16:52:47,804 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-06-27 16:52:47,805 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 16 treesize of output 18 [2024-06-27 16:52:50,341 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:52:50,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2024-06-27 16:52:51,989 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:52:51,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2024-06-27 16:52:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:52:52,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:52:53,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:52:53,369 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 171 treesize of output 191 [2024-06-27 16:52:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:52:59,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2906165] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:52:59,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:52:59,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 31 [2024-06-27 16:52:59,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504964800] [2024-06-27 16:52:59,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:52:59,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:52:59,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:52:59,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:52:59,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:52:59,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:52:59,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 308 transitions, 3908 flow. Second operand has 32 states, 32 states have (on average 6.0625) internal successors, (194), 32 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) [2024-06-27 16:52:59,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:52:59,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:52:59,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:53:07,913 INFO L124 PetriNetUnfolderBase]: 2903/4203 cut-off events. [2024-06-27 16:53:07,914 INFO L125 PetriNetUnfolderBase]: For 66893/66893 co-relation queries the response was YES. [2024-06-27 16:53:07,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24185 conditions, 4203 events. 2903/4203 cut-off events. For 66893/66893 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 20086 event pairs, 887 based on Foata normal form. 1/4204 useless extension candidates. Maximal degree in co-relation 24052. Up to 4021 conditions per place. [2024-06-27 16:53:07,953 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 281 selfloop transitions, 64 changer transitions 1/347 dead transitions. [2024-06-27 16:53:07,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 347 transitions, 5112 flow [2024-06-27 16:53:07,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 16:53:07,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 16:53:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 143 transitions. [2024-06-27 16:53:07,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30752688172043013 [2024-06-27 16:53:07,955 INFO L175 Difference]: Start difference. First operand has 221 places, 308 transitions, 3908 flow. Second operand 15 states and 143 transitions. [2024-06-27 16:53:07,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 347 transitions, 5112 flow [2024-06-27 16:53:08,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 347 transitions, 4866 flow, removed 72 selfloop flow, removed 9 redundant places. [2024-06-27 16:53:08,119 INFO L231 Difference]: Finished difference. Result has 228 places, 321 transitions, 4257 flow [2024-06-27 16:53:08,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3662, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4257, PETRI_PLACES=228, PETRI_TRANSITIONS=321} [2024-06-27 16:53:08,120 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 197 predicate places. [2024-06-27 16:53:08,120 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 321 transitions, 4257 flow [2024-06-27 16:53:08,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.0625) internal successors, (194), 32 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) [2024-06-27 16:53:08,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:53:08,121 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, 1, 1, 1, 1] [2024-06-27 16:53:08,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-06-27 16:53:08,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:53:08,333 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:53:08,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:53:08,334 INFO L85 PathProgramCache]: Analyzing trace with hash -859344304, now seen corresponding path program 25 times [2024-06-27 16:53:08,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:53:08,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420188790] [2024-06-27 16:53:08,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:53:08,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:53:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:53:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:53:11,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:53:11,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420188790] [2024-06-27 16:53:11,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420188790] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:53:11,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051192884] [2024-06-27 16:53:11,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:53:11,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:53:11,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:53:11,050 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:53:11,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-06-27 16:53:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:53:11,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2024-06-27 16:53:11,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:53:11,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:53:11,904 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:53:11,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 16:53:14,329 INFO L349 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2024-06-27 16:53:14,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-06-27 16:53:15,132 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 28 treesize of output 12 [2024-06-27 16:53:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:53:15,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:53:20,656 WARN L854 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (~B~0.offset Int)) (let ((.cse2 (* 4 |c_thread3Thread1of1ForFork0_~i~2#1|))) (let ((.cse0 (select (select |c_#memory_int#1| c_~B~0.base) (+ .cse2 ~B~0.offset))) (.cse1 (select (select |c_#memory_int#1| c_~A~0.base) (+ .cse2 c_~A~0.offset)))) (= (+ .cse0 c_~csum~0 .cse1) (+ (select (select (store |c_#memory_int#1| c_~C~0.base (store (select |c_#memory_int#1| c_~C~0.base) (+ .cse2 ~C~0.offset) (+ .cse0 .cse1))) c_~B~0.base) ~B~0.offset) c_~asum~0 c_~bsum~0))))) is different from false [2024-06-27 16:53:21,162 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:53:21,162 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 78 treesize of output 118 [2024-06-27 16:53:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2024-06-27 16:53:24,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051192884] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:53:24,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:53:24,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 30 [2024-06-27 16:53:24,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286350308] [2024-06-27 16:53:24,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:53:24,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:53:24,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:53:24,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:53:24,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=739, Unknown=1, NotChecked=56, Total=930 [2024-06-27 16:53:24,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:53:24,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 321 transitions, 4257 flow. Second operand has 31 states, 31 states have (on average 6.32258064516129) internal successors, (196), 31 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:53:24,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:53:24,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:53:24,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:53:36,919 INFO L124 PetriNetUnfolderBase]: 3025/4378 cut-off events. [2024-06-27 16:53:36,920 INFO L125 PetriNetUnfolderBase]: For 80149/80149 co-relation queries the response was YES. [2024-06-27 16:53:36,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25848 conditions, 4378 events. 3025/4378 cut-off events. For 80149/80149 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21140 event pairs, 907 based on Foata normal form. 1/4379 useless extension candidates. Maximal degree in co-relation 25713. Up to 4110 conditions per place. [2024-06-27 16:53:36,959 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 283 selfloop transitions, 75 changer transitions 1/360 dead transitions. [2024-06-27 16:53:36,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 360 transitions, 5477 flow [2024-06-27 16:53:36,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:53:36,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:53:36,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 139 transitions. [2024-06-27 16:53:36,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34491315136476425 [2024-06-27 16:53:36,961 INFO L175 Difference]: Start difference. First operand has 228 places, 321 transitions, 4257 flow. Second operand 13 states and 139 transitions. [2024-06-27 16:53:36,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 360 transitions, 5477 flow [2024-06-27 16:53:37,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 360 transitions, 5025 flow, removed 195 selfloop flow, removed 9 redundant places. [2024-06-27 16:53:37,208 INFO L231 Difference]: Finished difference. Result has 233 places, 331 transitions, 4401 flow [2024-06-27 16:53:37,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3805, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4401, PETRI_PLACES=233, PETRI_TRANSITIONS=331} [2024-06-27 16:53:37,209 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 202 predicate places. [2024-06-27 16:53:37,209 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 331 transitions, 4401 flow [2024-06-27 16:53:37,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.32258064516129) internal successors, (196), 31 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:53:37,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:53:37,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:53:37,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-06-27 16:53:37,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:53:37,425 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:53:37,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:53:37,425 INFO L85 PathProgramCache]: Analyzing trace with hash 144889206, now seen corresponding path program 26 times [2024-06-27 16:53:37,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:53:37,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498655348] [2024-06-27 16:53:37,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:53:37,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:53:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:53:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:53:40,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:53:40,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498655348] [2024-06-27 16:53:40,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498655348] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:53:40,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992496220] [2024-06-27 16:53:40,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:53:40,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:53:40,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:53:40,508 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:53:40,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-06-27 16:53:40,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:53:40,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:53:40,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 53 conjunts are in the unsatisfiable core [2024-06-27 16:53:40,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:53:40,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:53:41,211 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-06-27 16:53:41,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-06-27 16:53:41,844 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-06-27 16:53:41,844 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 16 treesize of output 18 [2024-06-27 16:53:44,390 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:53:44,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2024-06-27 16:53:46,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:53:46,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2024-06-27 16:53:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:53:46,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:53:47,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:53:47,572 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 171 treesize of output 191 [2024-06-27 16:53:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:53:53,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992496220] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:53:53,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:53:53,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2024-06-27 16:53:53,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441052808] [2024-06-27 16:53:53,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:53:53,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:53:53,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:53:53,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:53:53,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:53:53,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:53:53,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 331 transitions, 4401 flow. Second operand has 32 states, 32 states have (on average 6.28125) internal successors, (201), 32 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:53:53,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:53:53,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:53:53,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:54:04,521 INFO L124 PetriNetUnfolderBase]: 3147/4553 cut-off events. [2024-06-27 16:54:04,521 INFO L125 PetriNetUnfolderBase]: For 91872/91872 co-relation queries the response was YES. [2024-06-27 16:54:04,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27245 conditions, 4553 events. 3147/4553 cut-off events. For 91872/91872 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 22130 event pairs, 938 based on Foata normal form. 1/4554 useless extension candidates. Maximal degree in co-relation 27107. Up to 4289 conditions per place. [2024-06-27 16:54:04,571 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 295 selfloop transitions, 72 changer transitions 1/369 dead transitions. [2024-06-27 16:54:04,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 369 transitions, 5656 flow [2024-06-27 16:54:04,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:54:04,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:54:04,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 141 transitions. [2024-06-27 16:54:04,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3248847926267281 [2024-06-27 16:54:04,573 INFO L175 Difference]: Start difference. First operand has 233 places, 331 transitions, 4401 flow. Second operand 14 states and 141 transitions. [2024-06-27 16:54:04,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 369 transitions, 5656 flow [2024-06-27 16:54:04,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 369 transitions, 5194 flow, removed 191 selfloop flow, removed 8 redundant places. [2024-06-27 16:54:04,884 INFO L231 Difference]: Finished difference. Result has 240 places, 341 transitions, 4550 flow [2024-06-27 16:54:04,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3943, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4550, PETRI_PLACES=240, PETRI_TRANSITIONS=341} [2024-06-27 16:54:04,884 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 209 predicate places. [2024-06-27 16:54:04,884 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 341 transitions, 4550 flow [2024-06-27 16:54:04,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.28125) internal successors, (201), 32 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:04,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:54:04,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:54:04,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-06-27 16:54:05,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:05,099 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:54:05,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:54:05,100 INFO L85 PathProgramCache]: Analyzing trace with hash -627847494, now seen corresponding path program 27 times [2024-06-27 16:54:05,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:54:05,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296014838] [2024-06-27 16:54:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:54:05,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:54:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:54:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:54:08,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:54:08,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296014838] [2024-06-27 16:54:08,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296014838] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:54:08,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677744962] [2024-06-27 16:54:08,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:54:08,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:08,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:54:08,511 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:54:08,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-06-27 16:54:08,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:54:08,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:54:08,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 53 conjunts are in the unsatisfiable core [2024-06-27 16:54:08,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:54:08,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:54:09,272 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-06-27 16:54:09,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-06-27 16:54:09,886 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-06-27 16:54:09,886 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 16 treesize of output 18 [2024-06-27 16:54:12,874 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:54:12,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2024-06-27 16:54:14,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:54:14,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2024-06-27 16:54:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:54:14,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:54:15,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:54:15,066 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 195 treesize of output 215 [2024-06-27 16:54:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:54:21,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677744962] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:54:21,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:54:21,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2024-06-27 16:54:21,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369095094] [2024-06-27 16:54:21,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:54:21,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:54:21,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:54:21,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:54:21,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:54:21,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:54:21,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 341 transitions, 4550 flow. Second operand has 31 states, 31 states have (on average 6.129032258064516) internal successors, (190), 31 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:21,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:54:21,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:54:21,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:54:30,582 INFO L124 PetriNetUnfolderBase]: 3227/4668 cut-off events. [2024-06-27 16:54:30,582 INFO L125 PetriNetUnfolderBase]: For 91823/91823 co-relation queries the response was YES. [2024-06-27 16:54:30,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27585 conditions, 4668 events. 3227/4668 cut-off events. For 91823/91823 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 22788 event pairs, 1010 based on Foata normal form. 1/4669 useless extension candidates. Maximal degree in co-relation 27445. Up to 4513 conditions per place. [2024-06-27 16:54:30,626 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 315 selfloop transitions, 57 changer transitions 1/374 dead transitions. [2024-06-27 16:54:30,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 374 transitions, 5699 flow [2024-06-27 16:54:30,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:54:30,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:54:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 135 transitions. [2024-06-27 16:54:30,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31105990783410137 [2024-06-27 16:54:30,630 INFO L175 Difference]: Start difference. First operand has 240 places, 341 transitions, 4550 flow. Second operand 14 states and 135 transitions. [2024-06-27 16:54:30,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 374 transitions, 5699 flow [2024-06-27 16:54:30,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 374 transitions, 5237 flow, removed 193 selfloop flow, removed 9 redundant places. [2024-06-27 16:54:30,826 INFO L231 Difference]: Finished difference. Result has 247 places, 350 transitions, 4566 flow [2024-06-27 16:54:30,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4091, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4566, PETRI_PLACES=247, PETRI_TRANSITIONS=350} [2024-06-27 16:54:30,828 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 216 predicate places. [2024-06-27 16:54:30,828 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 350 transitions, 4566 flow [2024-06-27 16:54:30,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.129032258064516) internal successors, (190), 31 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:30,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:54:30,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:54:30,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-06-27 16:54:31,036 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,SelfDestructingSolverStorable33 [2024-06-27 16:54:31,036 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:54:31,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:54:31,037 INFO L85 PathProgramCache]: Analyzing trace with hash 941081048, now seen corresponding path program 28 times [2024-06-27 16:54:31,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:54:31,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24653528] [2024-06-27 16:54:31,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:54:31,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:54:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:54:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:34,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:54:34,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24653528] [2024-06-27 16:54:34,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24653528] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:54:34,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358395812] [2024-06-27 16:54:34,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:54:34,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:34,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:54:34,192 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:54:34,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-06-27 16:54:34,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:54:34,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:54:34,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 43 conjunts are in the unsatisfiable core [2024-06-27 16:54:34,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:54:34,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:54:34,920 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-06-27 16:54:34,920 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-06-27 16:54:35,277 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:54:35,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 16:54:38,255 INFO L349 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2024-06-27 16:54:38,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-06-27 16:54:38,690 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 28 treesize of output 12 [2024-06-27 16:54:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:54:38,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:54:43,200 WARN L854 $PredicateComparison]: unable to prove that (forall ((~A~0.offset Int) (~C~0.offset Int)) (let ((.cse2 (* 4 |c_thread3Thread1of1ForFork0_~i~2#1|))) (let ((.cse0 (select (select |c_#memory_int#1| c_~B~0.base) (+ .cse2 c_~B~0.offset))) (.cse1 (select (select |c_#memory_int#1| c_~A~0.base) (+ .cse2 ~A~0.offset)))) (= (+ .cse0 .cse1 c_~csum~0) (+ c_~asum~0 (select (select (store |c_#memory_int#1| c_~C~0.base (store (select |c_#memory_int#1| c_~C~0.base) (+ .cse2 ~C~0.offset) (+ .cse0 .cse1))) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) ~A~0.offset)) c_~bsum~0))))) is different from false [2024-06-27 16:54:43,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:54:43,653 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 90 treesize of output 134 [2024-06-27 16:54:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2024-06-27 16:54:47,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358395812] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:54:47,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:54:47,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 31 [2024-06-27 16:54:47,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523098444] [2024-06-27 16:54:47,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:54:47,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:54:47,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:54:47,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:54:47,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=798, Unknown=1, NotChecked=58, Total=992 [2024-06-27 16:54:47,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:54:47,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 350 transitions, 4566 flow. Second operand has 32 states, 32 states have (on average 6.0625) internal successors, (194), 32 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) [2024-06-27 16:54:47,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:54:47,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:54:47,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:54:58,028 INFO L124 PetriNetUnfolderBase]: 3297/4769 cut-off events. [2024-06-27 16:54:58,028 INFO L125 PetriNetUnfolderBase]: For 90554/90554 co-relation queries the response was YES. [2024-06-27 16:54:58,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27739 conditions, 4769 events. 3297/4769 cut-off events. For 90554/90554 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23433 event pairs, 1035 based on Foata normal form. 1/4770 useless extension candidates. Maximal degree in co-relation 27595. Up to 4614 conditions per place. [2024-06-27 16:54:58,079 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 321 selfloop transitions, 57 changer transitions 1/380 dead transitions. [2024-06-27 16:54:58,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 380 transitions, 5707 flow [2024-06-27 16:54:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:54:58,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:54:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 135 transitions. [2024-06-27 16:54:58,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31105990783410137 [2024-06-27 16:54:58,080 INFO L175 Difference]: Start difference. First operand has 247 places, 350 transitions, 4566 flow. Second operand 14 states and 135 transitions. [2024-06-27 16:54:58,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 380 transitions, 5707 flow [2024-06-27 16:54:58,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 380 transitions, 5355 flow, removed 145 selfloop flow, removed 9 redundant places. [2024-06-27 16:54:58,344 INFO L231 Difference]: Finished difference. Result has 253 places, 356 transitions, 4662 flow [2024-06-27 16:54:58,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4214, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4662, PETRI_PLACES=253, PETRI_TRANSITIONS=356} [2024-06-27 16:54:58,345 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 222 predicate places. [2024-06-27 16:54:58,345 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 356 transitions, 4662 flow [2024-06-27 16:54:58,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.0625) internal successors, (194), 32 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) [2024-06-27 16:54:58,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:54:58,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:54:58,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-06-27 16:54:58,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:58,558 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:54:58,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:54:58,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1169142740, now seen corresponding path program 29 times [2024-06-27 16:54:58,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:54:58,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094905036] [2024-06-27 16:54:58,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:54:58,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:54:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:55:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:55:01,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:55:01,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094905036] [2024-06-27 16:55:01,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094905036] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:55:01,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615661937] [2024-06-27 16:55:01,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:55:01,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:55:01,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:55:01,604 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:55:01,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-06-27 16:55:01,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:55:01,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:55:01,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 55 conjunts are in the unsatisfiable core [2024-06-27 16:55:01,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:55:01,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:55:02,391 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-06-27 16:55:02,391 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-06-27 16:55:03,080 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-06-27 16:55:03,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-06-27 16:55:05,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2024-06-27 16:55:07,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2024-06-27 16:55:08,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:55:08,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:55:09,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:55:09,269 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 171 treesize of output 191 [2024-06-27 16:55:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:55:17,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615661937] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:55:17,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:55:17,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2024-06-27 16:55:17,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568549867] [2024-06-27 16:55:17,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:55:17,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:55:17,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:55:17,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:55:17,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:55:17,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:55:17,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 356 transitions, 4662 flow. Second operand has 31 states, 31 states have (on average 6.193548387096774) internal successors, (192), 31 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:55:17,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:55:17,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:55:17,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:55:27,520 INFO L124 PetriNetUnfolderBase]: 3367/4870 cut-off events. [2024-06-27 16:55:27,520 INFO L125 PetriNetUnfolderBase]: For 96200/96200 co-relation queries the response was YES. [2024-06-27 16:55:27,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28428 conditions, 4870 events. 3367/4870 cut-off events. For 96200/96200 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 24004 event pairs, 1058 based on Foata normal form. 1/4871 useless extension candidates. Maximal degree in co-relation 28281. Up to 4689 conditions per place. [2024-06-27 16:55:27,568 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 319 selfloop transitions, 66 changer transitions 1/387 dead transitions. [2024-06-27 16:55:27,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 387 transitions, 5833 flow [2024-06-27 16:55:27,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:55:27,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:55:27,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 137 transitions. [2024-06-27 16:55:27,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.315668202764977 [2024-06-27 16:55:27,569 INFO L175 Difference]: Start difference. First operand has 253 places, 356 transitions, 4662 flow. Second operand 14 states and 137 transitions. [2024-06-27 16:55:27,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 387 transitions, 5833 flow [2024-06-27 16:55:27,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 387 transitions, 5473 flow, removed 147 selfloop flow, removed 10 redundant places. [2024-06-27 16:55:27,753 INFO L231 Difference]: Finished difference. Result has 258 places, 362 transitions, 4780 flow [2024-06-27 16:55:27,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4302, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4780, PETRI_PLACES=258, PETRI_TRANSITIONS=362} [2024-06-27 16:55:27,754 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 227 predicate places. [2024-06-27 16:55:27,754 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 362 transitions, 4780 flow [2024-06-27 16:55:27,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.193548387096774) internal successors, (192), 31 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:55:27,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:55:27,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:55:27,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-06-27 16:55:27,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:55:27,958 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:55:27,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:55:27,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1513539834, now seen corresponding path program 30 times [2024-06-27 16:55:27,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:55:27,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850615194] [2024-06-27 16:55:27,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:55:27,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:55:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:55:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:55:31,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:55:31,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850615194] [2024-06-27 16:55:31,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850615194] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:55:31,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970779621] [2024-06-27 16:55:31,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:55:31,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:55:31,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:55:31,220 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:55:31,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-06-27 16:55:31,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:55:31,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:55:31,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 55 conjunts are in the unsatisfiable core [2024-06-27 16:55:31,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:55:31,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:55:32,005 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-06-27 16:55:32,006 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-06-27 16:55:32,690 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-06-27 16:55:32,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-06-27 16:55:35,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2024-06-27 16:55:37,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2024-06-27 16:55:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:55:37,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:55:38,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:55:38,576 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 195 treesize of output 215 [2024-06-27 16:55:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:55:45,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970779621] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:55:45,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:55:45,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2024-06-27 16:55:45,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158352037] [2024-06-27 16:55:45,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:55:45,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:55:45,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:55:45,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:55:45,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:55:45,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:55:45,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 362 transitions, 4780 flow. Second operand has 31 states, 31 states have (on average 6.258064516129032) internal successors, (194), 31 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) [2024-06-27 16:55:45,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:55:45,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:55:45,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:55:56,797 INFO L124 PetriNetUnfolderBase]: 3441/4977 cut-off events. [2024-06-27 16:55:56,797 INFO L125 PetriNetUnfolderBase]: For 97396/97396 co-relation queries the response was YES. [2024-06-27 16:55:56,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28943 conditions, 4977 events. 3441/4977 cut-off events. For 97396/97396 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 24647 event pairs, 1080 based on Foata normal form. 1/4978 useless extension candidates. Maximal degree in co-relation 28793. Up to 4817 conditions per place. [2024-06-27 16:55:56,841 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 334 selfloop transitions, 57 changer transitions 1/393 dead transitions. [2024-06-27 16:55:56,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 393 transitions, 5857 flow [2024-06-27 16:55:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:55:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:55:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 136 transitions. [2024-06-27 16:55:56,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31336405529953915 [2024-06-27 16:55:56,842 INFO L175 Difference]: Start difference. First operand has 258 places, 362 transitions, 4780 flow. Second operand 14 states and 136 transitions. [2024-06-27 16:55:56,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 393 transitions, 5857 flow [2024-06-27 16:55:57,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 393 transitions, 5473 flow, removed 153 selfloop flow, removed 10 redundant places. [2024-06-27 16:55:57,079 INFO L231 Difference]: Finished difference. Result has 263 places, 368 transitions, 4755 flow [2024-06-27 16:55:57,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4396, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4755, PETRI_PLACES=263, PETRI_TRANSITIONS=368} [2024-06-27 16:55:57,079 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 232 predicate places. [2024-06-27 16:55:57,080 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 368 transitions, 4755 flow [2024-06-27 16:55:57,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.258064516129032) internal successors, (194), 31 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) [2024-06-27 16:55:57,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:55:57,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:55:57,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-06-27 16:55:57,292 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,SelfDestructingSolverStorable36 [2024-06-27 16:55:57,293 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:55:57,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:55:57,293 INFO L85 PathProgramCache]: Analyzing trace with hash -2113489866, now seen corresponding path program 31 times [2024-06-27 16:55:57,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:55:57,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309445582] [2024-06-27 16:55:57,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:55:57,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:55:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:55:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:55:59,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:55:59,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309445582] [2024-06-27 16:55:59,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309445582] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:55:59,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473886360] [2024-06-27 16:55:59,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:55:59,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:55:59,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:55:59,961 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:55:59,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-06-27 16:56:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:56:00,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:56:00,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:56:03,014 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:56:03,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2024-06-27 16:56:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:56:03,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:56:36,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:56:36,328 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 95 [2024-06-27 16:56:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:56:38,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473886360] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:56:38,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:56:38,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2024-06-27 16:56:38,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138946239] [2024-06-27 16:56:38,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:56:38,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:56:38,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:56:38,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:56:38,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=457, Unknown=6, NotChecked=0, Total=552 [2024-06-27 16:56:38,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:56:38,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 368 transitions, 4755 flow. Second operand has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:56:38,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:56:38,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:56:38,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:56:50,713 INFO L124 PetriNetUnfolderBase]: 3516/5086 cut-off events. [2024-06-27 16:56:50,713 INFO L125 PetriNetUnfolderBase]: For 99626/99626 co-relation queries the response was YES. [2024-06-27 16:56:50,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29410 conditions, 5086 events. 3516/5086 cut-off events. For 99626/99626 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 25366 event pairs, 1106 based on Foata normal form. 1/5087 useless extension candidates. Maximal degree in co-relation 29257. Up to 4922 conditions per place. [2024-06-27 16:56:50,755 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 341 selfloop transitions, 58 changer transitions 1/401 dead transitions. [2024-06-27 16:56:50,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 401 transitions, 5860 flow [2024-06-27 16:56:50,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:56:50,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:56:50,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 135 transitions. [2024-06-27 16:56:50,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3349875930521092 [2024-06-27 16:56:50,757 INFO L175 Difference]: Start difference. First operand has 263 places, 368 transitions, 4755 flow. Second operand 13 states and 135 transitions. [2024-06-27 16:56:50,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 401 transitions, 5860 flow [2024-06-27 16:56:50,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 401 transitions, 5562 flow, removed 96 selfloop flow, removed 11 redundant places. [2024-06-27 16:56:50,991 INFO L231 Difference]: Finished difference. Result has 266 places, 374 transitions, 4824 flow [2024-06-27 16:56:50,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4457, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4824, PETRI_PLACES=266, PETRI_TRANSITIONS=374} [2024-06-27 16:56:50,991 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 235 predicate places. [2024-06-27 16:56:50,991 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 374 transitions, 4824 flow [2024-06-27 16:56:50,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:56:50,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:56:50,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:56:51,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-06-27 16:56:51,197 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,SelfDestructingSolverStorable37 [2024-06-27 16:56:51,198 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:56:51,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:56:51,199 INFO L85 PathProgramCache]: Analyzing trace with hash -168297076, now seen corresponding path program 32 times [2024-06-27 16:56:51,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:56:51,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931808417] [2024-06-27 16:56:51,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:56:51,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:56:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:56:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:56:54,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:56:54,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931808417] [2024-06-27 16:56:54,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931808417] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:56:54,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725331052] [2024-06-27 16:56:54,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:56:54,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:56:54,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:56:54,009 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:56:54,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-06-27 16:56:54,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:56:54,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:56:54,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 48 conjunts are in the unsatisfiable core [2024-06-27 16:56:54,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:56:54,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:56:55,143 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:56:55,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 16:56:58,798 INFO L349 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2024-06-27 16:56:58,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-06-27 16:57:00,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:00,521 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 66 treesize of output 94 [2024-06-27 16:57:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:00,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:13,970 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:13,970 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 90 treesize of output 134 [2024-06-27 16:57:18,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:18,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725331052] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:18,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:18,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2024-06-27 16:57:18,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018466634] [2024-06-27 16:57:18,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:18,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:57:18,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:18,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:57:18,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:57:18,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:57:18,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 374 transitions, 4824 flow. Second operand has 30 states, 30 states have (on average 6.333333333333333) internal successors, (190), 30 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:57:18,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:18,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:57:18,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:28,437 INFO L124 PetriNetUnfolderBase]: 3590/5193 cut-off events. [2024-06-27 16:57:28,438 INFO L125 PetriNetUnfolderBase]: For 107826/107826 co-relation queries the response was YES. [2024-06-27 16:57:28,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30007 conditions, 5193 events. 3590/5193 cut-off events. For 107826/107826 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 25997 event pairs, 1152 based on Foata normal form. 1/5194 useless extension candidates. Maximal degree in co-relation 29851. Up to 5031 conditions per place. [2024-06-27 16:57:28,487 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 346 selfloop transitions, 58 changer transitions 1/406 dead transitions. [2024-06-27 16:57:28,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 406 transitions, 5936 flow [2024-06-27 16:57:28,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:57:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:57:28,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 134 transitions. [2024-06-27 16:57:28,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3325062034739454 [2024-06-27 16:57:28,488 INFO L175 Difference]: Start difference. First operand has 266 places, 374 transitions, 4824 flow. Second operand 13 states and 134 transitions. [2024-06-27 16:57:28,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 406 transitions, 5936 flow [2024-06-27 16:57:28,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 406 transitions, 5624 flow, removed 102 selfloop flow, removed 10 redundant places. [2024-06-27 16:57:28,707 INFO L231 Difference]: Finished difference. Result has 270 places, 380 transitions, 4879 flow [2024-06-27 16:57:28,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4512, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4879, PETRI_PLACES=270, PETRI_TRANSITIONS=380} [2024-06-27 16:57:28,708 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 239 predicate places. [2024-06-27 16:57:28,708 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 380 transitions, 4879 flow [2024-06-27 16:57:28,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.333333333333333) internal successors, (190), 30 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:57:28,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:28,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:28,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-06-27 16:57:28,914 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,SelfDestructingSolverStorable38 [2024-06-27 16:57:28,915 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:57:28,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:28,916 INFO L85 PathProgramCache]: Analyzing trace with hash -30202408, now seen corresponding path program 33 times [2024-06-27 16:57:28,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:28,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299317382] [2024-06-27 16:57:28,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:28,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:57:31,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:31,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299317382] [2024-06-27 16:57:31,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299317382] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:31,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539864581] [2024-06-27 16:57:31,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:57:31,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:31,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:31,992 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:57:32,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-06-27 16:57:32,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:57:32,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:32,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 48 conjunts are in the unsatisfiable core [2024-06-27 16:57:32,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:32,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:57:33,161 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:57:33,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 16:57:37,173 INFO L349 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2024-06-27 16:57:37,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-06-27 16:57:38,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:38,415 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 66 treesize of output 94 [2024-06-27 16:57:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:38,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:56,914 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:56,914 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 78 treesize of output 118 [2024-06-27 16:58:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:58:00,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539864581] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:58:00,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:58:00,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2024-06-27 16:58:00,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045801590] [2024-06-27 16:58:00,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:58:00,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:58:00,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:58:00,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:58:00,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=741, Unknown=3, NotChecked=0, Total=870 [2024-06-27 16:58:00,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:58:00,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 380 transitions, 4879 flow. Second operand has 30 states, 30 states have (on average 6.333333333333333) internal successors, (190), 30 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:58:00,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:58:00,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:58:00,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:58:10,071 INFO L124 PetriNetUnfolderBase]: 3664/5300 cut-off events. [2024-06-27 16:58:10,072 INFO L125 PetriNetUnfolderBase]: For 112039/112039 co-relation queries the response was YES. [2024-06-27 16:58:10,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30585 conditions, 5300 events. 3664/5300 cut-off events. For 112039/112039 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 26700 event pairs, 1144 based on Foata normal form. 1/5301 useless extension candidates. Maximal degree in co-relation 30428. Up to 5107 conditions per place. [2024-06-27 16:58:10,124 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 343 selfloop transitions, 69 changer transitions 1/414 dead transitions. [2024-06-27 16:58:10,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 414 transitions, 6026 flow [2024-06-27 16:58:10,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:58:10,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:58:10,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 137 transitions. [2024-06-27 16:58:10,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3399503722084367 [2024-06-27 16:58:10,126 INFO L175 Difference]: Start difference. First operand has 270 places, 380 transitions, 4879 flow. Second operand 13 states and 137 transitions. [2024-06-27 16:58:10,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 414 transitions, 6026 flow [2024-06-27 16:58:10,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 414 transitions, 5720 flow, removed 99 selfloop flow, removed 10 redundant places. [2024-06-27 16:58:10,329 INFO L231 Difference]: Finished difference. Result has 274 places, 386 transitions, 4974 flow [2024-06-27 16:58:10,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4573, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4974, PETRI_PLACES=274, PETRI_TRANSITIONS=386} [2024-06-27 16:58:10,330 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 243 predicate places. [2024-06-27 16:58:10,330 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 386 transitions, 4974 flow [2024-06-27 16:58:10,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.333333333333333) internal successors, (190), 30 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:58:10,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:58:10,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:58:10,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-06-27 16:58:10,537 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,SelfDestructingSolverStorable39 [2024-06-27 16:58:10,538 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:58:10,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:58:10,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1423693902, now seen corresponding path program 34 times [2024-06-27 16:58:10,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:58:10,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135242246] [2024-06-27 16:58:10,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:58:10,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:58:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:58:13,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:58:13,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135242246] [2024-06-27 16:58:13,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135242246] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:58:13,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041687113] [2024-06-27 16:58:13,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:58:13,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:13,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:58:13,590 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:58:13,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-06-27 16:58:13,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:58:13,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:58:13,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2024-06-27 16:58:13,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:58:14,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:58:14,475 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:58:14,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 16:58:17,693 INFO L349 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2024-06-27 16:58:17,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-06-27 16:58:18,201 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 28 treesize of output 12 [2024-06-27 16:58:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:58:18,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:58:22,782 WARN L854 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (~B~0.offset Int)) (let ((.cse2 (* 4 |c_thread3Thread1of1ForFork0_~i~2#1|))) (let ((.cse0 (select (select |c_#memory_int#1| c_~B~0.base) (+ .cse2 ~B~0.offset))) (.cse1 (select (select |c_#memory_int#1| c_~A~0.base) (+ .cse2 c_~A~0.offset)))) (= (+ .cse0 c_~csum~0 .cse1) (+ c_~asum~0 c_~bsum~0 (select (select (store |c_#memory_int#1| c_~C~0.base (store (select |c_#memory_int#1| c_~C~0.base) (+ .cse2 ~C~0.offset) (+ .cse0 .cse1))) c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) ~B~0.offset))))))) is different from false [2024-06-27 16:58:26,897 WARN L854 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (~B~0.offset Int)) (let ((.cse0 (select (select |c_#memory_int#1| c_~A~0.base) c_~A~0.offset)) (.cse1 (select (select |c_#memory_int#1| c_~B~0.base) ~B~0.offset))) (= (+ c_~csum~0 .cse0 .cse1) (+ c_~asum~0 c_~bsum~0 (select (select (store |c_#memory_int#1| c_~C~0.base (store (select |c_#memory_int#1| c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) ~B~0.offset)))))) is different from false [2024-06-27 16:58:27,423 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:58:27,423 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 74 treesize of output 118 [2024-06-27 16:58:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2024-06-27 16:58:31,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041687113] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:58:31,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:58:31,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2024-06-27 16:58:31,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63796454] [2024-06-27 16:58:31,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:58:31,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:58:31,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:58:31,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:58:31,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=651, Unknown=2, NotChecked=106, Total=870 [2024-06-27 16:58:31,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:58:31,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 386 transitions, 4974 flow. Second operand has 30 states, 30 states have (on average 6.333333333333333) internal successors, (190), 30 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:58:31,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:58:31,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:58:31,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:58:43,398 INFO L124 PetriNetUnfolderBase]: 3714/5373 cut-off events. [2024-06-27 16:58:43,398 INFO L125 PetriNetUnfolderBase]: For 118379/118379 co-relation queries the response was YES. [2024-06-27 16:58:43,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31091 conditions, 5373 events. 3714/5373 cut-off events. For 118379/118379 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 27101 event pairs, 1177 based on Foata normal form. 1/5374 useless extension candidates. Maximal degree in co-relation 30932. Up to 5172 conditions per place. [2024-06-27 16:58:43,459 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 353 selfloop transitions, 67 changer transitions 1/422 dead transitions. [2024-06-27 16:58:43,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 422 transitions, 6155 flow [2024-06-27 16:58:43,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:58:43,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:58:43,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 139 transitions. [2024-06-27 16:58:43,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34491315136476425 [2024-06-27 16:58:43,461 INFO L175 Difference]: Start difference. First operand has 274 places, 386 transitions, 4974 flow. Second operand 13 states and 139 transitions. [2024-06-27 16:58:43,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 422 transitions, 6155 flow [2024-06-27 16:58:43,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 422 transitions, 5815 flow, removed 105 selfloop flow, removed 10 redundant places. [2024-06-27 16:58:43,763 INFO L231 Difference]: Finished difference. Result has 279 places, 392 transitions, 5060 flow [2024-06-27 16:58:43,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4634, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5060, PETRI_PLACES=279, PETRI_TRANSITIONS=392} [2024-06-27 16:58:43,765 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 248 predicate places. [2024-06-27 16:58:43,765 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 392 transitions, 5060 flow [2024-06-27 16:58:43,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.333333333333333) internal successors, (190), 30 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:58:43,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:58:43,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:58:43,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-06-27 16:58:43,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:43,978 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:58:43,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:58:43,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1134221742, now seen corresponding path program 35 times [2024-06-27 16:58:43,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:58:43,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121052091] [2024-06-27 16:58:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:58:43,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:58:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:46,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:58:46,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:58:46,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121052091] [2024-06-27 16:58:46,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121052091] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:58:46,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127819456] [2024-06-27 16:58:46,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:58:46,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:46,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:58:46,654 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:58:46,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-06-27 16:58:46,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:58:46,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:58:46,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:58:46,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:58:51,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:58:51,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-06-27 16:58:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:58:51,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:58:52,711 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:58:52,711 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 34 treesize of output 87 [2024-06-27 16:58:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:58:54,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127819456] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:58:54,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:58:54,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 25 [2024-06-27 16:58:54,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69429365] [2024-06-27 16:58:54,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:58:54,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:58:54,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:58:54,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:58:54,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:58:54,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:58:54,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 392 transitions, 5060 flow. Second operand has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:58:54,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:58:54,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:58:54,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:04,064 INFO L124 PetriNetUnfolderBase]: 3789/5482 cut-off events. [2024-06-27 16:59:04,065 INFO L125 PetriNetUnfolderBase]: For 123144/123144 co-relation queries the response was YES. [2024-06-27 16:59:04,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31729 conditions, 5482 events. 3789/5482 cut-off events. For 123144/123144 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 27799 event pairs, 1211 based on Foata normal form. 1/5483 useless extension candidates. Maximal degree in co-relation 31567. Up to 5279 conditions per place. [2024-06-27 16:59:04,124 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 360 selfloop transitions, 67 changer transitions 1/429 dead transitions. [2024-06-27 16:59:04,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 429 transitions, 6251 flow [2024-06-27 16:59:04,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:59:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:59:04,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 140 transitions. [2024-06-27 16:59:04,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34739454094292804 [2024-06-27 16:59:04,126 INFO L175 Difference]: Start difference. First operand has 279 places, 392 transitions, 5060 flow. Second operand 13 states and 140 transitions. [2024-06-27 16:59:04,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 429 transitions, 6251 flow [2024-06-27 16:59:04,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 429 transitions, 5901 flow, removed 113 selfloop flow, removed 9 redundant places. [2024-06-27 16:59:04,438 INFO L231 Difference]: Finished difference. Result has 284 places, 398 transitions, 5113 flow [2024-06-27 16:59:04,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4710, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5113, PETRI_PLACES=284, PETRI_TRANSITIONS=398} [2024-06-27 16:59:04,443 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 253 predicate places. [2024-06-27 16:59:04,443 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 398 transitions, 5113 flow [2024-06-27 16:59:04,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:04,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:04,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:59:04,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-06-27 16:59:04,654 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,SelfDestructingSolverStorable41 [2024-06-27 16:59:04,654 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:04,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:04,655 INFO L85 PathProgramCache]: Analyzing trace with hash -582994642, now seen corresponding path program 36 times [2024-06-27 16:59:04,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:04,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893782983] [2024-06-27 16:59:04,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:04,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:59:07,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:07,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893782983] [2024-06-27 16:59:07,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893782983] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:07,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141776482] [2024-06-27 16:59:07,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:59:07,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:07,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:07,474 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:59:07,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-06-27 16:59:07,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:59:07,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:07,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:59:07,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:11,934 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:59:11,935 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 28 treesize of output 20 [2024-06-27 16:59:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:12,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:13,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:59:13,466 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 34 treesize of output 87 [2024-06-27 16:59:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:14,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141776482] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:14,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:14,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 25 [2024-06-27 16:59:14,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731825376] [2024-06-27 16:59:14,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:14,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:59:14,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:14,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:59:14,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:59:14,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:59:14,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 398 transitions, 5113 flow. Second operand has 26 states, 26 states have (on average 6.615384615384615) internal successors, (172), 26 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:14,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:14,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:59:14,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:24,821 INFO L124 PetriNetUnfolderBase]: 3958/5727 cut-off events. [2024-06-27 16:59:24,822 INFO L125 PetriNetUnfolderBase]: For 156721/156721 co-relation queries the response was YES. [2024-06-27 16:59:24,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34494 conditions, 5727 events. 3958/5727 cut-off events. For 156721/156721 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 29223 event pairs, 1279 based on Foata normal form. 1/5728 useless extension candidates. Maximal degree in co-relation 34330. Up to 5476 conditions per place. [2024-06-27 16:59:24,884 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 385 selfloop transitions, 59 changer transitions 1/446 dead transitions. [2024-06-27 16:59:24,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 446 transitions, 6818 flow [2024-06-27 16:59:24,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:59:24,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:59:24,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 144 transitions. [2024-06-27 16:59:24,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573200992555831 [2024-06-27 16:59:24,886 INFO L175 Difference]: Start difference. First operand has 284 places, 398 transitions, 5113 flow. Second operand 13 states and 144 transitions. [2024-06-27 16:59:24,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 446 transitions, 6818 flow [2024-06-27 16:59:25,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 446 transitions, 6476 flow, removed 108 selfloop flow, removed 10 redundant places. [2024-06-27 16:59:25,365 INFO L231 Difference]: Finished difference. Result has 289 places, 411 transitions, 5613 flow [2024-06-27 16:59:25,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4771, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5613, PETRI_PLACES=289, PETRI_TRANSITIONS=411} [2024-06-27 16:59:25,366 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 258 predicate places. [2024-06-27 16:59:25,366 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 411 transitions, 5613 flow [2024-06-27 16:59:25,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.615384615384615) internal successors, (172), 26 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:25,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:25,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:59:25,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-06-27 16:59:25,577 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,SelfDestructingSolverStorable42 [2024-06-27 16:59:25,578 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:25,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:25,578 INFO L85 PathProgramCache]: Analyzing trace with hash 2022029750, now seen corresponding path program 37 times [2024-06-27 16:59:25,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:25,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384573257] [2024-06-27 16:59:25,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:25,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:59:28,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:28,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384573257] [2024-06-27 16:59:28,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384573257] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:28,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986917673] [2024-06-27 16:59:28,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:59:28,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:28,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:28,234 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:59:28,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-06-27 16:59:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:28,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:59:28,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:30,989 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:59:30,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2024-06-27 16:59:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:31,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:52,433 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:59:52,434 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 20 treesize of output 17 [2024-06-27 16:59:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:52,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986917673] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:52,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:52,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2024-06-27 16:59:52,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577336529] [2024-06-27 16:59:52,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:52,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:59:52,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:52,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:59:52,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=471, Unknown=4, NotChecked=0, Total=552 [2024-06-27 16:59:52,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 16:59:52,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 411 transitions, 5613 flow. Second operand has 24 states, 24 states have (on average 6.833333333333333) internal successors, (164), 24 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:52,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:52,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 16:59:52,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:00:04,204 INFO L124 PetriNetUnfolderBase]: 4155/6012 cut-off events. [2024-06-27 17:00:04,204 INFO L125 PetriNetUnfolderBase]: For 192197/192197 co-relation queries the response was YES. [2024-06-27 17:00:04,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37919 conditions, 6012 events. 4155/6012 cut-off events. For 192197/192197 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 30762 event pairs, 1135 based on Foata normal form. 1/6013 useless extension candidates. Maximal degree in co-relation 37752. Up to 5665 conditions per place. [2024-06-27 17:00:04,268 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 388 selfloop transitions, 74 changer transitions 1/464 dead transitions. [2024-06-27 17:00:04,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 464 transitions, 7512 flow [2024-06-27 17:00:04,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 17:00:04,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 17:00:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 146 transitions. [2024-06-27 17:00:04,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36228287841191065 [2024-06-27 17:00:04,275 INFO L175 Difference]: Start difference. First operand has 289 places, 411 transitions, 5613 flow. Second operand 13 states and 146 transitions. [2024-06-27 17:00:04,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 464 transitions, 7512 flow [2024-06-27 17:00:04,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 464 transitions, 6804 flow, removed 325 selfloop flow, removed 7 redundant places. [2024-06-27 17:00:04,873 INFO L231 Difference]: Finished difference. Result has 298 places, 427 transitions, 5931 flow [2024-06-27 17:00:04,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4905, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5931, PETRI_PLACES=298, PETRI_TRANSITIONS=427} [2024-06-27 17:00:04,873 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 267 predicate places. [2024-06-27 17:00:04,873 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 427 transitions, 5931 flow [2024-06-27 17:00:04,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.833333333333333) internal successors, (164), 24 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:00:04,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:00:04,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:00:04,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-06-27 17:00:05,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-06-27 17:00:05,086 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:00:05,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:00:05,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1035058538, now seen corresponding path program 38 times [2024-06-27 17:00:05,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:00:05,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296158991] [2024-06-27 17:00:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:00:05,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:00:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:00:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:00:07,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:00:07,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296158991] [2024-06-27 17:00:07,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296158991] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:00:07,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034342164] [2024-06-27 17:00:07,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:00:07,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:00:07,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:00:07,969 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:00:07,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-06-27 17:00:08,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:00:08,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:00:08,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 17:00:08,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:00:12,529 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:00:12,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-06-27 17:00:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:00:12,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:00:14,065 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:00:14,066 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 20 treesize of output 17 [2024-06-27 17:00:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:00:14,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034342164] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:00:14,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:00:14,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 25 [2024-06-27 17:00:14,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462939614] [2024-06-27 17:00:14,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:00:14,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 17:00:14,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:00:14,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 17:00:14,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2024-06-27 17:00:14,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 17:00:14,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 427 transitions, 5931 flow. Second operand has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 26 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) [2024-06-27 17:00:14,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:00:14,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 17:00:14,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:00:26,318 INFO L124 PetriNetUnfolderBase]: 4270/6177 cut-off events. [2024-06-27 17:00:26,318 INFO L125 PetriNetUnfolderBase]: For 186813/186813 co-relation queries the response was YES. [2024-06-27 17:00:26,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38230 conditions, 6177 events. 4270/6177 cut-off events. For 186813/186813 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 31736 event pairs, 1164 based on Foata normal form. 1/6178 useless extension candidates. Maximal degree in co-relation 38058. Up to 5877 conditions per place. [2024-06-27 17:00:26,385 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 389 selfloop transitions, 83 changer transitions 1/474 dead transitions. [2024-06-27 17:00:26,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 474 transitions, 7796 flow [2024-06-27 17:00:26,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 17:00:26,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 17:00:26,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 138 transitions. [2024-06-27 17:00:26,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3424317617866005 [2024-06-27 17:00:26,386 INFO L175 Difference]: Start difference. First operand has 298 places, 427 transitions, 5931 flow. Second operand 13 states and 138 transitions. [2024-06-27 17:00:26,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 474 transitions, 7796 flow [2024-06-27 17:00:27,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 474 transitions, 6538 flow, removed 603 selfloop flow, removed 6 redundant places. [2024-06-27 17:00:27,122 INFO L231 Difference]: Finished difference. Result has 308 places, 446 transitions, 5747 flow [2024-06-27 17:00:27,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5127, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5747, PETRI_PLACES=308, PETRI_TRANSITIONS=446} [2024-06-27 17:00:27,123 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 277 predicate places. [2024-06-27 17:00:27,123 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 446 transitions, 5747 flow [2024-06-27 17:00:27,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 26 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) [2024-06-27 17:00:27,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:00:27,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:00:27,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-06-27 17:00:27,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:00:27,335 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:00:27,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:00:27,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1329266036, now seen corresponding path program 39 times [2024-06-27 17:00:27,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:00:27,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882663045] [2024-06-27 17:00:27,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:00:27,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:00:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:00:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:00:31,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:00:31,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882663045] [2024-06-27 17:00:31,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882663045] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:00:31,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34228189] [2024-06-27 17:00:31,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:00:31,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:00:31,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:00:31,025 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:00:31,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-06-27 17:00:31,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:00:31,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:00:31,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 51 conjunts are in the unsatisfiable core [2024-06-27 17:00:31,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:00:31,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 17:00:31,877 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-06-27 17:00:31,877 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-06-27 17:00:32,496 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 17:00:32,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 17:00:36,367 INFO L349 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2024-06-27 17:00:36,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-06-27 17:00:37,532 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:00:37,532 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 76 treesize of output 96 [2024-06-27 17:00:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:00:38,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:00:45,641 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:00:45,642 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 52 treesize of output 40 [2024-06-27 17:00:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:00:48,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34228189] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:00:48,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:00:48,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 31 [2024-06-27 17:00:48,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418078692] [2024-06-27 17:00:48,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:00:48,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 17:00:48,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:00:48,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 17:00:48,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2024-06-27 17:00:48,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-06-27 17:00:48,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 446 transitions, 5747 flow. Second operand has 32 states, 32 states have (on average 6.0625) internal successors, (194), 32 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) [2024-06-27 17:00:48,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:00:48,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-06-27 17:00:48,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:00:59,584 INFO L124 PetriNetUnfolderBase]: 4340/6278 cut-off events. [2024-06-27 17:00:59,584 INFO L125 PetriNetUnfolderBase]: For 165114/165114 co-relation queries the response was YES. [2024-06-27 17:00:59,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36717 conditions, 6278 events. 4340/6278 cut-off events. For 165114/165114 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 32318 event pairs, 1185 based on Foata normal form. 1/6279 useless extension candidates. Maximal degree in co-relation 36540. Up to 5985 conditions per place. [2024-06-27 17:00:59,649 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 397 selfloop transitions, 82 changer transitions 1/481 dead transitions. [2024-06-27 17:00:59,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 481 transitions, 7253 flow [2024-06-27 17:00:59,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 17:00:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 17:00:59,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 141 transitions. [2024-06-27 17:00:59,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3248847926267281 [2024-06-27 17:00:59,651 INFO L175 Difference]: Start difference. First operand has 308 places, 446 transitions, 5747 flow. Second operand 14 states and 141 transitions. [2024-06-27 17:00:59,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 481 transitions, 7253 flow [2024-06-27 17:01:00,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 481 transitions, 6865 flow, removed 139 selfloop flow, removed 7 redundant places. [2024-06-27 17:01:00,133 INFO L231 Difference]: Finished difference. Result has 317 places, 453 transitions, 6018 flow [2024-06-27 17:01:00,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5381, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6018, PETRI_PLACES=317, PETRI_TRANSITIONS=453} [2024-06-27 17:01:00,134 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 286 predicate places. [2024-06-27 17:01:00,134 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 453 transitions, 6018 flow [2024-06-27 17:01:00,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.0625) internal successors, (194), 32 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) [2024-06-27 17:01:00,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:00,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:01:00,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-06-27 17:01:00,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:00,347 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:00,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:00,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1145289400, now seen corresponding path program 40 times [2024-06-27 17:01:00,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:00,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483034017] [2024-06-27 17:01:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:00,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:03,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:03,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483034017] [2024-06-27 17:01:03,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483034017] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:03,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221406726] [2024-06-27 17:01:03,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:01:03,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:03,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:01:03,181 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:01:03,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-06-27 17:01:03,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:01:03,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:01:03,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 17:01:03,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:01:06,118 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:01:06,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2024-06-27 17:01:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:01:06,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... Killed by 15