/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_91-arrayloop2_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 06:52:11,515 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 06:52:11,596 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 06:52:11,601 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 06:52:11,601 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 06:52:11,642 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 06:52:11,642 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 06:52:11,647 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 06:52:11,648 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 06:52:11,648 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 06:52:11,648 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 06:52:11,649 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 06:52:11,649 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 06:52:11,650 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 06:52:11,650 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 06:52:11,650 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 06:52:11,650 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 06:52:11,651 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 06:52:11,651 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 06:52:11,651 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 06:52:11,652 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 06:52:11,656 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 06:52:11,656 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 06:52:11,656 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 06:52:11,659 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 06:52:11,659 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 06:52:11,660 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 06:52:11,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 06:52:11,660 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 06:52:11,660 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 06:52:11,661 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 06:52:11,661 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 06:52:11,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 06:52:11,661 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 06:52:11,661 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 06:52:11,662 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 06:52:11,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 06:52:11,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 06:52:11,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 06:52:11,988 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 06:52:11,988 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 06:52:11,989 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_91-arrayloop2_racefree.i [2023-08-24 06:52:13,225 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 06:52:13,505 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 06:52:13,506 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_91-arrayloop2_racefree.i [2023-08-24 06:52:13,527 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/034c512b1/d047144654584b2b9b9b20de29106d72/FLAGaaf3a7771 [2023-08-24 06:52:13,540 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/034c512b1/d047144654584b2b9b9b20de29106d72 [2023-08-24 06:52:13,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 06:52:13,543 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 06:52:13,544 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 06:52:13,544 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 06:52:13,550 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 06:52:13,551 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:52:13" (1/1) ... [2023-08-24 06:52:13,552 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@442386eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:13, skipping insertion in model container [2023-08-24 06:52:13,553 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:52:13" (1/1) ... [2023-08-24 06:52:13,613 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 06:52:14,043 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_91-arrayloop2_racefree.i[47038,47051] [2023-08-24 06:52:14,053 WARN L1561 CHandler]: Possible shadowing of function new [2023-08-24 06:52:14,053 WARN L1561 CHandler]: Possible shadowing of function new [2023-08-24 06:52:14,053 WARN L1561 CHandler]: Possible shadowing of function new [2023-08-24 06:52:14,055 WARN L1561 CHandler]: Possible shadowing of function new [2023-08-24 06:52:14,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 06:52:14,104 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 06:52:14,134 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 06:52:14,136 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 06:52:14,146 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_91-arrayloop2_racefree.i[47038,47051] [2023-08-24 06:52:14,148 WARN L1561 CHandler]: Possible shadowing of function new [2023-08-24 06:52:14,149 WARN L1561 CHandler]: Possible shadowing of function new [2023-08-24 06:52:14,149 WARN L1561 CHandler]: Possible shadowing of function new [2023-08-24 06:52:14,149 WARN L1561 CHandler]: Possible shadowing of function new [2023-08-24 06:52:14,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 06:52:14,212 INFO L206 MainTranslator]: Completed translation [2023-08-24 06:52:14,213 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:14 WrapperNode [2023-08-24 06:52:14,213 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 06:52:14,214 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 06:52:14,214 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 06:52:14,214 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 06:52:14,220 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:14" (1/1) ... [2023-08-24 06:52:14,244 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:14" (1/1) ... [2023-08-24 06:52:14,273 INFO L138 Inliner]: procedures = 277, calls = 45, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 188 [2023-08-24 06:52:14,273 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 06:52:14,274 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 06:52:14,274 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 06:52:14,274 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 06:52:14,281 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:14" (1/1) ... [2023-08-24 06:52:14,282 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:14" (1/1) ... [2023-08-24 06:52:14,286 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:14" (1/1) ... [2023-08-24 06:52:14,286 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:14" (1/1) ... [2023-08-24 06:52:14,295 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:14" (1/1) ... [2023-08-24 06:52:14,299 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:14" (1/1) ... [2023-08-24 06:52:14,301 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:14" (1/1) ... [2023-08-24 06:52:14,302 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:14" (1/1) ... [2023-08-24 06:52:14,306 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 06:52:14,307 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 06:52:14,307 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 06:52:14,307 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 06:52:14,307 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:14" (1/1) ... [2023-08-24 06:52:14,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 06:52:14,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:52:14,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 06:52:14,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 06:52:14,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 06:52:14,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-24 06:52:14,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 06:52:14,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 06:52:14,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 06:52:14,388 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 06:52:14,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 06:52:14,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 06:52:14,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-24 06:52:14,389 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 06:52:14,389 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 06:52:14,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 06:52:14,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 06:52:14,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 06:52:14,391 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 06:52:14,531 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 06:52:14,533 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 06:52:14,868 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 06:52:14,874 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 06:52:14,874 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-24 06:52:14,876 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:52:14 BoogieIcfgContainer [2023-08-24 06:52:14,876 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 06:52:14,878 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 06:52:14,878 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 06:52:14,881 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 06:52:14,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 06:52:13" (1/3) ... [2023-08-24 06:52:14,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72fcada3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:52:14, skipping insertion in model container [2023-08-24 06:52:14,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:14" (2/3) ... [2023-08-24 06:52:14,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72fcada3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:52:14, skipping insertion in model container [2023-08-24 06:52:14,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:52:14" (3/3) ... [2023-08-24 06:52:14,883 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_91-arrayloop2_racefree.i [2023-08-24 06:52:14,898 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 06:52:14,898 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 06:52:14,898 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 06:52:14,958 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 06:52:15,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 188 transitions, 384 flow [2023-08-24 06:52:15,097 INFO L124 PetriNetUnfolderBase]: 26/206 cut-off events. [2023-08-24 06:52:15,097 INFO L125 PetriNetUnfolderBase]: For 1/2 co-relation queries the response was YES. [2023-08-24 06:52:15,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 206 events. 26/206 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 512 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 110. Up to 4 conditions per place. [2023-08-24 06:52:15,104 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 188 transitions, 384 flow [2023-08-24 06:52:15,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 183 transitions, 371 flow [2023-08-24 06:52:15,117 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:52:15,125 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 183 transitions, 371 flow [2023-08-24 06:52:15,127 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 183 transitions, 371 flow [2023-08-24 06:52:15,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 183 transitions, 371 flow [2023-08-24 06:52:15,158 INFO L124 PetriNetUnfolderBase]: 25/201 cut-off events. [2023-08-24 06:52:15,158 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:52:15,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 201 events. 25/201 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 453 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 110. Up to 4 conditions per place. [2023-08-24 06:52:15,162 INFO L119 LiptonReduction]: Number of co-enabled transitions 4176 [2023-08-24 06:52:46,798 WARN L234 SmtUtils]: Spent 5.20s on a formula simplification that was a NOOP. DAG size: 172 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-24 06:52:52,430 WARN L234 SmtUtils]: Spent 5.63s on a formula simplification that was a NOOP. DAG size: 172 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-24 06:52:52,702 INFO L134 LiptonReduction]: Checked pairs total: 3913 [2023-08-24 06:52:52,702 INFO L136 LiptonReduction]: Total number of compositions: 177 [2023-08-24 06:52:52,713 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:52:52,716 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@51cbefef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:52:52,716 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:52:52,720 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:52:52,721 INFO L124 PetriNetUnfolderBase]: 4/19 cut-off events. [2023-08-24 06:52:52,721 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:52:52,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:52:52,721 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-24 06:52:52,722 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:52:52,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:52:52,726 INFO L85 PathProgramCache]: Analyzing trace with hash 635294193, now seen corresponding path program 1 times [2023-08-24 06:52:52,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:52:52,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653467441] [2023-08-24 06:52:52,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:52:52,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:52:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:52:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:52:53,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:52:53,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653467441] [2023-08-24 06:52:53,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653467441] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:52:53,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:52:53,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 06:52:53,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8208885] [2023-08-24 06:52:53,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:52:53,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:52:53,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:52:53,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:52:53,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:52:53,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 365 [2023-08-24 06:52:53,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 36 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:53,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:52:53,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 365 [2023-08-24 06:52:53,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:52:53,222 INFO L124 PetriNetUnfolderBase]: 48/113 cut-off events. [2023-08-24 06:52:53,222 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:52:53,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 113 events. 48/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 286 event pairs, 33 based on Foata normal form. 8/93 useless extension candidates. Maximal degree in co-relation 188. Up to 97 conditions per place. [2023-08-24 06:52:53,224 INFO L140 encePairwiseOnDemand]: 352/365 looper letters, 23 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-24 06:52:53,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 113 flow [2023-08-24 06:52:53,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 06:52:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 06:52:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-08-24 06:52:53,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602739726027397 [2023-08-24 06:52:53,244 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-08-24 06:52:53,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-08-24 06:52:53,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:52:53,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-08-24 06:52:53,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:53,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:53,257 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:53,258 INFO L175 Difference]: Start difference. First operand has 25 places, 36 transitions, 77 flow. Second operand 3 states and 504 transitions. [2023-08-24 06:52:53,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 113 flow [2023-08-24 06:52:53,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 113 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 06:52:53,261 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 69 flow [2023-08-24 06:52:53,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-08-24 06:52:53,265 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-08-24 06:52:53,266 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 69 flow [2023-08-24 06:52:53,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:53,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:52:53,266 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:52:53,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 06:52:53,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:52:53,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:52:53,267 INFO L85 PathProgramCache]: Analyzing trace with hash 848044642, now seen corresponding path program 1 times [2023-08-24 06:52:53,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:52:53,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625586569] [2023-08-24 06:52:53,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:52:53,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:52:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:52:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:52:53,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:52:53,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625586569] [2023-08-24 06:52:53,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625586569] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:52:53,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:52:53,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 06:52:53,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918259832] [2023-08-24 06:52:53,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:52:53,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:52:53,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:52:53,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:52:53,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:52:53,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 365 [2023-08-24 06:52:53,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:53,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:52:53,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 365 [2023-08-24 06:52:53,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:52:53,544 INFO L124 PetriNetUnfolderBase]: 48/115 cut-off events. [2023-08-24 06:52:53,545 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:52:53,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 115 events. 48/115 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 287 event pairs, 33 based on Foata normal form. 2/92 useless extension candidates. Maximal degree in co-relation 212. Up to 100 conditions per place. [2023-08-24 06:52:53,546 INFO L140 encePairwiseOnDemand]: 362/365 looper letters, 22 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-08-24 06:52:53,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 119 flow [2023-08-24 06:52:53,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 06:52:53,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 06:52:53,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-24 06:52:53,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575342465753425 [2023-08-24 06:52:53,551 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-24 06:52:53,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-24 06:52:53,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:52:53,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-24 06:52:53,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:53,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:53,559 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:53,561 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 69 flow. Second operand 3 states and 501 transitions. [2023-08-24 06:52:53,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 119 flow [2023-08-24 06:52:53,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 117 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 06:52:53,568 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 81 flow [2023-08-24 06:52:53,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-08-24 06:52:53,569 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-08-24 06:52:53,569 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 81 flow [2023-08-24 06:52:53,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:53,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:52:53,570 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:52:53,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 06:52:53,570 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:52:53,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:52:53,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1154512290, now seen corresponding path program 1 times [2023-08-24 06:52:53,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:52:53,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736351175] [2023-08-24 06:52:53,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:52:53,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:52:53,629 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-24 06:52:53,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429415036] [2023-08-24 06:52:53,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:52:53,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:52:53,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:52:53,637 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) [2023-08-24 06:52:53,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 06:52:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:52:53,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 06:52:53,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:52:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:52:53,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:52:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:52:53,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:52:53,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736351175] [2023-08-24 06:52:53,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-24 06:52:53,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429415036] [2023-08-24 06:52:53,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429415036] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:52:53,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-24 06:52:53,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-24 06:52:53,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466305741] [2023-08-24 06:52:53,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-24 06:52:53,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 06:52:53,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:52:53,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 06:52:53,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 06:52:53,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 365 [2023-08-24 06:52:53,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 81 flow. Second operand has 6 states, 6 states have (on average 160.83333333333334) internal successors, (965), 6 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:53,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:52:53,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 365 [2023-08-24 06:52:53,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:52:54,394 INFO L124 PetriNetUnfolderBase]: 48/121 cut-off events. [2023-08-24 06:52:54,394 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 06:52:54,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 121 events. 48/121 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 299 event pairs, 33 based on Foata normal form. 6/102 useless extension candidates. Maximal degree in co-relation 219. Up to 100 conditions per place. [2023-08-24 06:52:54,395 INFO L140 encePairwiseOnDemand]: 362/365 looper letters, 22 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2023-08-24 06:52:54,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 31 transitions, 147 flow [2023-08-24 06:52:54,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 06:52:54,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 06:52:54,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 983 transitions. [2023-08-24 06:52:54,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4488584474885845 [2023-08-24 06:52:54,399 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 983 transitions. [2023-08-24 06:52:54,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 983 transitions. [2023-08-24 06:52:54,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:52:54,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 983 transitions. [2023-08-24 06:52:54,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.83333333333334) internal successors, (983), 6 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:54,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 365.0) internal successors, (2555), 7 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:54,406 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 365.0) internal successors, (2555), 7 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:54,407 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 81 flow. Second operand 6 states and 983 transitions. [2023-08-24 06:52:54,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 31 transitions, 147 flow [2023-08-24 06:52:54,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 143 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 06:52:54,408 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 119 flow [2023-08-24 06:52:54,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=119, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-24 06:52:54,409 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2023-08-24 06:52:54,409 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 119 flow [2023-08-24 06:52:54,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 160.83333333333334) internal successors, (965), 6 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:54,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:52:54,410 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:52:54,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 06:52:54,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:52:54,617 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:52:54,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:52:54,617 INFO L85 PathProgramCache]: Analyzing trace with hash -198950558, now seen corresponding path program 2 times [2023-08-24 06:52:54,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:52:54,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242096616] [2023-08-24 06:52:54,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:52:54,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:52:54,690 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-24 06:52:54,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301567493] [2023-08-24 06:52:54,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 06:52:54,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:52:54,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:52:54,692 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) [2023-08-24 06:52:54,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 06:52:55,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 06:52:55,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 06:52:55,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 06:52:55,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:52:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:52:55,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:52:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:52:55,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:52:55,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242096616] [2023-08-24 06:52:55,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-24 06:52:55,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301567493] [2023-08-24 06:52:55,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301567493] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:52:55,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-24 06:52:55,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-08-24 06:52:55,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398167004] [2023-08-24 06:52:55,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-24 06:52:55,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 06:52:55,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:52:55,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 06:52:55,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-24 06:52:55,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 365 [2023-08-24 06:52:55,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 119 flow. Second operand has 12 states, 12 states have (on average 160.41666666666666) internal successors, (1925), 12 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:55,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:52:55,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 365 [2023-08-24 06:52:55,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:52:55,846 INFO L124 PetriNetUnfolderBase]: 48/133 cut-off events. [2023-08-24 06:52:55,846 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-08-24 06:52:55,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 133 events. 48/133 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 346 event pairs, 33 based on Foata normal form. 12/120 useless extension candidates. Maximal degree in co-relation 215. Up to 100 conditions per place. [2023-08-24 06:52:55,848 INFO L140 encePairwiseOnDemand]: 362/365 looper letters, 22 selfloop transitions, 11 changer transitions 0/37 dead transitions. [2023-08-24 06:52:55,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 221 flow [2023-08-24 06:52:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 06:52:55,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 06:52:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1946 transitions. [2023-08-24 06:52:55,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4442922374429224 [2023-08-24 06:52:55,855 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1946 transitions. [2023-08-24 06:52:55,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1946 transitions. [2023-08-24 06:52:55,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:52:55,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1946 transitions. [2023-08-24 06:52:55,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 162.16666666666666) internal successors, (1946), 12 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:55,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 365.0) internal successors, (4745), 13 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:55,875 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 365.0) internal successors, (4745), 13 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:55,875 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 119 flow. Second operand 12 states and 1946 transitions. [2023-08-24 06:52:55,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 221 flow [2023-08-24 06:52:55,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 37 transitions, 207 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 06:52:55,880 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 201 flow [2023-08-24 06:52:55,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=201, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2023-08-24 06:52:55,882 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 27 predicate places. [2023-08-24 06:52:55,882 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 201 flow [2023-08-24 06:52:55,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 160.41666666666666) internal successors, (1925), 12 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:55,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:52:55,883 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:52:55,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 06:52:56,091 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,SelfDestructingSolverStorable3 [2023-08-24 06:52:56,091 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:52:56,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:52:56,092 INFO L85 PathProgramCache]: Analyzing trace with hash 332029922, now seen corresponding path program 3 times [2023-08-24 06:52:56,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:52:56,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489635508] [2023-08-24 06:52:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:52:56,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:52:56,236 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-24 06:52:56,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668837006] [2023-08-24 06:52:56,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 06:52:56,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:52:56,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:52:56,237 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) [2023-08-24 06:52:56,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 06:52:56,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 06:52:56,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 06:52:56,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 06:52:56,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:52:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-24 06:52:56,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:52:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-24 06:52:56,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:52:56,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489635508] [2023-08-24 06:52:56,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-24 06:52:56,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668837006] [2023-08-24 06:52:56,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668837006] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:52:56,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-24 06:52:56,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-08-24 06:52:56,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855150865] [2023-08-24 06:52:56,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-24 06:52:56,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 06:52:56,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:52:56,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 06:52:56,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 06:52:56,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 365 [2023-08-24 06:52:56,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 201 flow. Second operand has 6 states, 6 states have (on average 158.16666666666666) internal successors, (949), 6 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:56,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:52:56,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 365 [2023-08-24 06:52:56,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:52:57,082 INFO L124 PetriNetUnfolderBase]: 50/160 cut-off events. [2023-08-24 06:52:57,082 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2023-08-24 06:52:57,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 160 events. 50/160 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 281 event pairs, 33 based on Foata normal form. 3/138 useless extension candidates. Maximal degree in co-relation 310. Up to 94 conditions per place. [2023-08-24 06:52:57,083 INFO L140 encePairwiseOnDemand]: 361/365 looper letters, 66 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-08-24 06:52:57,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 694 flow [2023-08-24 06:52:57,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 06:52:57,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 06:52:57,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 971 transitions. [2023-08-24 06:52:57,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44337899543378995 [2023-08-24 06:52:57,086 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 971 transitions. [2023-08-24 06:52:57,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 971 transitions. [2023-08-24 06:52:57,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:52:57,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 971 transitions. [2023-08-24 06:52:57,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.83333333333334) internal successors, (971), 6 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:57,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 365.0) internal successors, (2555), 7 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:57,092 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 365.0) internal successors, (2555), 7 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:57,092 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 201 flow. Second operand 6 states and 971 transitions. [2023-08-24 06:52:57,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 694 flow [2023-08-24 06:52:57,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 76 transitions, 500 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-08-24 06:52:57,097 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 236 flow [2023-08-24 06:52:57,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=236, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-08-24 06:52:57,098 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2023-08-24 06:52:57,098 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 236 flow [2023-08-24 06:52:57,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.16666666666666) internal successors, (949), 6 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:52:57,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:52:57,099 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 2, 1, 1, 1, 1, 1] [2023-08-24 06:52:57,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 06:52:57,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:52:57,305 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:52:57,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:52:57,306 INFO L85 PathProgramCache]: Analyzing trace with hash -2116370251, now seen corresponding path program 4 times [2023-08-24 06:52:57,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:52:57,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075911727] [2023-08-24 06:52:57,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:52:57,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:52:57,730 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-24 06:52:57,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920251651] [2023-08-24 06:52:57,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 06:52:57,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:52:57,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:52:57,732 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) [2023-08-24 06:52:57,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 06:53:00,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 06:53:00,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 06:53:00,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 9505 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 06:53:00,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:53:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-08-24 06:53:00,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:53:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-08-24 06:53:00,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:53:00,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075911727] [2023-08-24 06:53:00,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-24 06:53:00,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920251651] [2023-08-24 06:53:00,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920251651] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:53:00,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-24 06:53:00,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-08-24 06:53:00,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543412631] [2023-08-24 06:53:00,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-24 06:53:00,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 06:53:00,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:53:00,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 06:53:00,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-08-24 06:53:00,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 365 [2023-08-24 06:53:00,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 236 flow. Second operand has 24 states, 24 states have (on average 160.33333333333334) internal successors, (3848), 24 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:53:00,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:53:00,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 365 [2023-08-24 06:53:00,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:53:01,626 INFO L124 PetriNetUnfolderBase]: 50/208 cut-off events. [2023-08-24 06:53:01,626 INFO L125 PetriNetUnfolderBase]: For 3489/3489 co-relation queries the response was YES. [2023-08-24 06:53:01,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 208 events. 50/208 cut-off events. For 3489/3489 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 281 event pairs, 33 based on Foata normal form. 48/231 useless extension candidates. Maximal degree in co-relation 423. Up to 106 conditions per place. [2023-08-24 06:53:01,628 INFO L140 encePairwiseOnDemand]: 362/365 looper letters, 24 selfloop transitions, 24 changer transitions 0/52 dead transitions. [2023-08-24 06:53:01,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 52 transitions, 404 flow [2023-08-24 06:53:01,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 06:53:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 06:53:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3872 transitions. [2023-08-24 06:53:01,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420091324200913 [2023-08-24 06:53:01,638 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3872 transitions. [2023-08-24 06:53:01,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3872 transitions. [2023-08-24 06:53:01,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:53:01,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3872 transitions. [2023-08-24 06:53:01,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 161.33333333333334) internal successors, (3872), 24 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:53:01,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 365.0) internal successors, (9125), 25 states have internal predecessors, (9125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:53:01,663 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 365.0) internal successors, (9125), 25 states have internal predecessors, (9125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:53:01,663 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 236 flow. Second operand 24 states and 3872 transitions. [2023-08-24 06:53:01,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 52 transitions, 404 flow [2023-08-24 06:53:01,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 52 transitions, 396 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-24 06:53:01,668 INFO L231 Difference]: Finished difference. Result has 90 places, 52 transitions, 470 flow [2023-08-24 06:53:01,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=470, PETRI_PLACES=90, PETRI_TRANSITIONS=52} [2023-08-24 06:53:01,670 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 65 predicate places. [2023-08-24 06:53:01,670 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 52 transitions, 470 flow [2023-08-24 06:53:01,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 160.33333333333334) internal successors, (3848), 24 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:53:01,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:53:01,673 INFO L208 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 2, 1, 1, 1, 1, 1] [2023-08-24 06:53:01,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 06:53:01,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:53:01,889 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:53:01,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:53:01,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1441174603, now seen corresponding path program 5 times [2023-08-24 06:53:01,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:53:01,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983759630] [2023-08-24 06:53:01,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:53:01,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:53:02,685 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-24 06:53:02,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593772396] [2023-08-24 06:53:02,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 06:53:02,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:53:02,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:53:02,693 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) [2023-08-24 06:53:02,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Received shutdown request... [2023-08-24 07:06:53,792 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 07:06:53,792 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 07:06:54,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-08-24 07:06:54,993 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forcibly destroying the process [2023-08-24 07:06:55,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 137 [2023-08-24 07:06:55,029 ERROR L246 FreeRefinementEngine]: Caught known exception: Timeout or Toolchain cancelled by user [2023-08-24 07:06:55,031 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 07:06:55,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 07:06:55,031 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 104 with TraceHistMax 88,while AutomatonFreeRefinementEngine was Timeout during CAMEL. [2023-08-24 07:06:55,033 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1, 1] [2023-08-24 07:06:55,034 INFO L307 ceAbstractionStarter]: Result for error location InUseError was TIMEOUT (1/2) [2023-08-24 07:06:55,036 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 07:06:55,036 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 07:06:55,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 07:06:55 BasicIcfg [2023-08-24 07:06:55,039 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 07:06:55,040 INFO L158 Benchmark]: Toolchain (without parser) took 881496.73ms. Allocated memory was 356.5MB in the beginning and 557.8MB in the end (delta: 201.3MB). Free memory was 331.0MB in the beginning and 287.8MB in the end (delta: 43.2MB). Peak memory consumption was 246.5MB. Max. memory is 16.0GB. [2023-08-24 07:06:55,040 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 356.5MB. Free memory is still 333.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 07:06:55,040 INFO L158 Benchmark]: CACSL2BoogieTranslator took 669.22ms. Allocated memory is still 356.5MB. Free memory was 331.0MB in the beginning and 300.1MB in the end (delta: 30.9MB). Peak memory consumption was 31.5MB. Max. memory is 16.0GB. [2023-08-24 07:06:55,040 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.85ms. Allocated memory is still 356.5MB. Free memory was 300.1MB in the beginning and 297.3MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 07:06:55,040 INFO L158 Benchmark]: Boogie Preprocessor took 31.99ms. Allocated memory is still 356.5MB. Free memory was 297.3MB in the beginning and 294.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 07:06:55,041 INFO L158 Benchmark]: RCFGBuilder took 569.89ms. Allocated memory is still 356.5MB. Free memory was 294.9MB in the beginning and 327.1MB in the end (delta: -32.2MB). Peak memory consumption was 22.9MB. Max. memory is 16.0GB. [2023-08-24 07:06:55,041 INFO L158 Benchmark]: TraceAbstraction took 880161.03ms. Allocated memory was 356.5MB in the beginning and 557.8MB in the end (delta: 201.3MB). Free memory was 327.1MB in the beginning and 287.8MB in the end (delta: 39.3MB). Peak memory consumption was 240.4MB. Max. memory is 16.0GB. [2023-08-24 07:06:55,042 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 356.5MB. Free memory is still 333.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 669.22ms. Allocated memory is still 356.5MB. Free memory was 331.0MB in the beginning and 300.1MB in the end (delta: 30.9MB). Peak memory consumption was 31.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 59.85ms. Allocated memory is still 356.5MB. Free memory was 300.1MB in the beginning and 297.3MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.99ms. Allocated memory is still 356.5MB. Free memory was 297.3MB in the beginning and 294.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 569.89ms. Allocated memory is still 356.5MB. Free memory was 294.9MB in the beginning and 327.1MB in the end (delta: -32.2MB). Peak memory consumption was 22.9MB. Max. memory is 16.0GB. * TraceAbstraction took 880161.03ms. Allocated memory was 356.5MB in the beginning and 557.8MB in the end (delta: 201.3MB). Free memory was 327.1MB in the beginning and 287.8MB in the end (delta: 39.3MB). Peak memory consumption was 240.4MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 37.6s, 163 PlacesBefore, 25 PlacesAfterwards, 183 TransitionsBefore, 36 TransitionsAfterwards, 4176 CoEnabledTransitionPairs, 6 FixpointIterations, 62 TrivialSequentialCompositions, 85 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 17 ConcurrentYvCompositions, 9 ChoiceCompositions, 177 TotalNumberOfCompositions, 3913 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3332, independent: 3270, independent conditional: 0, independent unconditional: 3270, dependent: 62, dependent conditional: 0, dependent unconditional: 62, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2107, independent: 2089, independent conditional: 0, independent unconditional: 2089, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3332, independent: 1181, independent conditional: 0, independent unconditional: 1181, dependent: 44, dependent conditional: 0, dependent unconditional: 44, unknown: 2107, unknown conditional: 0, unknown unconditional: 2107] , Statistics on independence cache: Total cache size (in pairs): 48, Positive cache size: 42, Positive conditional cache size: 0, Positive unconditional cache size: 42, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 1061]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 104 with TraceHistMax 88,while AutomatonFreeRefinementEngine was Timeout during CAMEL. - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 236 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 880.0s, OverallIterations: 7, TraceHistogramMax: 88, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 37.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6 SdHoareTripleChecker+Valid, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 2.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 398 IncrementalHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 0 mSDtfsCounter, 398 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 191 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=470occurred in iteration=6, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 113 NumberOfCodeBlocks, 103 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 200 ConstructedInterpolants, 0 QuantifiedInterpolants, 328 SizeOfPredicates, 0 NumberOfNonLiveVariables, 11113 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 1937/2071 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown