/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_82-list_racefree_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 15:28:45,725 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 15:28:45,780 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 15:28:45,785 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 15:28:45,785 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 15:28:45,786 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 15:28:45,786 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 15:28:45,813 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 15:28:45,813 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 15:28:45,816 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 15:28:45,816 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 15:28:45,816 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 15:28:45,817 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 15:28:45,818 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 15:28:45,818 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 15:28:45,818 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 15:28:45,818 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 15:28:45,818 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 15:28:45,819 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 15:28:45,819 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 15:28:45,819 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 15:28:45,819 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 15:28:45,819 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 15:28:45,819 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 15:28:45,820 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 15:28:45,821 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 15:28:45,821 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 15:28:45,821 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 15:28:45,821 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 15:28:45,821 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 15:28:45,822 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 15:28:45,822 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 15:28:45,822 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 15:28:45,822 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 15:28:45,822 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 15:28:45,823 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 15:28:45,823 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 15:28:45,823 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 15:28:45,823 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 15:28:45,823 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 15:28:45,823 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 15:28:45,823 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 15:28:46,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 15:28:46,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 15:28:46,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 15:28:46,035 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 15:28:46,036 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 15:28:46,036 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_82-list_racefree_bound2.i [2023-08-03 15:28:46,959 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 15:28:47,173 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 15:28:47,173 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_82-list_racefree_bound2.i [2023-08-03 15:28:47,184 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9abbc1753/aaae3a27fbcc44bba51dd76e9d8f00af/FLAG4547ca3db [2023-08-03 15:28:47,555 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9abbc1753/aaae3a27fbcc44bba51dd76e9d8f00af [2023-08-03 15:28:47,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 15:28:47,560 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 15:28:47,560 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 15:28:47,560 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 15:28:47,564 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 15:28:47,565 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 03:28:47" (1/1) ... [2023-08-03 15:28:47,565 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78c5ccc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:47, skipping insertion in model container [2023-08-03 15:28:47,566 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 03:28:47" (1/1) ... [2023-08-03 15:28:47,611 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 15:28:47,946 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_82-list_racefree_bound2.i[47038,47051] [2023-08-03 15:28:47,972 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 15:28:47,986 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 15:28:47,999 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-03 15:28:48,000 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-03 15:28:48,010 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_82-list_racefree_bound2.i[47038,47051] [2023-08-03 15:28:48,017 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 15:28:48,055 INFO L206 MainTranslator]: Completed translation [2023-08-03 15:28:48,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:48 WrapperNode [2023-08-03 15:28:48,056 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 15:28:48,057 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 15:28:48,057 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 15:28:48,058 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 15:28:48,062 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:48" (1/1) ... [2023-08-03 15:28:48,073 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:48" (1/1) ... [2023-08-03 15:28:48,100 INFO L138 Inliner]: procedures = 278, calls = 61, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 208 [2023-08-03 15:28:48,101 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 15:28:48,101 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 15:28:48,101 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 15:28:48,102 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 15:28:48,110 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:48" (1/1) ... [2023-08-03 15:28:48,110 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:48" (1/1) ... [2023-08-03 15:28:48,121 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:48" (1/1) ... [2023-08-03 15:28:48,121 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:48" (1/1) ... [2023-08-03 15:28:48,127 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:48" (1/1) ... [2023-08-03 15:28:48,129 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:48" (1/1) ... [2023-08-03 15:28:48,131 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:48" (1/1) ... [2023-08-03 15:28:48,132 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:48" (1/1) ... [2023-08-03 15:28:48,146 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 15:28:48,147 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 15:28:48,147 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 15:28:48,147 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 15:28:48,147 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:48" (1/1) ... [2023-08-03 15:28:48,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 15:28:48,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:28:48,176 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) [2023-08-03 15:28:48,182 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 [2023-08-03 15:28:48,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 15:28:48,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-03 15:28:48,207 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-03 15:28:48,207 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-03 15:28:48,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 15:28:48,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 15:28:48,208 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-03 15:28:48,209 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-03 15:28:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 15:28:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 15:28:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 15:28:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 15:28:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-03 15:28:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 15:28:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 15:28:48,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 15:28:48,212 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 15:28:48,311 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 15:28:48,313 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 15:28:48,628 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 15:28:48,637 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 15:28:48,637 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-08-03 15:28:48,639 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 03:28:48 BoogieIcfgContainer [2023-08-03 15:28:48,639 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 15:28:48,641 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 15:28:48,641 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 15:28:48,644 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 15:28:48,644 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 03:28:47" (1/3) ... [2023-08-03 15:28:48,645 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@137a2285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 03:28:48, skipping insertion in model container [2023-08-03 15:28:48,645 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:48" (2/3) ... [2023-08-03 15:28:48,646 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@137a2285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 03:28:48, skipping insertion in model container [2023-08-03 15:28:48,646 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 03:28:48" (3/3) ... [2023-08-03 15:28:48,647 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_82-list_racefree_bound2.i [2023-08-03 15:28:48,653 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 15:28:48,659 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 15:28:48,660 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 15:28:48,660 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 15:28:48,741 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 15:28:48,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 210 transitions, 442 flow [2023-08-03 15:28:48,898 INFO L124 PetriNetUnfolderBase]: 52/402 cut-off events. [2023-08-03 15:28:48,898 INFO L125 PetriNetUnfolderBase]: For 8/15 co-relation queries the response was YES. [2023-08-03 15:28:48,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 402 events. 52/402 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1594 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 206. Up to 8 conditions per place. [2023-08-03 15:28:48,908 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 210 transitions, 442 flow [2023-08-03 15:28:48,916 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 208 transitions, 432 flow [2023-08-03 15:28:48,918 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 15:28:48,929 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 208 transitions, 432 flow [2023-08-03 15:28:48,931 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 208 transitions, 432 flow [2023-08-03 15:28:48,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 208 transitions, 432 flow [2023-08-03 15:28:48,975 INFO L124 PetriNetUnfolderBase]: 48/390 cut-off events. [2023-08-03 15:28:48,976 INFO L125 PetriNetUnfolderBase]: For 4/7 co-relation queries the response was YES. [2023-08-03 15:28:48,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 390 events. 48/390 cut-off events. For 4/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1511 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 194. Up to 8 conditions per place. [2023-08-03 15:28:48,986 INFO L119 LiptonReduction]: Number of co-enabled transitions 12936 [2023-08-03 15:28:54,390 INFO L134 LiptonReduction]: Checked pairs total: 23205 [2023-08-03 15:28:54,390 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-03 15:28:54,416 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 15:28:54,421 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@150a3e5f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 15:28:54,422 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 15:28:54,436 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 15:28:54,436 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-03 15:28:54,436 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 15:28:54,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:28:54,437 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 15:28:54,437 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 15:28:54,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:28:54,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1373220507, now seen corresponding path program 1 times [2023-08-03 15:28:54,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:28:54,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058082477] [2023-08-03 15:28:54,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:28:54,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:28:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 15:28:54,578 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 15:28:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 15:28:54,642 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 15:28:54,644 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 15:28:54,644 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 15:28:54,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 15:28:54,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 15:28:54,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-03 15:28:54,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 15:28:54,646 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 15:28:54,649 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 15:28:54,649 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 15:28:54,700 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 15:28:54,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 327 transitions, 702 flow [2023-08-03 15:28:54,873 INFO L124 PetriNetUnfolderBase]: 191/1195 cut-off events. [2023-08-03 15:28:54,873 INFO L125 PetriNetUnfolderBase]: For 72/107 co-relation queries the response was YES. [2023-08-03 15:28:54,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 1195 events. 191/1195 cut-off events. For 72/107 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7367 event pairs, 2 based on Foata normal form. 0/1005 useless extension candidates. Maximal degree in co-relation 755. Up to 32 conditions per place. [2023-08-03 15:28:54,883 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 327 transitions, 702 flow [2023-08-03 15:28:54,890 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 294 places, 327 transitions, 702 flow [2023-08-03 15:28:54,890 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 15:28:54,890 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 294 places, 327 transitions, 702 flow [2023-08-03 15:28:54,890 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 294 places, 327 transitions, 702 flow [2023-08-03 15:28:54,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 327 transitions, 702 flow [2023-08-03 15:28:55,007 INFO L124 PetriNetUnfolderBase]: 191/1195 cut-off events. [2023-08-03 15:28:55,008 INFO L125 PetriNetUnfolderBase]: For 72/107 co-relation queries the response was YES. [2023-08-03 15:28:55,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 1195 events. 191/1195 cut-off events. For 72/107 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7367 event pairs, 2 based on Foata normal form. 0/1005 useless extension candidates. Maximal degree in co-relation 755. Up to 32 conditions per place. [2023-08-03 15:28:55,060 INFO L119 LiptonReduction]: Number of co-enabled transitions 53524 [2023-08-03 15:29:00,669 INFO L134 LiptonReduction]: Checked pairs total: 118633 [2023-08-03 15:29:00,669 INFO L136 LiptonReduction]: Total number of compositions: 248 [2023-08-03 15:29:00,670 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 15:29:00,671 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@150a3e5f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 15:29:00,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-03 15:29:00,676 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 15:29:00,677 INFO L124 PetriNetUnfolderBase]: 9/80 cut-off events. [2023-08-03 15:29:00,677 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2023-08-03 15:29:00,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:29:00,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:29:00,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 15:29:00,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:29:00,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1284027515, now seen corresponding path program 1 times [2023-08-03 15:29:00,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:29:00,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130700090] [2023-08-03 15:29:00,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:29:00,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:29:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:29:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:29:00,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:29:00,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130700090] [2023-08-03 15:29:00,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130700090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:29:00,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:29:00,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 15:29:00,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272831673] [2023-08-03 15:29:00,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:29:00,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 15:29:00,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:29:00,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 15:29:00,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 15:29:00,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 575 [2023-08-03 15:29:00,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 114 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:29:00,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:29:00,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 575 [2023-08-03 15:29:00,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:30:10,830 INFO L124 PetriNetUnfolderBase]: 823691/1098759 cut-off events. [2023-08-03 15:30:10,830 INFO L125 PetriNetUnfolderBase]: For 46844/46844 co-relation queries the response was YES. [2023-08-03 15:30:12,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158676 conditions, 1098759 events. 823691/1098759 cut-off events. For 46844/46844 co-relation queries the response was YES. Maximal size of possible extension queue 22115. Compared 8430499 event pairs, 576024 based on Foata normal form. 74880/1019906 useless extension candidates. Maximal degree in co-relation 342012. Up to 1038244 conditions per place. [2023-08-03 15:30:15,979 INFO L140 encePairwiseOnDemand]: 550/575 looper letters, 82 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2023-08-03 15:30:15,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 101 transitions, 418 flow [2023-08-03 15:30:15,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 15:30:15,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 15:30:15,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 950 transitions. [2023-08-03 15:30:15,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2023-08-03 15:30:15,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 950 transitions. [2023-08-03 15:30:15,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 950 transitions. [2023-08-03 15:30:15,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:30:15,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 950 transitions. [2023-08-03 15:30:15,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:30:16,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:30:16,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:30:16,004 INFO L175 Difference]: Start difference. First operand has 89 places, 114 transitions, 276 flow. Second operand 3 states and 950 transitions. [2023-08-03 15:30:16,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 101 transitions, 418 flow [2023-08-03 15:30:16,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 101 transitions, 418 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 15:30:16,033 INFO L231 Difference]: Finished difference. Result has 92 places, 93 transitions, 244 flow [2023-08-03 15:30:16,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=92, PETRI_TRANSITIONS=93} [2023-08-03 15:30:16,037 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 3 predicate places. [2023-08-03 15:30:16,037 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 93 transitions, 244 flow [2023-08-03 15:30:16,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:30:16,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:30:16,037 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 15:30:16,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 15:30:16,038 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 15:30:16,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:30:16,038 INFO L85 PathProgramCache]: Analyzing trace with hash 503193650, now seen corresponding path program 1 times [2023-08-03 15:30:16,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:30:16,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341550235] [2023-08-03 15:30:16,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:30:16,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:30:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:30:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:30:16,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:30:16,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341550235] [2023-08-03 15:30:16,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341550235] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:30:16,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759817718] [2023-08-03 15:30:16,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:30:16,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:30:16,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:30:16,163 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) [2023-08-03 15:30:16,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 15:30:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:30:16,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 15:30:16,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:30:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:30:16,309 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 15:30:16,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759817718] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:30:16,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 15:30:16,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 15:30:16,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319108828] [2023-08-03 15:30:16,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:30:16,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 15:30:16,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:30:16,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 15:30:16,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 15:30:16,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 575 [2023-08-03 15:30:16,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 93 transitions, 244 flow. Second operand has 5 states, 5 states have (on average 281.6) internal successors, (1408), 5 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:30:16,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:30:16,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 575 [2023-08-03 15:30:16,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:31:25,856 INFO L124 PetriNetUnfolderBase]: 823594/1097902 cut-off events. [2023-08-03 15:31:25,856 INFO L125 PetriNetUnfolderBase]: For 46816/46816 co-relation queries the response was YES. [2023-08-03 15:31:28,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2157789 conditions, 1097902 events. 823594/1097902 cut-off events. For 46816/46816 co-relation queries the response was YES. Maximal size of possible extension queue 22118. Compared 8421473 event pairs, 431288 based on Foata normal form. 56/944557 useless extension candidates. Maximal degree in co-relation 388915. Up to 1037955 conditions per place. [2023-08-03 15:31:31,524 INFO L140 encePairwiseOnDemand]: 571/575 looper letters, 94 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2023-08-03 15:31:31,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 114 transitions, 480 flow [2023-08-03 15:31:31,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 15:31:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 15:31:31,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1499 transitions. [2023-08-03 15:31:31,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213913043478261 [2023-08-03 15:31:31,528 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1499 transitions. [2023-08-03 15:31:31,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1499 transitions. [2023-08-03 15:31:31,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:31:31,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1499 transitions. [2023-08-03 15:31:31,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 299.8) internal successors, (1499), 5 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:31:31,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 575.0) internal successors, (3450), 6 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:31:31,535 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 575.0) internal successors, (3450), 6 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:31:31,536 INFO L175 Difference]: Start difference. First operand has 92 places, 93 transitions, 244 flow. Second operand 5 states and 1499 transitions. [2023-08-03 15:31:31,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 114 transitions, 480 flow [2023-08-03 15:31:31,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 114 transitions, 472 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 15:31:31,565 INFO L231 Difference]: Finished difference. Result has 94 places, 93 transitions, 251 flow [2023-08-03 15:31:31,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=251, PETRI_PLACES=94, PETRI_TRANSITIONS=93} [2023-08-03 15:31:31,566 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 5 predicate places. [2023-08-03 15:31:31,566 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 93 transitions, 251 flow [2023-08-03 15:31:31,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 281.6) internal successors, (1408), 5 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:31:31,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:31:31,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:31:31,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 15:31:31,772 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 [2023-08-03 15:31:31,773 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 15:31:31,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:31:31,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1734668145, now seen corresponding path program 1 times [2023-08-03 15:31:31,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:31:31,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609245113] [2023-08-03 15:31:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:31:31,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:31:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:31:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:31:31,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:31:31,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609245113] [2023-08-03 15:31:31,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609245113] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:31:31,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155741519] [2023-08-03 15:31:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:31:31,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:31:31,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:31:31,875 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) [2023-08-03 15:31:31,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 15:31:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:31:32,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 15:31:32,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:31:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:31:32,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:31:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:31:32,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155741519] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:31:32,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:31:32,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 15:31:32,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543274561] [2023-08-03 15:31:32,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:31:32,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 15:31:32,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:31:32,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 15:31:32,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 15:31:32,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 575 [2023-08-03 15:31:32,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 93 transitions, 251 flow. Second operand has 5 states, 5 states have (on average 283.4) internal successors, (1417), 5 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:31:32,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:31:32,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 575 [2023-08-03 15:31:32,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:32:38,475 INFO L124 PetriNetUnfolderBase]: 799584/1062660 cut-off events. [2023-08-03 15:32:38,475 INFO L125 PetriNetUnfolderBase]: For 33990/33990 co-relation queries the response was YES. [2023-08-03 15:32:41,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2084348 conditions, 1062660 events. 799584/1062660 cut-off events. For 33990/33990 co-relation queries the response was YES. Maximal size of possible extension queue 21211. Compared 8043354 event pairs, 390424 based on Foata normal form. 8/914411 useless extension candidates. Maximal degree in co-relation 243331. Up to 1006562 conditions per place. [2023-08-03 15:32:43,970 INFO L140 encePairwiseOnDemand]: 572/575 looper letters, 94 selfloop transitions, 3 changer transitions 0/113 dead transitions. [2023-08-03 15:32:43,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 113 transitions, 481 flow [2023-08-03 15:32:43,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 15:32:43,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 15:32:43,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1218 transitions. [2023-08-03 15:32:43,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295652173913044 [2023-08-03 15:32:43,997 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1218 transitions. [2023-08-03 15:32:43,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1218 transitions. [2023-08-03 15:32:43,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:32:43,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1218 transitions. [2023-08-03 15:32:44,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 304.5) internal successors, (1218), 4 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:32:44,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 575.0) internal successors, (2875), 5 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:32:44,003 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 575.0) internal successors, (2875), 5 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:32:44,003 INFO L175 Difference]: Start difference. First operand has 94 places, 93 transitions, 251 flow. Second operand 4 states and 1218 transitions. [2023-08-03 15:32:44,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 113 transitions, 481 flow [2023-08-03 15:32:44,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 113 transitions, 476 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 15:32:44,009 INFO L231 Difference]: Finished difference. Result has 95 places, 92 transitions, 244 flow [2023-08-03 15:32:44,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=244, PETRI_PLACES=95, PETRI_TRANSITIONS=92} [2023-08-03 15:32:44,009 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 6 predicate places. [2023-08-03 15:32:44,009 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 92 transitions, 244 flow [2023-08-03 15:32:44,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 283.4) internal successors, (1417), 5 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:32:44,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:32:44,010 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:32:44,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 15:32:44,214 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 [2023-08-03 15:32:44,214 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 15:32:44,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:32:44,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1898127672, now seen corresponding path program 1 times [2023-08-03 15:32:44,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:32:44,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930710906] [2023-08-03 15:32:44,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:32:44,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:32:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:32:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:32:44,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:32:44,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930710906] [2023-08-03 15:32:44,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930710906] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:32:44,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382305562] [2023-08-03 15:32:44,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:32:44,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:32:44,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:32:44,641 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) [2023-08-03 15:32:44,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 15:32:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:32:44,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-03 15:32:44,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:32:44,798 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-08-03 15:32:44,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 15:32:44,826 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 15:32:44,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 15:32:44,852 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 15:32:44,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 15:32:44,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 15:32:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:32:44,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:32:44,953 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_296 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2_ids~0#1.base| v_ArrVal_296) c_~A~0.base) c_~A~0.offset) 0)) is different from false [2023-08-03 15:32:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:32:49,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382305562] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:32:49,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:32:49,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-08-03 15:32:49,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716500289] [2023-08-03 15:32:49,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:32:49,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-03 15:32:49,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:32:49,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-03 15:32:49,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=177, Unknown=11, NotChecked=28, Total=272 [2023-08-03 15:32:49,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 575 [2023-08-03 15:32:49,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 92 transitions, 244 flow. Second operand has 17 states, 17 states have (on average 221.41176470588235) internal successors, (3764), 17 states have internal predecessors, (3764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:32:49,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:32:49,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 575 [2023-08-03 15:32:49,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand