./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_safe-7.i --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 273a578a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread/fib_safe-7.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a12d5b905fa07b94a851888f481630fccc5d15913fb6b7efa54c908526d1783 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-273a578-m [2024-02-19 14:01:33,987 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-19 14:01:34,083 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-19 14:01:34,089 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-19 14:01:34,092 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-19 14:01:34,124 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-19 14:01:34,129 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-19 14:01:34,129 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-19 14:01:34,130 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-19 14:01:34,131 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-19 14:01:34,131 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-19 14:01:34,132 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-19 14:01:34,132 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-19 14:01:34,136 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-19 14:01:34,136 INFO L153 SettingsManager]: * Use SBE=true [2024-02-19 14:01:34,136 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-19 14:01:34,137 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-19 14:01:34,138 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-19 14:01:34,138 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-19 14:01:34,138 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-19 14:01:34,138 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-19 14:01:34,139 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-19 14:01:34,139 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-19 14:01:34,139 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-19 14:01:34,139 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-19 14:01:34,140 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-19 14:01:34,140 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-19 14:01:34,140 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-19 14:01:34,141 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-19 14:01:34,141 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-19 14:01:34,142 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-19 14:01:34,142 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-19 14:01:34,143 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:01:34,143 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-19 14:01:34,143 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-19 14:01:34,143 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-19 14:01:34,144 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-19 14:01:34,144 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-19 14:01:34,144 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-19 14:01:34,145 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-19 14:01:34,145 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-19 14:01:34,145 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-19 14:01:34,145 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-19 14:01:34,145 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a12d5b905fa07b94a851888f481630fccc5d15913fb6b7efa54c908526d1783 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-19 14:01:34,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-19 14:01:34,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-19 14:01:34,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-19 14:01:34,521 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-19 14:01:34,521 INFO L274 PluginConnector]: CDTParser initialized [2024-02-19 14:01:34,523 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-7.i [2024-02-19 14:01:35,839 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-19 14:01:36,080 INFO L384 CDTParser]: Found 1 translation units. [2024-02-19 14:01:36,081 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-7.i [2024-02-19 14:01:36,095 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8206759e/1691d656c073490d8ebb182ad0792eee/FLAGb510a3bc5 [2024-02-19 14:01:36,107 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8206759e/1691d656c073490d8ebb182ad0792eee [2024-02-19 14:01:36,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-19 14:01:36,110 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-19 14:01:36,111 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-19 14:01:36,111 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-19 14:01:36,117 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-19 14:01:36,119 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:01:36" (1/1) ... [2024-02-19 14:01:36,120 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30bad238 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:36, skipping insertion in model container [2024-02-19 14:01:36,120 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:01:36" (1/1) ... [2024-02-19 14:01:36,167 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-19 14:01:36,501 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-7.i[30241,30254] [2024-02-19 14:01:36,526 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:01:36,539 INFO L202 MainTranslator]: Completed pre-run [2024-02-19 14:01:36,580 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-7.i[30241,30254] [2024-02-19 14:01:36,586 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:01:36,634 INFO L206 MainTranslator]: Completed translation [2024-02-19 14:01:36,635 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:36 WrapperNode [2024-02-19 14:01:36,635 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-19 14:01:36,636 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-19 14:01:36,637 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-19 14:01:36,637 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-19 14:01:36,643 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:36" (1/1) ... [2024-02-19 14:01:36,675 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:36" (1/1) ... [2024-02-19 14:01:36,707 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2024-02-19 14:01:36,708 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-19 14:01:36,708 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-19 14:01:36,708 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-19 14:01:36,709 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-19 14:01:36,718 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:36" (1/1) ... [2024-02-19 14:01:36,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:36" (1/1) ... [2024-02-19 14:01:36,724 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:36" (1/1) ... [2024-02-19 14:01:36,750 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-02-19 14:01:36,751 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:36" (1/1) ... [2024-02-19 14:01:36,751 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:36" (1/1) ... [2024-02-19 14:01:36,763 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:36" (1/1) ... [2024-02-19 14:01:36,766 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:36" (1/1) ... [2024-02-19 14:01:36,774 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:36" (1/1) ... [2024-02-19 14:01:36,775 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:36" (1/1) ... [2024-02-19 14:01:36,779 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-19 14:01:36,781 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-19 14:01:36,782 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-19 14:01:36,782 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-19 14:01:36,783 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:36" (1/1) ... [2024-02-19 14:01:36,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:01:36,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:01:36,813 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-19 14:01:36,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-19 14:01:36,876 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-19 14:01:36,877 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-19 14:01:36,877 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-19 14:01:36,877 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-19 14:01:36,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-19 14:01:36,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-19 14:01:36,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-19 14:01:36,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-19 14:01:36,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-19 14:01:36,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-19 14:01:36,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-19 14:01:36,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-19 14:01:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-19 14:01:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-19 14:01:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-19 14:01:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-19 14:01:36,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-19 14:01:36,882 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-19 14:01:37,036 INFO L244 CfgBuilder]: Building ICFG [2024-02-19 14:01:37,038 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-19 14:01:37,244 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-19 14:01:37,244 INFO L293 CfgBuilder]: Performing block encoding [2024-02-19 14:01:37,373 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-19 14:01:37,374 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-19 14:01:37,375 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:01:37 BoogieIcfgContainer [2024-02-19 14:01:37,375 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-19 14:01:37,377 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-19 14:01:37,377 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-19 14:01:37,381 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-19 14:01:37,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 02:01:36" (1/3) ... [2024-02-19 14:01:37,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3656edde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:01:37, skipping insertion in model container [2024-02-19 14:01:37,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:36" (2/3) ... [2024-02-19 14:01:37,385 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3656edde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:01:37, skipping insertion in model container [2024-02-19 14:01:37,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:01:37" (3/3) ... [2024-02-19 14:01:37,386 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-7.i [2024-02-19 14:01:37,406 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-19 14:01:37,406 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-19 14:01:37,406 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-19 14:01:37,446 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-19 14:01:37,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2024-02-19 14:01:37,524 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-02-19 14:01:37,524 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-19 14:01:37,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-02-19 14:01:37,529 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2024-02-19 14:01:37,532 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2024-02-19 14:01:37,547 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:01:37,556 INFO L369 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=All, 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;@32ceb733, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:01:37,556 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-19 14:01:37,569 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:01:37,569 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-02-19 14:01:37,569 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-19 14:01:37,569 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:01:37,570 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:01:37,571 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:01:37,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:01:37,576 INFO L85 PathProgramCache]: Analyzing trace with hash -369539475, now seen corresponding path program 1 times [2024-02-19 14:01:37,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:01:37,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740067903] [2024-02-19 14:01:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:01:37,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:01:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:01:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:37,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:01:37,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740067903] [2024-02-19 14:01:37,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740067903] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:01:37,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:01:37,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-19 14:01:37,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550379731] [2024-02-19 14:01:37,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:01:37,920 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:01:37,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:01:37,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:01:37,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:01:37,956 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-02-19 14:01:37,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:37,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:01:37,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-02-19 14:01:37,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:01:38,097 INFO L124 PetriNetUnfolderBase]: 115/223 cut-off events. [2024-02-19 14:01:38,097 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-19 14:01:38,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 223 events. 115/223 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 689 event pairs, 20 based on Foata normal form. 9/209 useless extension candidates. Maximal degree in co-relation 398. Up to 118 conditions per place. [2024-02-19 14:01:38,104 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 20 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2024-02-19 14:01:38,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 118 flow [2024-02-19 14:01:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 14:01:38,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 14:01:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-02-19 14:01:38,114 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-02-19 14:01:38,117 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2024-02-19 14:01:38,118 INFO L507 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 118 flow [2024-02-19 14:01:38,118 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:38,118 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:01:38,118 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:01:38,118 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-19 14:01:38,119 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:01:38,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:01:38,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1403763973, now seen corresponding path program 1 times [2024-02-19 14:01:38,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:01:38,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294756263] [2024-02-19 14:01:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:01:38,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:01:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:01:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:38,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:01:38,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294756263] [2024-02-19 14:01:38,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294756263] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:01:38,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134152979] [2024-02-19 14:01:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:01:38,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:01:38,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:01:38,240 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:01:38,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-19 14:01:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:01:38,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-19 14:01:38,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:01:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:38,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:01:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:38,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134152979] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:01:38,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:01:38,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-02-19 14:01:38,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123396491] [2024-02-19 14:01:38,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:01:38,396 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-19 14:01:38,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:01:38,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-19 14:01:38,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-02-19 14:01:38,398 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-02-19 14:01:38,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:38,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:01:38,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-02-19 14:01:38,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:01:38,497 INFO L124 PetriNetUnfolderBase]: 169/306 cut-off events. [2024-02-19 14:01:38,498 INFO L125 PetriNetUnfolderBase]: For 35/65 co-relation queries the response was YES. [2024-02-19 14:01:38,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 835 conditions, 306 events. 169/306 cut-off events. For 35/65 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 909 event pairs, 20 based on Foata normal form. 6/288 useless extension candidates. Maximal degree in co-relation 817. Up to 199 conditions per place. [2024-02-19 14:01:38,501 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 38 selfloop transitions, 5 changer transitions 1/54 dead transitions. [2024-02-19 14:01:38,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 54 transitions, 290 flow [2024-02-19 14:01:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-19 14:01:38,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-19 14:01:38,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-02-19 14:01:38,503 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6839080459770115 [2024-02-19 14:01:38,504 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-02-19 14:01:38,504 INFO L507 AbstractCegarLoop]: Abstraction has has 37 places, 54 transitions, 290 flow [2024-02-19 14:01:38,504 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:38,504 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:01:38,505 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:01:38,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-19 14:01:38,728 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:01:38,728 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:01:38,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:01:38,729 INFO L85 PathProgramCache]: Analyzing trace with hash -30528403, now seen corresponding path program 2 times [2024-02-19 14:01:38,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:01:38,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786940305] [2024-02-19 14:01:38,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:01:38,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:01:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:01:38,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:38,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:01:38,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786940305] [2024-02-19 14:01:38,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786940305] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:01:38,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639844870] [2024-02-19 14:01:38,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:01:38,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:01:38,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:01:38,900 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:01:38,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-19 14:01:38,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:01:38,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:01:38,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 14:01:39,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:01:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:39,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:01:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:39,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639844870] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:01:39,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:01:39,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-19 14:01:39,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230884852] [2024-02-19 14:01:39,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:01:39,091 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 14:01:39,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:01:39,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 14:01:39,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-19 14:01:39,093 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-02-19 14:01:39,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 54 transitions, 290 flow. Second operand has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:39,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:01:39,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-02-19 14:01:39,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:01:39,310 INFO L124 PetriNetUnfolderBase]: 277/472 cut-off events. [2024-02-19 14:01:39,310 INFO L125 PetriNetUnfolderBase]: For 103/139 co-relation queries the response was YES. [2024-02-19 14:01:39,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1746 conditions, 472 events. 277/472 cut-off events. For 103/139 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1344 event pairs, 20 based on Foata normal form. 18/470 useless extension candidates. Maximal degree in co-relation 1724. Up to 361 conditions per place. [2024-02-19 14:01:39,320 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 74 selfloop transitions, 11 changer transitions 1/96 dead transitions. [2024-02-19 14:01:39,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 96 transitions, 714 flow [2024-02-19 14:01:39,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-19 14:01:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-19 14:01:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2024-02-19 14:01:39,327 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6781609195402298 [2024-02-19 14:01:39,328 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 18 predicate places. [2024-02-19 14:01:39,328 INFO L507 AbstractCegarLoop]: Abstraction has has 48 places, 96 transitions, 714 flow [2024-02-19 14:01:39,329 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:39,329 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:01:39,329 INFO L234 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:01:39,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-19 14:01:39,536 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-02-19 14:01:39,536 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:01:39,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:01:39,537 INFO L85 PathProgramCache]: Analyzing trace with hash -246684307, now seen corresponding path program 3 times [2024-02-19 14:01:39,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:01:39,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136560991] [2024-02-19 14:01:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:01:39,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:01:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:01:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:39,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:01:39,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136560991] [2024-02-19 14:01:39,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136560991] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:01:39,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116064689] [2024-02-19 14:01:39,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:01:39,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:01:39,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:01:39,757 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:01:39,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-19 14:01:39,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-02-19 14:01:39,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:01:39,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-19 14:01:39,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:01:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:39,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:01:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:40,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116064689] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:01:40,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:01:40,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2024-02-19 14:01:40,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516138176] [2024-02-19 14:01:40,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:01:40,093 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-19 14:01:40,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:01:40,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-19 14:01:40,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2024-02-19 14:01:40,096 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-02-19 14:01:40,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 96 transitions, 714 flow. Second operand has 19 states, 19 states have (on average 13.421052631578947) internal successors, (255), 19 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:40,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:01:40,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-02-19 14:01:40,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:01:40,362 INFO L124 PetriNetUnfolderBase]: 385/636 cut-off events. [2024-02-19 14:01:40,362 INFO L125 PetriNetUnfolderBase]: For 218/278 co-relation queries the response was YES. [2024-02-19 14:01:40,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2979 conditions, 636 events. 385/636 cut-off events. For 218/278 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1767 event pairs, 20 based on Foata normal form. 18/633 useless extension candidates. Maximal degree in co-relation 2953. Up to 523 conditions per place. [2024-02-19 14:01:40,368 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 110 selfloop transitions, 17 changer transitions 1/138 dead transitions. [2024-02-19 14:01:40,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 138 transitions, 1306 flow [2024-02-19 14:01:40,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-02-19 14:01:40,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-02-19 14:01:40,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 350 transitions. [2024-02-19 14:01:40,371 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6704980842911877 [2024-02-19 14:01:40,373 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-02-19 14:01:40,373 INFO L507 AbstractCegarLoop]: Abstraction has has 65 places, 138 transitions, 1306 flow [2024-02-19 14:01:40,373 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.421052631578947) internal successors, (255), 19 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:40,374 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:01:40,374 INFO L234 CegarLoopForPetriNet]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:01:40,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-19 14:01:40,594 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:01:40,595 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:01:40,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:01:40,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1149575571, now seen corresponding path program 4 times [2024-02-19 14:01:40,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:01:40,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690404527] [2024-02-19 14:01:40,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:01:40,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:01:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:01:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:41,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:01:41,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690404527] [2024-02-19 14:01:41,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690404527] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:01:41,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426558683] [2024-02-19 14:01:41,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:01:41,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:01:41,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:01:41,993 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:01:42,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-19 14:01:42,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:01:42,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:01:42,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 59 conjunts are in the unsatisfiable core [2024-02-19 14:01:42,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:01:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:43,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:01:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:44,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426558683] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:01:44,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:01:44,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 66 [2024-02-19 14:01:44,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193502559] [2024-02-19 14:01:44,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:01:44,212 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-02-19 14:01:44,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:01:44,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-02-19 14:01:44,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=3788, Unknown=0, NotChecked=0, Total=4422 [2024-02-19 14:01:44,295 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-19 14:01:44,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 138 transitions, 1306 flow. Second operand has 67 states, 67 states have (on average 6.253731343283582) internal successors, (419), 67 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:44,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:01:44,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-19 14:01:44,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:02:07,882 INFO L124 PetriNetUnfolderBase]: 20317/32794 cut-off events. [2024-02-19 14:02:07,883 INFO L125 PetriNetUnfolderBase]: For 61854/61854 co-relation queries the response was YES. [2024-02-19 14:02:07,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153992 conditions, 32794 events. 20317/32794 cut-off events. For 61854/61854 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 213045 event pairs, 68 based on Foata normal form. 0/32031 useless extension candidates. Maximal degree in co-relation 153960. Up to 21418 conditions per place. [2024-02-19 14:02:08,349 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 3092 selfloop transitions, 731 changer transitions 860/4686 dead transitions. [2024-02-19 14:02:08,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 4686 transitions, 51944 flow [2024-02-19 14:02:08,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2024-02-19 14:02:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2024-02-19 14:02:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 2728 transitions. [2024-02-19 14:02:08,362 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.47270836943337374 [2024-02-19 14:02:08,364 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 233 predicate places. [2024-02-19 14:02:08,365 INFO L507 AbstractCegarLoop]: Abstraction has has 263 places, 4686 transitions, 51944 flow [2024-02-19 14:02:08,365 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 6.253731343283582) internal successors, (419), 67 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:02:08,365 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:02:08,366 INFO L234 CegarLoopForPetriNet]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:02:08,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-19 14:02:08,580 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:02:08,580 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:02:08,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:02:08,581 INFO L85 PathProgramCache]: Analyzing trace with hash 480425093, now seen corresponding path program 1 times [2024-02-19 14:02:08,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:02:08,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956797942] [2024-02-19 14:02:08,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:02:08,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:02:08,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:02:09,699 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:02:09,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:02:09,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956797942] [2024-02-19 14:02:09,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956797942] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:02:09,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101772668] [2024-02-19 14:02:09,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:02:09,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:02:09,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:02:09,702 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:02:09,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-19 14:02:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:02:09,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 61 conjunts are in the unsatisfiable core [2024-02-19 14:02:09,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:02:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 105 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:02:10,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:02:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:02:12,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101772668] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:02:12,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:02:12,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 73 [2024-02-19 14:02:12,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878461845] [2024-02-19 14:02:12,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:02:12,162 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-02-19 14:02:12,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:02:12,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-02-19 14:02:12,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=4724, Unknown=0, NotChecked=0, Total=5402 [2024-02-19 14:02:12,245 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-19 14:02:12,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 4686 transitions, 51944 flow. Second operand has 74 states, 74 states have (on average 6.297297297297297) internal successors, (466), 74 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:02:12,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:02:12,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-19 14:02:12,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand