./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c --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/weaver/popl20-prod-cons.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --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 15:15:59,610 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-19 15:15:59,683 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-19 15:15:59,690 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-19 15:15:59,690 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-19 15:15:59,739 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-19 15:15:59,740 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-19 15:15:59,740 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-19 15:15:59,741 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-19 15:15:59,744 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-19 15:15:59,745 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-19 15:15:59,745 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-19 15:15:59,746 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-19 15:15:59,747 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-19 15:15:59,747 INFO L153 SettingsManager]: * Use SBE=true [2024-02-19 15:15:59,747 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-19 15:15:59,747 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-19 15:15:59,748 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-19 15:15:59,748 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-19 15:15:59,748 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-19 15:15:59,748 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-19 15:15:59,749 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-19 15:15:59,750 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-19 15:15:59,750 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-19 15:15:59,750 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-19 15:15:59,750 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-19 15:15:59,751 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-19 15:15:59,751 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-19 15:15:59,751 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-19 15:15:59,752 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-19 15:15:59,753 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-19 15:15:59,753 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-19 15:15:59,753 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 15:15:59,753 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-19 15:15:59,753 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-19 15:15:59,754 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-19 15:15:59,754 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-19 15:15:59,755 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-19 15:15:59,755 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-19 15:15:59,755 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-19 15:15:59,755 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-19 15:15:59,756 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-19 15:15:59,756 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-19 15:15:59,756 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-19 15:16:00,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-19 15:16:00,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-19 15:16:00,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-19 15:16:00,095 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-19 15:16:00,096 INFO L274 PluginConnector]: CDTParser initialized [2024-02-19 15:16:00,099 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2024-02-19 15:16:01,393 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-19 15:16:01,595 INFO L384 CDTParser]: Found 1 translation units. [2024-02-19 15:16:01,596 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2024-02-19 15:16:01,612 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91a65e0a1/f79f2830f54d402a957fbeb666c8e70c/FLAG72f0c19ed [2024-02-19 15:16:01,628 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91a65e0a1/f79f2830f54d402a957fbeb666c8e70c [2024-02-19 15:16:01,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-19 15:16:01,631 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-19 15:16:01,635 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-19 15:16:01,635 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-19 15:16:01,639 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-19 15:16:01,640 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 03:16:01" (1/1) ... [2024-02-19 15:16:01,641 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49edc7ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:01, skipping insertion in model container [2024-02-19 15:16:01,641 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 03:16:01" (1/1) ... [2024-02-19 15:16:01,667 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-19 15:16:01,889 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2024-02-19 15:16:01,903 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 15:16:01,916 INFO L202 MainTranslator]: Completed pre-run [2024-02-19 15:16:01,951 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2024-02-19 15:16:01,954 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 15:16:01,969 INFO L206 MainTranslator]: Completed translation [2024-02-19 15:16:01,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:01 WrapperNode [2024-02-19 15:16:01,970 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-19 15:16:01,971 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-19 15:16:01,971 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-19 15:16:01,971 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-19 15:16:01,977 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:01" (1/1) ... [2024-02-19 15:16:01,993 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:01" (1/1) ... [2024-02-19 15:16:02,028 INFO L138 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 171 [2024-02-19 15:16:02,028 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-19 15:16:02,029 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-19 15:16:02,030 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-19 15:16:02,030 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-19 15:16:02,039 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:01" (1/1) ... [2024-02-19 15:16:02,040 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:01" (1/1) ... [2024-02-19 15:16:02,054 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:01" (1/1) ... [2024-02-19 15:16:02,079 INFO L175 MemorySlicer]: Split 11 memory accesses to 5 slices as follows [2, 2, 2, 3, 2]. 27 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-02-19 15:16:02,081 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:01" (1/1) ... [2024-02-19 15:16:02,081 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:01" (1/1) ... [2024-02-19 15:16:02,090 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:01" (1/1) ... [2024-02-19 15:16:02,098 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:01" (1/1) ... [2024-02-19 15:16:02,103 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:01" (1/1) ... [2024-02-19 15:16:02,104 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:01" (1/1) ... [2024-02-19 15:16:02,108 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-19 15:16:02,111 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-19 15:16:02,111 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-19 15:16:02,112 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-19 15:16:02,113 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:01" (1/1) ... [2024-02-19 15:16:02,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 15:16:02,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:02,189 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 15:16:02,192 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 15:16:02,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-19 15:16:02,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-19 15:16:02,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-19 15:16:02,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-19 15:16:02,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-19 15:16:02,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-19 15:16:02,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-19 15:16:02,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-19 15:16:02,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-19 15:16:02,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-19 15:16:02,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-19 15:16:02,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-19 15:16:02,229 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-19 15:16:02,229 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-19 15:16:02,229 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-19 15:16:02,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-19 15:16:02,230 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-19 15:16:02,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-19 15:16:02,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-19 15:16:02,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-19 15:16:02,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-19 15:16:02,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-19 15:16:02,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-19 15:16:02,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-19 15:16:02,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-19 15:16:02,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-19 15:16:02,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-19 15:16:02,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-19 15:16:02,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-19 15:16:02,235 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 15:16:02,336 INFO L244 CfgBuilder]: Building ICFG [2024-02-19 15:16:02,338 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-19 15:16:02,658 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-19 15:16:02,658 INFO L293 CfgBuilder]: Performing block encoding [2024-02-19 15:16:02,910 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-19 15:16:02,910 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-19 15:16:02,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 03:16:02 BoogieIcfgContainer [2024-02-19 15:16:02,911 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-19 15:16:02,914 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-19 15:16:02,914 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-19 15:16:02,917 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-19 15:16:02,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 03:16:01" (1/3) ... [2024-02-19 15:16:02,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2d799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 03:16:02, skipping insertion in model container [2024-02-19 15:16:02,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:01" (2/3) ... [2024-02-19 15:16:02,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2d799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 03:16:02, skipping insertion in model container [2024-02-19 15:16:02,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 03:16:02" (3/3) ... [2024-02-19 15:16:02,921 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2024-02-19 15:16:02,938 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-19 15:16:02,938 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-19 15:16:02,938 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-19 15:16:02,978 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-19 15:16:03,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 38 transitions, 97 flow [2024-02-19 15:16:03,035 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2024-02-19 15:16:03,036 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-19 15:16:03,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 35 events. 4/35 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 59 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-02-19 15:16:03,039 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 38 transitions, 97 flow [2024-02-19 15:16:03,042 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 34 transitions, 86 flow [2024-02-19 15:16:03,050 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 15:16:03,056 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;@419264a9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 15:16:03,056 INFO L370 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-02-19 15:16:03,068 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 15:16:03,068 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-02-19 15:16:03,068 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-19 15:16:03,068 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:03,069 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:03,070 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:03,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:03,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1181666893, now seen corresponding path program 1 times [2024-02-19 15:16:03,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:03,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521360296] [2024-02-19 15:16:03,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:03,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:03,685 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 15:16:03,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:03,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521360296] [2024-02-19 15:16:03,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521360296] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:16:03,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:16:03,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-19 15:16:03,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581687681] [2024-02-19 15:16:03,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:16:03,696 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-19 15:16:03,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:03,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-19 15:16:03,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-02-19 15:16:03,787 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-02-19 15:16:03,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 86 flow. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 15:16:03,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:03,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-02-19 15:16:03,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:04,192 INFO L124 PetriNetUnfolderBase]: 842/1358 cut-off events. [2024-02-19 15:16:04,192 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2024-02-19 15:16:04,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 1358 events. 842/1358 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6616 event pairs, 63 based on Foata normal form. 92/1431 useless extension candidates. Maximal degree in co-relation 2340. Up to 457 conditions per place. [2024-02-19 15:16:04,205 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 56 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2024-02-19 15:16:04,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 69 transitions, 293 flow [2024-02-19 15:16:04,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-19 15:16:04,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-19 15:16:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-02-19 15:16:04,223 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5657894736842105 [2024-02-19 15:16:04,227 INFO L308 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2024-02-19 15:16:04,228 INFO L507 AbstractCegarLoop]: Abstraction has has 45 places, 69 transitions, 293 flow [2024-02-19 15:16:04,228 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 15:16:04,228 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:04,229 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:04,229 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-19 15:16:04,229 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:04,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:04,231 INFO L85 PathProgramCache]: Analyzing trace with hash -998025946, now seen corresponding path program 1 times [2024-02-19 15:16:04,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:04,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789548059] [2024-02-19 15:16:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:04,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:04,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:04,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789548059] [2024-02-19 15:16:04,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789548059] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:16:04,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:16:04,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 15:16:04,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504172368] [2024-02-19 15:16:04,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:16:04,357 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 15:16:04,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:04,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 15:16:04,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 15:16:04,359 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-02-19 15:16:04,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 69 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 15:16:04,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:04,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-02-19 15:16:04,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:04,537 INFO L124 PetriNetUnfolderBase]: 741/1274 cut-off events. [2024-02-19 15:16:04,537 INFO L125 PetriNetUnfolderBase]: For 614/626 co-relation queries the response was YES. [2024-02-19 15:16:04,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3333 conditions, 1274 events. 741/1274 cut-off events. For 614/626 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5706 event pairs, 50 based on Foata normal form. 30/1288 useless extension candidates. Maximal degree in co-relation 2894. Up to 719 conditions per place. [2024-02-19 15:16:04,564 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 56 selfloop transitions, 3 changer transitions 13/89 dead transitions. [2024-02-19 15:16:04,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 89 transitions, 532 flow [2024-02-19 15:16:04,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 15:16:04,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 15:16:04,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-02-19 15:16:04,566 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6929824561403509 [2024-02-19 15:16:04,567 INFO L308 CegarLoopForPetriNet]: 40 programPoint places, 7 predicate places. [2024-02-19 15:16:04,567 INFO L507 AbstractCegarLoop]: Abstraction has has 47 places, 89 transitions, 532 flow [2024-02-19 15:16:04,567 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 15:16:04,568 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:04,568 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:04,568 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-19 15:16:04,568 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:04,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:04,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1360346850, now seen corresponding path program 1 times [2024-02-19 15:16:04,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:04,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181912084] [2024-02-19 15:16:04,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:04,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:16:04,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:04,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181912084] [2024-02-19 15:16:04,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181912084] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:16:04,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:16:04,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-19 15:16:04,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181824790] [2024-02-19 15:16:04,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:16:04,670 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 15:16:04,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:04,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 15:16:04,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-19 15:16:04,672 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-02-19 15:16:04,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 89 transitions, 532 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 15:16:04,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:04,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-02-19 15:16:04,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:04,848 INFO L124 PetriNetUnfolderBase]: 823/1460 cut-off events. [2024-02-19 15:16:04,849 INFO L125 PetriNetUnfolderBase]: For 1734/1826 co-relation queries the response was YES. [2024-02-19 15:16:04,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4723 conditions, 1460 events. 823/1460 cut-off events. For 1734/1826 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6924 event pairs, 78 based on Foata normal form. 14/1456 useless extension candidates. Maximal degree in co-relation 3616. Up to 823 conditions per place. [2024-02-19 15:16:04,868 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 58 selfloop transitions, 2 changer transitions 33/110 dead transitions. [2024-02-19 15:16:04,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 110 transitions, 862 flow [2024-02-19 15:16:04,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 15:16:04,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 15:16:04,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-02-19 15:16:04,870 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2024-02-19 15:16:04,870 INFO L308 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2024-02-19 15:16:04,871 INFO L507 AbstractCegarLoop]: Abstraction has has 50 places, 110 transitions, 862 flow [2024-02-19 15:16:04,871 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 15:16:04,871 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:04,871 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:04,871 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-19 15:16:04,872 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:04,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:04,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1761223112, now seen corresponding path program 1 times [2024-02-19 15:16:04,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:04,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611827533] [2024-02-19 15:16:04,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:04,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 15:16:04,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:04,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611827533] [2024-02-19 15:16:04,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611827533] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:16:04,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251757901] [2024-02-19 15:16:04,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:04,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:04,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:04,972 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 15:16:04,998 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 15:16:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:05,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-19 15:16:05,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:16:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 15:16:05,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:16:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:16:05,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251757901] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:16:05,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:16:05,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 5] total 8 [2024-02-19 15:16:05,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200342391] [2024-02-19 15:16:05,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:16:05,245 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-19 15:16:05,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:05,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-19 15:16:05,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-02-19 15:16:05,260 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-02-19 15:16:05,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 110 transitions, 862 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 15:16:05,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:05,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-02-19 15:16:05,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:06,171 INFO L124 PetriNetUnfolderBase]: 4275/6514 cut-off events. [2024-02-19 15:16:06,172 INFO L125 PetriNetUnfolderBase]: For 12325/12333 co-relation queries the response was YES. [2024-02-19 15:16:06,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25512 conditions, 6514 events. 4275/6514 cut-off events. For 12325/12333 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 34217 event pairs, 59 based on Foata normal form. 93/6289 useless extension candidates. Maximal degree in co-relation 21813. Up to 3499 conditions per place. [2024-02-19 15:16:06,203 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 127 selfloop transitions, 26 changer transitions 323/483 dead transitions. [2024-02-19 15:16:06,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 483 transitions, 4629 flow [2024-02-19 15:16:06,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-19 15:16:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-19 15:16:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 286 transitions. [2024-02-19 15:16:06,208 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5375939849624061 [2024-02-19 15:16:06,210 INFO L308 CegarLoopForPetriNet]: 40 programPoint places, 23 predicate places. [2024-02-19 15:16:06,210 INFO L507 AbstractCegarLoop]: Abstraction has has 63 places, 483 transitions, 4629 flow [2024-02-19 15:16:06,211 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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 15:16:06,211 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:06,211 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:06,230 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 15:16:06,430 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:06,431 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:06,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:06,431 INFO L85 PathProgramCache]: Analyzing trace with hash 904735016, now seen corresponding path program 2 times [2024-02-19 15:16:06,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:06,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994434239] [2024-02-19 15:16:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:06,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:07,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:07,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994434239] [2024-02-19 15:16:07,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994434239] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:16:07,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856501527] [2024-02-19 15:16:07,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 15:16:07,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:07,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:07,181 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 15:16:07,201 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 15:16:07,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 15:16:07,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:16:07,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 34 conjunts are in the unsatisfiable core [2024-02-19 15:16:07,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:16:07,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-02-19 15:16:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:07,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:16:08,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2024-02-19 15:16:08,378 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:16:08,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 46 [2024-02-19 15:16:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:08,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856501527] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:16:08,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:16:08,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 33 [2024-02-19 15:16:08,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684800588] [2024-02-19 15:16:08,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:16:08,492 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-02-19 15:16:08,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:08,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-02-19 15:16:08,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2024-02-19 15:16:08,605 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 38 [2024-02-19 15:16:08,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 483 transitions, 4629 flow. Second operand has 34 states, 34 states have (on average 6.5588235294117645) internal successors, (223), 34 states have internal predecessors, (223), 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 15:16:08,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:08,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 38 [2024-02-19 15:16:08,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:17,304 INFO L124 PetriNetUnfolderBase]: 19306/28940 cut-off events. [2024-02-19 15:16:17,304 INFO L125 PetriNetUnfolderBase]: For 54091/54091 co-relation queries the response was YES. [2024-02-19 15:16:17,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137834 conditions, 28940 events. 19306/28940 cut-off events. For 54091/54091 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 179431 event pairs, 331 based on Foata normal form. 244/28071 useless extension candidates. Maximal degree in co-relation 48770. Up to 15835 conditions per place. [2024-02-19 15:16:17,462 INFO L140 encePairwiseOnDemand]: 19/38 looper letters, 460 selfloop transitions, 120 changer transitions 2456/3037 dead transitions. [2024-02-19 15:16:17,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 3037 transitions, 32156 flow [2024-02-19 15:16:17,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2024-02-19 15:16:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2024-02-19 15:16:17,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 1479 transitions. [2024-02-19 15:16:17,470 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3506401137980085 [2024-02-19 15:16:17,471 INFO L308 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-02-19 15:16:17,471 INFO L507 AbstractCegarLoop]: Abstraction has has 173 places, 3037 transitions, 32156 flow [2024-02-19 15:16:17,471 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.5588235294117645) internal successors, (223), 34 states have internal predecessors, (223), 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 15:16:17,471 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:17,472 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:17,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-02-19 15:16:17,687 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:17,688 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:17,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:17,688 INFO L85 PathProgramCache]: Analyzing trace with hash 887168208, now seen corresponding path program 3 times [2024-02-19 15:16:17,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:17,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893597030] [2024-02-19 15:16:17,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:17,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:19,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:19,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893597030] [2024-02-19 15:16:19,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893597030] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:16:19,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695614967] [2024-02-19 15:16:19,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 15:16:19,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:19,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:19,088 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 15:16:19,109 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 15:16:19,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 15:16:19,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:16:19,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 18 conjunts are in the unsatisfiable core [2024-02-19 15:16:19,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:16:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-19 15:16:19,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:16:19,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:16:19,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-02-19 15:16:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-19 15:16:19,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695614967] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:16:19,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:16:19,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2024-02-19 15:16:19,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431473076] [2024-02-19 15:16:19,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:16:19,967 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-02-19 15:16:19,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:19,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-02-19 15:16:19,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2024-02-19 15:16:20,034 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 38 [2024-02-19 15:16:20,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 3037 transitions, 32156 flow. Second operand has 33 states, 33 states have (on average 6.7272727272727275) internal successors, (222), 33 states have internal predecessors, (222), 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 15:16:20,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:20,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 38 [2024-02-19 15:16:20,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:31,467 INFO L124 PetriNetUnfolderBase]: 25133/37579 cut-off events. [2024-02-19 15:16:31,467 INFO L125 PetriNetUnfolderBase]: For 68868/68868 co-relation queries the response was YES. [2024-02-19 15:16:31,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217116 conditions, 37579 events. 25133/37579 cut-off events. For 68868/68868 co-relation queries the response was YES. Maximal size of possible extension queue 826. Compared 238624 event pairs, 242 based on Foata normal form. 164/36517 useless extension candidates. Maximal degree in co-relation 78940. Up to 20902 conditions per place. [2024-02-19 15:16:31,643 INFO L140 encePairwiseOnDemand]: 20/38 looper letters, 675 selfloop transitions, 205 changer transitions 3953/4834 dead transitions. [2024-02-19 15:16:31,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 4834 transitions, 60088 flow [2024-02-19 15:16:31,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-02-19 15:16:31,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2024-02-19 15:16:31,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 742 transitions. [2024-02-19 15:16:31,646 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3425669436749769 [2024-02-19 15:16:31,647 INFO L308 CegarLoopForPetriNet]: 40 programPoint places, 189 predicate places. [2024-02-19 15:16:31,647 INFO L507 AbstractCegarLoop]: Abstraction has has 229 places, 4834 transitions, 60088 flow [2024-02-19 15:16:31,648 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.7272727272727275) internal successors, (222), 33 states have internal predecessors, (222), 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 15:16:31,648 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:31,648 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:31,668 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 15:16:31,864 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:31,865 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:31,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:31,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1736230269, now seen corresponding path program 4 times [2024-02-19 15:16:31,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:31,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646279172] [2024-02-19 15:16:31,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:31,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:16:31,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:31,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646279172] [2024-02-19 15:16:31,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646279172] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:16:31,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667616103] [2024-02-19 15:16:31,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 15:16:31,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:31,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:31,963 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 15:16:31,964 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 15:16:32,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 15:16:32,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:16:32,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-19 15:16:32,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:16:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:16:32,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:16:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:16:32,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667616103] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:16:32,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:16:32,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2024-02-19 15:16:32,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989122019] [2024-02-19 15:16:32,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:16:32,201 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-19 15:16:32,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:32,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-19 15:16:32,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-02-19 15:16:32,205 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-02-19 15:16:32,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 4834 transitions, 60088 flow. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 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 15:16:32,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:32,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-02-19 15:16:32,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:54,374 INFO L124 PetriNetUnfolderBase]: 56608/84609 cut-off events. [2024-02-19 15:16:54,374 INFO L125 PetriNetUnfolderBase]: For 263489/263489 co-relation queries the response was YES. [2024-02-19 15:16:54,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538620 conditions, 84609 events. 56608/84609 cut-off events. For 263489/263489 co-relation queries the response was YES. Maximal size of possible extension queue 1646. Compared 589861 event pairs, 572 based on Foata normal form. 1176/82703 useless extension candidates. Maximal degree in co-relation 212314. Up to 47884 conditions per place. [2024-02-19 15:16:54,819 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 962 selfloop transitions, 65 changer transitions 7278/8585 dead transitions. [2024-02-19 15:16:54,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 8585 transitions, 127726 flow [2024-02-19 15:16:54,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 15:16:54,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 15:16:54,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-02-19 15:16:54,823 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7763157894736842 [2024-02-19 15:16:54,823 INFO L308 CegarLoopForPetriNet]: 40 programPoint places, 192 predicate places. [2024-02-19 15:16:54,824 INFO L507 AbstractCegarLoop]: Abstraction has has 232 places, 8585 transitions, 127726 flow [2024-02-19 15:16:54,824 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 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 15:16:54,824 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:54,824 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:54,840 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 15:16:55,040 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:55,040 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:55,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:55,041 INFO L85 PathProgramCache]: Analyzing trace with hash -909807853, now seen corresponding path program 5 times [2024-02-19 15:16:55,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:55,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428583291] [2024-02-19 15:16:55,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:55,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 15:16:55,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:55,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428583291] [2024-02-19 15:16:55,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428583291] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:16:55,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750261061] [2024-02-19 15:16:55,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 15:16:55,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:55,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:55,198 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 15:16:55,200 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 15:16:55,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-19 15:16:55,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:16:55,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-19 15:16:55,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:16:55,369 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 15:16:55,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:16:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 15:16:55,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750261061] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:16:55,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:16:55,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-02-19 15:16:55,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714013311] [2024-02-19 15:16:55,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:16:55,439 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-19 15:16:55,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:55,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-19 15:16:55,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-02-19 15:16:55,441 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-02-19 15:16:55,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 8585 transitions, 127726 flow. Second operand has 12 states, 12 states have (on average 18.0) internal successors, (216), 12 states have internal predecessors, (216), 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 15:16:55,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:55,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-02-19 15:16:55,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:17:32,698 INFO L124 PetriNetUnfolderBase]: 46046/69057 cut-off events. [2024-02-19 15:17:32,698 INFO L125 PetriNetUnfolderBase]: For 327797/327797 co-relation queries the response was YES. [2024-02-19 15:17:32,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478409 conditions, 69057 events. 46046/69057 cut-off events. For 327797/327797 co-relation queries the response was YES. Maximal size of possible extension queue 1152. Compared 465545 event pairs, 452 based on Foata normal form. 182/66753 useless extension candidates. Maximal degree in co-relation 230338. Up to 38836 conditions per place. [2024-02-19 15:17:33,093 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 824 selfloop transitions, 3 changer transitions 6305/7354 dead transitions. [2024-02-19 15:17:33,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 7354 transitions, 119982 flow [2024-02-19 15:17:33,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-19 15:17:33,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-19 15:17:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-02-19 15:17:33,096 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6278195488721805 [2024-02-19 15:17:33,099 INFO L308 CegarLoopForPetriNet]: 40 programPoint places, 197 predicate places. [2024-02-19 15:17:33,100 INFO L507 AbstractCegarLoop]: Abstraction has has 237 places, 7354 transitions, 119982 flow [2024-02-19 15:17:33,100 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.0) internal successors, (216), 12 states have internal predecessors, (216), 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 15:17:33,100 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:17:33,100 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:17:33,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-19 15:17:33,304 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:17:33,305 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:17:33,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:17:33,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1629408773, now seen corresponding path program 6 times [2024-02-19 15:17:33,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:17:33,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525967686] [2024-02-19 15:17:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:17:33,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:17:33,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:17:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:17:34,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:17:34,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525967686] [2024-02-19 15:17:34,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525967686] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:17:34,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029483787] [2024-02-19 15:17:34,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 15:17:34,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:17:34,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:17:34,655 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:17:34,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-19 15:17:34,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-19 15:17:34,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:17:34,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-19 15:17:34,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:17:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:17:35,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:17:35,969 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:17:35,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2024-02-19 15:17:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:17:36,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029483787] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:17:36,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:17:36,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 42 [2024-02-19 15:17:36,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151386608] [2024-02-19 15:17:36,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:17:36,439 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-02-19 15:17:36,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:17:36,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-02-19 15:17:36,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1586, Unknown=0, NotChecked=0, Total=1806 [2024-02-19 15:17:36,713 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-02-19 15:17:36,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 7354 transitions, 119982 flow. Second operand has 43 states, 43 states have (on average 10.488372093023257) internal successors, (451), 43 states have internal predecessors, (451), 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 15:17:36,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:17:36,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-02-19 15:17:36,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand