./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.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 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:34:26,907 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:34:26,980 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:34:26,991 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:34:26,992 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:34:27,026 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:34:27,027 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:34:27,028 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:34:27,029 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:34:27,030 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:34:27,030 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:34:27,031 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:34:27,032 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:34:27,033 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:34:27,034 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:34:27,034 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:34:27,035 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:34:27,038 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:34:27,038 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:34:27,038 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:34:27,038 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:34:27,040 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:34:27,040 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:34:27,040 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:34:27,041 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:34:27,041 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:34:27,041 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:34:27,042 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:34:27,042 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:34:27,042 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:34:27,043 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:34:27,044 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:34:27,044 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:34:27,044 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:34:27,044 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:34:27,045 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:34:27,045 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:34:27,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:34:27,045 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:34:27,045 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:34:27,046 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:34:27,046 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:34:27,046 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:34:27,046 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec [2024-01-27 15:34:27,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:34:27,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:34:27,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:34:27,340 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:34:27,340 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:34:27,341 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2024-01-27 15:34:28,514 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:34:28,708 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:34:28,709 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2024-01-27 15:34:28,723 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bebf2be79/7b7033ffa9a9470083db7e4dd75ecd8d/FLAGed2e655a9 [2024-01-27 15:34:28,737 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bebf2be79/7b7033ffa9a9470083db7e4dd75ecd8d [2024-01-27 15:34:28,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:34:28,740 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:34:28,742 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:34:28,742 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:34:28,747 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:34:28,748 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:34:28" (1/1) ... [2024-01-27 15:34:28,749 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fafd88c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:34:28, skipping insertion in model container [2024-01-27 15:34:28,749 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:34:28" (1/1) ... [2024-01-27 15:34:28,773 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:34:28,920 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-bad-counter-queue2.wvr.c[2297,2310] [2024-01-27 15:34:28,930 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:34:28,938 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:34:28,955 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-bad-counter-queue2.wvr.c[2297,2310] [2024-01-27 15:34:28,960 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:34:28,973 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:34:28,974 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:34:28 WrapperNode [2024-01-27 15:34:28,974 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:34:28,989 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:34:28,992 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:34:28,992 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:34:28,999 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:34:28" (1/1) ... [2024-01-27 15:34:29,011 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:34:28" (1/1) ... [2024-01-27 15:34:29,033 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2024-01-27 15:34:29,042 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:34:29,043 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:34:29,043 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:34:29,043 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:34:29,054 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:34:28" (1/1) ... [2024-01-27 15:34:29,054 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:34:28" (1/1) ... [2024-01-27 15:34:29,057 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:34:28" (1/1) ... [2024-01-27 15:34:29,071 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 3, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-27 15:34:29,072 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:34:28" (1/1) ... [2024-01-27 15:34:29,072 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:34:28" (1/1) ... [2024-01-27 15:34:29,079 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:34:28" (1/1) ... [2024-01-27 15:34:29,082 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:34:28" (1/1) ... [2024-01-27 15:34:29,084 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:34:28" (1/1) ... [2024-01-27 15:34:29,085 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:34:28" (1/1) ... [2024-01-27 15:34:29,089 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:34:29,090 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:34:29,090 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:34:29,090 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:34:29,091 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:34:28" (1/1) ... [2024-01-27 15:34:29,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:34:29,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:29,145 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) [2024-01-27 15:34:29,166 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 [2024-01-27 15:34:29,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:34:29,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:34:29,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:34:29,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:34:29,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:34:29,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:34:29,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:34:29,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:34:29,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:34:29,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:34:29,202 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:34:29,202 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:34:29,202 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:34:29,202 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:34:29,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:34:29,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:34:29,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:34:29,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:34:29,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:34:29,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:34:29,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:34:29,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:34:29,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:34:29,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:34:29,205 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:34:29,296 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:34:29,298 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:34:29,562 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:34:29,562 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:34:29,809 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:34:29,809 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:34:29,810 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:34:29 BoogieIcfgContainer [2024-01-27 15:34:29,810 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:34:29,813 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:34:29,813 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:34:29,816 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:34:29,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:34:28" (1/3) ... [2024-01-27 15:34:29,817 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687d3c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:34:29, skipping insertion in model container [2024-01-27 15:34:29,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:34:28" (2/3) ... [2024-01-27 15:34:29,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687d3c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:34:29, skipping insertion in model container [2024-01-27 15:34:29,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:34:29" (3/3) ... [2024-01-27 15:34:29,819 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2024-01-27 15:34:29,827 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:34:29,835 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:34:29,836 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:34:29,836 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:34:29,887 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:34:29,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 25 transitions, 64 flow [2024-01-27 15:34:29,961 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2024-01-27 15:34:29,962 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:34:29,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 23 events. 3/23 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-01-27 15:34:29,965 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 25 transitions, 64 flow [2024-01-27 15:34:29,969 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 22 transitions, 56 flow [2024-01-27 15:34:29,977 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:34:29,982 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@633ecdf6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:34:29,982 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:34:29,990 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:34:29,990 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2024-01-27 15:34:29,990 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:34:29,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:29,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:29,992 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:29,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:29,997 INFO L85 PathProgramCache]: Analyzing trace with hash 380329243, now seen corresponding path program 1 times [2024-01-27 15:34:30,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:30,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265540890] [2024-01-27 15:34:30,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:30,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:30,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:30,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265540890] [2024-01-27 15:34:30,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265540890] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:34:30,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:34:30,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:34:30,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344207372] [2024-01-27 15:34:30,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:34:30,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:34:30,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:30,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:34:30,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:34:30,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-01-27 15:34:30,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2024-01-27 15:34:30,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:30,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-01-27 15:34:30,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:30,512 INFO L124 PetriNetUnfolderBase]: 100/194 cut-off events. [2024-01-27 15:34:30,513 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-01-27 15:34:30,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 194 events. 100/194 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 626 event pairs, 24 based on Foata normal form. 1/190 useless extension candidates. Maximal degree in co-relation 314. Up to 122 conditions per place. [2024-01-27 15:34:30,520 INFO L140 encePairwiseOnDemand]: 21/25 looper letters, 27 selfloop transitions, 3 changer transitions 1/34 dead transitions. [2024-01-27 15:34:30,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 151 flow [2024-01-27 15:34:30,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:34:30,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:34:30,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2024-01-27 15:34:30,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-01-27 15:34:30,564 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 56 flow. Second operand 3 states and 47 transitions. [2024-01-27 15:34:30,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 151 flow [2024-01-27 15:34:30,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 34 transitions, 137 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:34:30,569 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 67 flow [2024-01-27 15:34:30,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2024-01-27 15:34:30,575 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2024-01-27 15:34:30,576 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 67 flow [2024-01-27 15:34:30,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2024-01-27 15:34:30,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:30,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:30,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:34:30,577 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:30,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:30,579 INFO L85 PathProgramCache]: Analyzing trace with hash 468797561, now seen corresponding path program 1 times [2024-01-27 15:34:30,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:30,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908297499] [2024-01-27 15:34:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:30,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:30,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:30,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908297499] [2024-01-27 15:34:30,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908297499] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:34:30,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:34:30,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:34:30,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711153068] [2024-01-27 15:34:30,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:34:30,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:34:30,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:30,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:34:30,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:34:30,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-27 15:34:30,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 67 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-01-27 15:34:30,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:30,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-27 15:34:30,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:31,042 INFO L124 PetriNetUnfolderBase]: 184/358 cut-off events. [2024-01-27 15:34:31,043 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-01-27 15:34:31,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 358 events. 184/358 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1459 event pairs, 113 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 277. Up to 223 conditions per place. [2024-01-27 15:34:31,050 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 42 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2024-01-27 15:34:31,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 49 transitions, 228 flow [2024-01-27 15:34:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:34:31,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:34:31,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-01-27 15:34:31,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512 [2024-01-27 15:34:31,054 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 67 flow. Second operand 5 states and 64 transitions. [2024-01-27 15:34:31,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 49 transitions, 228 flow [2024-01-27 15:34:31,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 49 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:34:31,060 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 100 flow [2024-01-27 15:34:31,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2024-01-27 15:34:31,061 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2024-01-27 15:34:31,062 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 100 flow [2024-01-27 15:34:31,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-01-27 15:34:31,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:31,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:31,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:34:31,065 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:31,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:31,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1254627800, now seen corresponding path program 1 times [2024-01-27 15:34:31,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:31,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780544083] [2024-01-27 15:34:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:31,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:31,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:31,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780544083] [2024-01-27 15:34:31,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780544083] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:34:31,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:34:31,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:34:31,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677460710] [2024-01-27 15:34:31,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:34:31,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:34:31,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:31,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:34:31,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:34:31,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-27 15:34:31,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-01-27 15:34:31,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:31,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-27 15:34:31,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:31,314 INFO L124 PetriNetUnfolderBase]: 149/292 cut-off events. [2024-01-27 15:34:31,314 INFO L125 PetriNetUnfolderBase]: For 102/111 co-relation queries the response was YES. [2024-01-27 15:34:31,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 292 events. 149/292 cut-off events. For 102/111 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1094 event pairs, 103 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 557. Up to 223 conditions per place. [2024-01-27 15:34:31,316 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 21 selfloop transitions, 2 changer transitions 17/42 dead transitions. [2024-01-27 15:34:31,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 42 transitions, 221 flow [2024-01-27 15:34:31,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:34:31,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:34:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-01-27 15:34:31,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.472 [2024-01-27 15:34:31,318 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 100 flow. Second operand 5 states and 59 transitions. [2024-01-27 15:34:31,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 42 transitions, 221 flow [2024-01-27 15:34:31,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 42 transitions, 217 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:34:31,320 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 88 flow [2024-01-27 15:34:31,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2024-01-27 15:34:31,320 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 10 predicate places. [2024-01-27 15:34:31,321 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 88 flow [2024-01-27 15:34:31,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-01-27 15:34:31,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:31,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:31,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:34:31,321 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:31,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:31,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1820180955, now seen corresponding path program 1 times [2024-01-27 15:34:31,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:31,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180119436] [2024-01-27 15:34:31,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:31,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:31,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:31,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180119436] [2024-01-27 15:34:31,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180119436] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:31,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81657901] [2024-01-27 15:34:31,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:31,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:31,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:31,524 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) [2024-01-27 15:34:31,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:34:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:31,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:34:31,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:31,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:31,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81657901] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:31,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:34:31,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-01-27 15:34:31,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860198969] [2024-01-27 15:34:31,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:34:31,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:34:31,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:31,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:34:31,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:34:31,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-27 15:34:31,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-01-27 15:34:31,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:31,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-27 15:34:31,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:31,836 INFO L124 PetriNetUnfolderBase]: 125/229 cut-off events. [2024-01-27 15:34:31,836 INFO L125 PetriNetUnfolderBase]: For 76/91 co-relation queries the response was YES. [2024-01-27 15:34:31,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610 conditions, 229 events. 125/229 cut-off events. For 76/91 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 781 event pairs, 35 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 593. Up to 121 conditions per place. [2024-01-27 15:34:31,838 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 27 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2024-01-27 15:34:31,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 34 transitions, 181 flow [2024-01-27 15:34:31,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:34:31,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:34:31,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2024-01-27 15:34:31,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-01-27 15:34:31,842 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 88 flow. Second operand 5 states and 50 transitions. [2024-01-27 15:34:31,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 34 transitions, 181 flow [2024-01-27 15:34:31,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 34 transitions, 157 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-01-27 15:34:31,844 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 93 flow [2024-01-27 15:34:31,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2024-01-27 15:34:31,846 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2024-01-27 15:34:31,846 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 93 flow [2024-01-27 15:34:31,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-01-27 15:34:31,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:31,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:31,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:32,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:32,061 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:32,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:32,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1013209238, now seen corresponding path program 1 times [2024-01-27 15:34:32,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:32,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302596207] [2024-01-27 15:34:32,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:32,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:32,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:32,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302596207] [2024-01-27 15:34:32,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302596207] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:32,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812130411] [2024-01-27 15:34:32,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:32,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:32,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:32,181 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) [2024-01-27 15:34:32,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:34:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:32,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:34:32,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:32,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:32,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812130411] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:32,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:34:32,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-01-27 15:34:32,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949280167] [2024-01-27 15:34:32,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:34:32,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:34:32,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:32,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:34:32,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:34:32,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-27 15:34:32,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-01-27 15:34:32,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:32,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-27 15:34:32,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:32,434 INFO L124 PetriNetUnfolderBase]: 122/226 cut-off events. [2024-01-27 15:34:32,435 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2024-01-27 15:34:32,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600 conditions, 226 events. 122/226 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 727 event pairs, 32 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 579. Up to 113 conditions per place. [2024-01-27 15:34:32,436 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-01-27 15:34:32,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 190 flow [2024-01-27 15:34:32,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:34:32,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:34:32,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2024-01-27 15:34:32,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-01-27 15:34:32,439 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 93 flow. Second operand 5 states and 50 transitions. [2024-01-27 15:34:32,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 190 flow [2024-01-27 15:34:32,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-27 15:34:32,441 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 110 flow [2024-01-27 15:34:32,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2024-01-27 15:34:32,441 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 9 predicate places. [2024-01-27 15:34:32,441 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 110 flow [2024-01-27 15:34:32,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-01-27 15:34:32,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:32,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:32,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:32,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:32,660 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:32,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:32,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2136155956, now seen corresponding path program 1 times [2024-01-27 15:34:32,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:32,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588323379] [2024-01-27 15:34:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:32,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:33,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:33,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588323379] [2024-01-27 15:34:33,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588323379] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:33,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969237404] [2024-01-27 15:34:33,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:33,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:33,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:33,245 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) [2024-01-27 15:34:33,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:34:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:33,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 15:34:33,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:33,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:33,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:33,487 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 21 treesize of output 14 [2024-01-27 15:34:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:33,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969237404] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:33,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:33,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2024-01-27 15:34:33,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496032375] [2024-01-27 15:34:33,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:33,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:34:33,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:33,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:34:33,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:34:33,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-01-27 15:34:33,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 110 flow. Second operand has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 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) [2024-01-27 15:34:33,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:33,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-01-27 15:34:33,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:33,802 INFO L124 PetriNetUnfolderBase]: 168/340 cut-off events. [2024-01-27 15:34:33,802 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2024-01-27 15:34:33,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 979 conditions, 340 events. 168/340 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1311 event pairs, 27 based on Foata normal form. 2/340 useless extension candidates. Maximal degree in co-relation 955. Up to 180 conditions per place. [2024-01-27 15:34:33,805 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 45 selfloop transitions, 24 changer transitions 2/76 dead transitions. [2024-01-27 15:34:33,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 76 transitions, 428 flow [2024-01-27 15:34:33,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:34:33,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:34:33,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-01-27 15:34:33,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4581818181818182 [2024-01-27 15:34:33,807 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 110 flow. Second operand 11 states and 126 transitions. [2024-01-27 15:34:33,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 76 transitions, 428 flow [2024-01-27 15:34:33,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 76 transitions, 417 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-27 15:34:33,810 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 279 flow [2024-01-27 15:34:33,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=279, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2024-01-27 15:34:33,811 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 21 predicate places. [2024-01-27 15:34:33,811 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 279 flow [2024-01-27 15:34:33,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 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) [2024-01-27 15:34:33,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:33,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:33,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:34,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:34,031 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:34,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:34,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1384415404, now seen corresponding path program 2 times [2024-01-27 15:34:34,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:34,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395397083] [2024-01-27 15:34:34,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:34,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:34,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:34,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395397083] [2024-01-27 15:34:34,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395397083] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:34,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431097269] [2024-01-27 15:34:34,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:34:34,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:34,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:34,522 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) [2024-01-27 15:34:34,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:34:34,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:34:34,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:34:34,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:34:34,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:34,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:34,735 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:34,735 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 21 treesize of output 14 [2024-01-27 15:34:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:34,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431097269] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:34,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:34,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 13 [2024-01-27 15:34:34,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870376575] [2024-01-27 15:34:34,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:34,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:34:34,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:34,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:34:34,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:34:34,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-01-27 15:34:34,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 279 flow. Second operand has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 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) [2024-01-27 15:34:34,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:34,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-01-27 15:34:34,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:35,114 INFO L124 PetriNetUnfolderBase]: 210/421 cut-off events. [2024-01-27 15:34:35,114 INFO L125 PetriNetUnfolderBase]: For 625/625 co-relation queries the response was YES. [2024-01-27 15:34:35,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 421 events. 210/421 cut-off events. For 625/625 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1781 event pairs, 36 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 1433. Up to 186 conditions per place. [2024-01-27 15:34:35,118 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 38 selfloop transitions, 40 changer transitions 1/84 dead transitions. [2024-01-27 15:34:35,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 84 transitions, 610 flow [2024-01-27 15:34:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:34:35,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:34:35,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-01-27 15:34:35,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452 [2024-01-27 15:34:35,120 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 279 flow. Second operand 10 states and 113 transitions. [2024-01-27 15:34:35,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 84 transitions, 610 flow [2024-01-27 15:34:35,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 84 transitions, 578 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-01-27 15:34:35,124 INFO L231 Difference]: Finished difference. Result has 56 places, 62 transitions, 465 flow [2024-01-27 15:34:35,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=465, PETRI_PLACES=56, PETRI_TRANSITIONS=62} [2024-01-27 15:34:35,125 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 30 predicate places. [2024-01-27 15:34:35,125 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 62 transitions, 465 flow [2024-01-27 15:34:35,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 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) [2024-01-27 15:34:35,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:35,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:35,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:35,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:35,343 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:35,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:35,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1566706834, now seen corresponding path program 3 times [2024-01-27 15:34:35,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:35,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617439444] [2024-01-27 15:34:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:35,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:35,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:35,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617439444] [2024-01-27 15:34:35,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617439444] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:35,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126441952] [2024-01-27 15:34:35,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:34:35,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:35,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:35,809 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) [2024-01-27 15:34:35,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 15:34:35,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:34:35,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:34:35,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:34:35,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:35,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:36,010 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:36,011 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 17 treesize of output 14 [2024-01-27 15:34:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:36,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126441952] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:36,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:36,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 13 [2024-01-27 15:34:36,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008184127] [2024-01-27 15:34:36,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:36,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:34:36,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:36,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:34:36,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:34:36,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-01-27 15:34:36,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 465 flow. Second operand has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 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) [2024-01-27 15:34:36,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:36,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-01-27 15:34:36,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:36,378 INFO L124 PetriNetUnfolderBase]: 273/559 cut-off events. [2024-01-27 15:34:36,379 INFO L125 PetriNetUnfolderBase]: For 1141/1149 co-relation queries the response was YES. [2024-01-27 15:34:36,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2090 conditions, 559 events. 273/559 cut-off events. For 1141/1149 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2678 event pairs, 38 based on Foata normal form. 9/564 useless extension candidates. Maximal degree in co-relation 2055. Up to 210 conditions per place. [2024-01-27 15:34:36,384 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 47 selfloop transitions, 56 changer transitions 1/109 dead transitions. [2024-01-27 15:34:36,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 109 transitions, 880 flow [2024-01-27 15:34:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:34:36,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:34:36,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-01-27 15:34:36,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533333333333333 [2024-01-27 15:34:36,386 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 465 flow. Second operand 12 states and 136 transitions. [2024-01-27 15:34:36,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 109 transitions, 880 flow [2024-01-27 15:34:36,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 109 transitions, 815 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-01-27 15:34:36,392 INFO L231 Difference]: Finished difference. Result has 65 places, 78 transitions, 665 flow [2024-01-27 15:34:36,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=665, PETRI_PLACES=65, PETRI_TRANSITIONS=78} [2024-01-27 15:34:36,393 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 39 predicate places. [2024-01-27 15:34:36,393 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 78 transitions, 665 flow [2024-01-27 15:34:36,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 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) [2024-01-27 15:34:36,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:36,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:36,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:36,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:36,609 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:36,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:36,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1654094866, now seen corresponding path program 4 times [2024-01-27 15:34:36,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:36,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562476647] [2024-01-27 15:34:36,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:36,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:36,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:36,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:36,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562476647] [2024-01-27 15:34:36,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562476647] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:36,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387167245] [2024-01-27 15:34:36,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:34:36,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:36,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:36,986 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) [2024-01-27 15:34:37,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:34:37,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:34:37,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:34:37,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 15:34:37,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:37,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:37,173 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:37,173 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 21 treesize of output 14 [2024-01-27 15:34:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:37,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387167245] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:37,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:37,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2024-01-27 15:34:37,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541921217] [2024-01-27 15:34:37,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:37,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:34:37,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:37,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:34:37,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:34:37,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-01-27 15:34:37,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 78 transitions, 665 flow. Second operand has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 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) [2024-01-27 15:34:37,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:37,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-01-27 15:34:37,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:37,578 INFO L124 PetriNetUnfolderBase]: 315/637 cut-off events. [2024-01-27 15:34:37,578 INFO L125 PetriNetUnfolderBase]: For 1458/1458 co-relation queries the response was YES. [2024-01-27 15:34:37,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2498 conditions, 637 events. 315/637 cut-off events. For 1458/1458 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3170 event pairs, 77 based on Foata normal form. 1/634 useless extension candidates. Maximal degree in co-relation 2461. Up to 473 conditions per place. [2024-01-27 15:34:37,586 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 77 selfloop transitions, 22 changer transitions 1/105 dead transitions. [2024-01-27 15:34:37,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 105 transitions, 990 flow [2024-01-27 15:34:37,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:34:37,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:34:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-01-27 15:34:37,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-01-27 15:34:37,587 INFO L175 Difference]: Start difference. First operand has 65 places, 78 transitions, 665 flow. Second operand 9 states and 99 transitions. [2024-01-27 15:34:37,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 105 transitions, 990 flow [2024-01-27 15:34:37,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 948 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-01-27 15:34:37,596 INFO L231 Difference]: Finished difference. Result has 74 places, 88 transitions, 770 flow [2024-01-27 15:34:37,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=770, PETRI_PLACES=74, PETRI_TRANSITIONS=88} [2024-01-27 15:34:37,598 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 48 predicate places. [2024-01-27 15:34:37,598 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 88 transitions, 770 flow [2024-01-27 15:34:37,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 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) [2024-01-27 15:34:37,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:37,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:37,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:37,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:37,813 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:37,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:37,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1453233878, now seen corresponding path program 5 times [2024-01-27 15:34:37,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:37,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514326806] [2024-01-27 15:34:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:37,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:38,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:38,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514326806] [2024-01-27 15:34:38,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514326806] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:38,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845007626] [2024-01-27 15:34:38,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:34:38,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:38,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:38,139 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:34:38,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:34:38,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:34:38,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:34:38,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:34:38,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:38,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:38,364 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:38,364 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 21 treesize of output 14 [2024-01-27 15:34:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:38,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845007626] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:38,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:38,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2024-01-27 15:34:38,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781171567] [2024-01-27 15:34:38,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:38,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:34:38,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:38,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:34:38,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:34:38,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-01-27 15:34:38,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 770 flow. Second operand has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 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) [2024-01-27 15:34:38,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:38,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-01-27 15:34:38,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:38,761 INFO L124 PetriNetUnfolderBase]: 351/716 cut-off events. [2024-01-27 15:34:38,761 INFO L125 PetriNetUnfolderBase]: For 1782/1782 co-relation queries the response was YES. [2024-01-27 15:34:38,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2832 conditions, 716 events. 351/716 cut-off events. For 1782/1782 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3756 event pairs, 82 based on Foata normal form. 1/713 useless extension candidates. Maximal degree in co-relation 2790. Up to 477 conditions per place. [2024-01-27 15:34:38,767 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 79 selfloop transitions, 36 changer transitions 1/121 dead transitions. [2024-01-27 15:34:38,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 121 transitions, 1157 flow [2024-01-27 15:34:38,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:34:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:34:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-01-27 15:34:38,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.444 [2024-01-27 15:34:38,769 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 770 flow. Second operand 10 states and 111 transitions. [2024-01-27 15:34:38,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 121 transitions, 1157 flow [2024-01-27 15:34:38,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 121 transitions, 1145 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-01-27 15:34:38,776 INFO L231 Difference]: Finished difference. Result has 82 places, 101 transitions, 950 flow [2024-01-27 15:34:38,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=950, PETRI_PLACES=82, PETRI_TRANSITIONS=101} [2024-01-27 15:34:38,777 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 56 predicate places. [2024-01-27 15:34:38,777 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 101 transitions, 950 flow [2024-01-27 15:34:38,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 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) [2024-01-27 15:34:38,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:38,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:38,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:38,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:38,993 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:38,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:38,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1062076604, now seen corresponding path program 6 times [2024-01-27 15:34:38,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:38,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384455177] [2024-01-27 15:34:38,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:38,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:39,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:39,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384455177] [2024-01-27 15:34:39,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384455177] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:39,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246121623] [2024-01-27 15:34:39,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:34:39,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:39,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:39,356 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:34:39,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:34:39,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:34:39,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:34:39,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:34:39,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:39,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:39,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:39,569 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 17 treesize of output 14 [2024-01-27 15:34:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:39,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246121623] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:39,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:39,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 15 [2024-01-27 15:34:39,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863225080] [2024-01-27 15:34:39,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:39,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:34:39,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:39,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:34:39,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:34:39,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-01-27 15:34:39,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 101 transitions, 950 flow. Second operand has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 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) [2024-01-27 15:34:39,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:39,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-01-27 15:34:39,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:39,958 INFO L124 PetriNetUnfolderBase]: 407/817 cut-off events. [2024-01-27 15:34:39,958 INFO L125 PetriNetUnfolderBase]: For 2522/2526 co-relation queries the response was YES. [2024-01-27 15:34:39,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3422 conditions, 817 events. 407/817 cut-off events. For 2522/2526 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4324 event pairs, 84 based on Foata normal form. 5/820 useless extension candidates. Maximal degree in co-relation 3377. Up to 495 conditions per place. [2024-01-27 15:34:39,965 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 82 selfloop transitions, 52 changer transitions 1/140 dead transitions. [2024-01-27 15:34:39,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 140 transitions, 1439 flow [2024-01-27 15:34:39,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:34:39,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:34:39,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-01-27 15:34:39,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2024-01-27 15:34:39,967 INFO L175 Difference]: Start difference. First operand has 82 places, 101 transitions, 950 flow. Second operand 12 states and 128 transitions. [2024-01-27 15:34:39,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 140 transitions, 1439 flow [2024-01-27 15:34:39,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 140 transitions, 1373 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-01-27 15:34:39,979 INFO L231 Difference]: Finished difference. Result has 92 places, 117 transitions, 1170 flow [2024-01-27 15:34:39,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1170, PETRI_PLACES=92, PETRI_TRANSITIONS=117} [2024-01-27 15:34:39,980 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 66 predicate places. [2024-01-27 15:34:39,980 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 117 transitions, 1170 flow [2024-01-27 15:34:39,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 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) [2024-01-27 15:34:39,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:39,981 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:39,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:40,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-01-27 15:34:40,197 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:40,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:40,198 INFO L85 PathProgramCache]: Analyzing trace with hash 170566836, now seen corresponding path program 7 times [2024-01-27 15:34:40,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:40,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980320977] [2024-01-27 15:34:40,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:40,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:40,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:40,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980320977] [2024-01-27 15:34:40,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980320977] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:40,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104354191] [2024-01-27 15:34:40,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:34:40,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:40,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:40,300 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:34:40,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:34:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:40,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:34:40,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:40,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:40,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104354191] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:40,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:40,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-27 15:34:40,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506553931] [2024-01-27 15:34:40,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:40,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:34:40,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:40,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:34:40,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:34:40,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-27 15:34:40,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 117 transitions, 1170 flow. Second operand has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 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) [2024-01-27 15:34:40,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:40,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-27 15:34:40,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:40,870 INFO L124 PetriNetUnfolderBase]: 907/1752 cut-off events. [2024-01-27 15:34:40,871 INFO L125 PetriNetUnfolderBase]: For 5999/6003 co-relation queries the response was YES. [2024-01-27 15:34:40,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7457 conditions, 1752 events. 907/1752 cut-off events. For 5999/6003 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10595 event pairs, 408 based on Foata normal form. 62/1814 useless extension candidates. Maximal degree in co-relation 5632. Up to 928 conditions per place. [2024-01-27 15:34:40,886 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 209 selfloop transitions, 26 changer transitions 0/238 dead transitions. [2024-01-27 15:34:40,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 238 transitions, 2840 flow [2024-01-27 15:34:40,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:34:40,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:34:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-01-27 15:34:40,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742857142857143 [2024-01-27 15:34:40,887 INFO L175 Difference]: Start difference. First operand has 92 places, 117 transitions, 1170 flow. Second operand 7 states and 83 transitions. [2024-01-27 15:34:40,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 238 transitions, 2840 flow [2024-01-27 15:34:40,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 238 transitions, 2738 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-01-27 15:34:40,904 INFO L231 Difference]: Finished difference. Result has 99 places, 141 transitions, 1542 flow [2024-01-27 15:34:40,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1542, PETRI_PLACES=99, PETRI_TRANSITIONS=141} [2024-01-27 15:34:40,905 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 73 predicate places. [2024-01-27 15:34:40,905 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 141 transitions, 1542 flow [2024-01-27 15:34:40,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 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) [2024-01-27 15:34:40,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:40,906 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:40,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:41,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:41,116 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:41,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:41,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1329924051, now seen corresponding path program 8 times [2024-01-27 15:34:41,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:41,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611641266] [2024-01-27 15:34:41,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:41,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:41,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:41,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611641266] [2024-01-27 15:34:41,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611641266] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:41,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614685383] [2024-01-27 15:34:41,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:34:41,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:41,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:41,211 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:34:41,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:34:41,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:34:41,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:34:41,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:34:41,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:41,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:41,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614685383] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:41,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:41,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-27 15:34:41,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543187895] [2024-01-27 15:34:41,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:41,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:34:41,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:41,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:34:41,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:34:41,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-27 15:34:41,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 141 transitions, 1542 flow. Second operand has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 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) [2024-01-27 15:34:41,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:41,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-27 15:34:41,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:41,797 INFO L124 PetriNetUnfolderBase]: 803/1556 cut-off events. [2024-01-27 15:34:41,797 INFO L125 PetriNetUnfolderBase]: For 6011/6055 co-relation queries the response was YES. [2024-01-27 15:34:41,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6909 conditions, 1556 events. 803/1556 cut-off events. For 6011/6055 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9253 event pairs, 398 based on Foata normal form. 62/1616 useless extension candidates. Maximal degree in co-relation 5512. Up to 965 conditions per place. [2024-01-27 15:34:41,808 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 112 selfloop transitions, 3 changer transitions 85/203 dead transitions. [2024-01-27 15:34:41,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 203 transitions, 2523 flow [2024-01-27 15:34:41,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:34:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:34:41,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-01-27 15:34:41,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4685714285714286 [2024-01-27 15:34:41,810 INFO L175 Difference]: Start difference. First operand has 99 places, 141 transitions, 1542 flow. Second operand 7 states and 82 transitions. [2024-01-27 15:34:41,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 203 transitions, 2523 flow [2024-01-27 15:34:41,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 203 transitions, 2507 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-01-27 15:34:41,836 INFO L231 Difference]: Finished difference. Result has 106 places, 118 transitions, 1226 flow [2024-01-27 15:34:41,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1226, PETRI_PLACES=106, PETRI_TRANSITIONS=118} [2024-01-27 15:34:41,838 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 80 predicate places. [2024-01-27 15:34:41,838 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 118 transitions, 1226 flow [2024-01-27 15:34:41,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 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) [2024-01-27 15:34:41,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:41,838 INFO L208 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] [2024-01-27 15:34:41,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:42,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-27 15:34:42,052 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:42,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:42,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1518914974, now seen corresponding path program 9 times [2024-01-27 15:34:42,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:42,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150185195] [2024-01-27 15:34:42,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:42,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:34:42,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:42,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150185195] [2024-01-27 15:34:42,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150185195] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:42,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110858060] [2024-01-27 15:34:42,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:34:42,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:42,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:42,146 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:34:42,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:34:42,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:34:42,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:34:42,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:34:42,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:34:42,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:34:42,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110858060] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:42,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:42,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-27 15:34:42,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136844953] [2024-01-27 15:34:42,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:42,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:34:42,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:42,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:34:42,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:34:42,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-27 15:34:42,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 118 transitions, 1226 flow. Second operand has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 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) [2024-01-27 15:34:42,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:42,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-27 15:34:42,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:42,624 INFO L124 PetriNetUnfolderBase]: 528/964 cut-off events. [2024-01-27 15:34:42,650 INFO L125 PetriNetUnfolderBase]: For 3655/3701 co-relation queries the response was YES. [2024-01-27 15:34:42,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4474 conditions, 964 events. 528/964 cut-off events. For 3655/3701 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4753 event pairs, 79 based on Foata normal form. 70/1033 useless extension candidates. Maximal degree in co-relation 4427. Up to 421 conditions per place. [2024-01-27 15:34:42,659 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 111 selfloop transitions, 29 changer transitions 0/143 dead transitions. [2024-01-27 15:34:42,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 143 transitions, 1659 flow [2024-01-27 15:34:42,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:34:42,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:34:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-01-27 15:34:42,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38222222222222224 [2024-01-27 15:34:42,660 INFO L175 Difference]: Start difference. First operand has 106 places, 118 transitions, 1226 flow. Second operand 9 states and 86 transitions. [2024-01-27 15:34:42,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 143 transitions, 1659 flow [2024-01-27 15:34:42,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 143 transitions, 1495 flow, removed 59 selfloop flow, removed 12 redundant places. [2024-01-27 15:34:42,675 INFO L231 Difference]: Finished difference. Result has 98 places, 121 transitions, 1192 flow [2024-01-27 15:34:42,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1192, PETRI_PLACES=98, PETRI_TRANSITIONS=121} [2024-01-27 15:34:42,676 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 72 predicate places. [2024-01-27 15:34:42,677 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 121 transitions, 1192 flow [2024-01-27 15:34:42,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 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) [2024-01-27 15:34:42,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:42,677 INFO L208 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] [2024-01-27 15:34:42,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:42,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-27 15:34:42,891 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:42,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:42,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1877184865, now seen corresponding path program 10 times [2024-01-27 15:34:42,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:42,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960059641] [2024-01-27 15:34:42,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:42,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:42,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:34:42,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:42,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960059641] [2024-01-27 15:34:42,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960059641] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:42,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054415161] [2024-01-27 15:34:42,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:34:42,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:42,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:42,998 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:34:43,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:34:43,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:34:43,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:34:43,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:34:43,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:34:43,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:34:43,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054415161] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:43,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:43,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-27 15:34:43,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949827481] [2024-01-27 15:34:43,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:43,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:34:43,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:43,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:34:43,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:34:43,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-27 15:34:43,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 121 transitions, 1192 flow. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 15 states have internal predecessors, (89), 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) [2024-01-27 15:34:43,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:43,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-27 15:34:43,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:43,513 INFO L124 PetriNetUnfolderBase]: 646/1097 cut-off events. [2024-01-27 15:34:43,514 INFO L125 PetriNetUnfolderBase]: For 3330/3330 co-relation queries the response was YES. [2024-01-27 15:34:43,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4934 conditions, 1097 events. 646/1097 cut-off events. For 3330/3330 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4689 event pairs, 144 based on Foata normal form. 68/1165 useless extension candidates. Maximal degree in co-relation 4879. Up to 435 conditions per place. [2024-01-27 15:34:43,523 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 131 selfloop transitions, 28 changer transitions 0/160 dead transitions. [2024-01-27 15:34:43,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 160 transitions, 1782 flow [2024-01-27 15:34:43,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:34:43,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:34:43,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 81 transitions. [2024-01-27 15:34:43,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36 [2024-01-27 15:34:43,525 INFO L175 Difference]: Start difference. First operand has 98 places, 121 transitions, 1192 flow. Second operand 9 states and 81 transitions. [2024-01-27 15:34:43,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 160 transitions, 1782 flow [2024-01-27 15:34:43,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 160 transitions, 1760 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-01-27 15:34:43,540 INFO L231 Difference]: Finished difference. Result has 103 places, 124 transitions, 1283 flow [2024-01-27 15:34:43,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1283, PETRI_PLACES=103, PETRI_TRANSITIONS=124} [2024-01-27 15:34:43,541 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 77 predicate places. [2024-01-27 15:34:43,541 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 124 transitions, 1283 flow [2024-01-27 15:34:43,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 15 states have internal predecessors, (89), 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) [2024-01-27 15:34:43,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:43,542 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:43,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:43,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:34:43,759 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:43,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:43,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1815258673, now seen corresponding path program 11 times [2024-01-27 15:34:43,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:43,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085811844] [2024-01-27 15:34:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:43,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:44,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:44,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085811844] [2024-01-27 15:34:44,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085811844] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:44,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37951149] [2024-01-27 15:34:44,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:34:44,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:44,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:44,348 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:34:44,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 15:34:44,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:34:44,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:34:44,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:34:44,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:34:44,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:44,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:44,804 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 35 treesize of output 43 [2024-01-27 15:34:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:34:44,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37951149] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:44,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:44,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 27 [2024-01-27 15:34:44,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45374130] [2024-01-27 15:34:44,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:44,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:34:44,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:44,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:34:44,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:34:45,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-27 15:34:45,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 124 transitions, 1283 flow. Second operand has 28 states, 28 states have (on average 6.142857142857143) internal successors, (172), 28 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:45,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:45,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-27 15:34:45,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:46,166 INFO L124 PetriNetUnfolderBase]: 632/1208 cut-off events. [2024-01-27 15:34:46,166 INFO L125 PetriNetUnfolderBase]: For 4062/4066 co-relation queries the response was YES. [2024-01-27 15:34:46,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5575 conditions, 1208 events. 632/1208 cut-off events. For 4062/4066 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6166 event pairs, 21 based on Foata normal form. 5/1213 useless extension candidates. Maximal degree in co-relation 5518. Up to 661 conditions per place. [2024-01-27 15:34:46,177 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 154 selfloop transitions, 80 changer transitions 1/239 dead transitions. [2024-01-27 15:34:46,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 239 transitions, 2372 flow [2024-01-27 15:34:46,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 15:34:46,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 15:34:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 258 transitions. [2024-01-27 15:34:46,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39692307692307693 [2024-01-27 15:34:46,180 INFO L175 Difference]: Start difference. First operand has 103 places, 124 transitions, 1283 flow. Second operand 26 states and 258 transitions. [2024-01-27 15:34:46,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 239 transitions, 2372 flow [2024-01-27 15:34:46,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 239 transitions, 2365 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:34:46,199 INFO L231 Difference]: Finished difference. Result has 130 places, 160 transitions, 1793 flow [2024-01-27 15:34:46,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1793, PETRI_PLACES=130, PETRI_TRANSITIONS=160} [2024-01-27 15:34:46,200 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 104 predicate places. [2024-01-27 15:34:46,200 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 160 transitions, 1793 flow [2024-01-27 15:34:46,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.142857142857143) internal successors, (172), 28 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:46,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:46,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:46,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:46,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:34:46,401 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:46,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:46,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1092200439, now seen corresponding path program 12 times [2024-01-27 15:34:46,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:46,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235646685] [2024-01-27 15:34:46,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:46,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:47,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:47,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235646685] [2024-01-27 15:34:47,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235646685] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:47,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915385001] [2024-01-27 15:34:47,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:34:47,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:47,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:47,187 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:34:47,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:34:47,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:34:47,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:34:47,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:34:47,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:47,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:47,658 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:47,659 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 35 treesize of output 43 [2024-01-27 15:34:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:34:47,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915385001] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:47,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:47,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 30 [2024-01-27 15:34:47,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438252667] [2024-01-27 15:34:47,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:47,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:34:47,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:47,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:34:47,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:34:47,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-27 15:34:47,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 160 transitions, 1793 flow. Second operand has 31 states, 31 states have (on average 6.129032258064516) internal successors, (190), 31 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:47,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:47,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-27 15:34:47,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:48,813 INFO L124 PetriNetUnfolderBase]: 809/1535 cut-off events. [2024-01-27 15:34:48,814 INFO L125 PetriNetUnfolderBase]: For 6871/6871 co-relation queries the response was YES. [2024-01-27 15:34:48,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7774 conditions, 1535 events. 809/1535 cut-off events. For 6871/6871 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8431 event pairs, 89 based on Foata normal form. 1/1534 useless extension candidates. Maximal degree in co-relation 7710. Up to 940 conditions per place. [2024-01-27 15:34:48,838 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 153 selfloop transitions, 84 changer transitions 1/242 dead transitions. [2024-01-27 15:34:48,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 242 transitions, 2802 flow [2024-01-27 15:34:48,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:34:48,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:34:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 201 transitions. [2024-01-27 15:34:48,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38285714285714284 [2024-01-27 15:34:48,841 INFO L175 Difference]: Start difference. First operand has 130 places, 160 transitions, 1793 flow. Second operand 21 states and 201 transitions. [2024-01-27 15:34:48,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 242 transitions, 2802 flow [2024-01-27 15:34:48,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 242 transitions, 2604 flow, removed 65 selfloop flow, removed 11 redundant places. [2024-01-27 15:34:48,868 INFO L231 Difference]: Finished difference. Result has 146 places, 189 transitions, 2154 flow [2024-01-27 15:34:48,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2154, PETRI_PLACES=146, PETRI_TRANSITIONS=189} [2024-01-27 15:34:48,869 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 120 predicate places. [2024-01-27 15:34:48,869 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 189 transitions, 2154 flow [2024-01-27 15:34:48,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.129032258064516) internal successors, (190), 31 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:48,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:48,870 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:48,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:49,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:49,085 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:49,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:49,085 INFO L85 PathProgramCache]: Analyzing trace with hash -511927173, now seen corresponding path program 13 times [2024-01-27 15:34:49,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:49,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560422420] [2024-01-27 15:34:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:49,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:49,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:49,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560422420] [2024-01-27 15:34:49,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560422420] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:49,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114333707] [2024-01-27 15:34:49,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:34:49,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:49,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:49,650 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:34:49,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:34:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:49,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:34:49,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:34:49,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:50,060 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:50,060 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 35 treesize of output 43 [2024-01-27 15:34:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:34:50,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114333707] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:50,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:50,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-01-27 15:34:50,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012924997] [2024-01-27 15:34:50,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:50,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:34:50,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:50,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:34:50,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:34:50,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-27 15:34:50,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 189 transitions, 2154 flow. Second operand has 29 states, 29 states have (on average 5.931034482758621) internal successors, (172), 29 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:50,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:50,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-27 15:34:50,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:51,233 INFO L124 PetriNetUnfolderBase]: 1001/1828 cut-off events. [2024-01-27 15:34:51,233 INFO L125 PetriNetUnfolderBase]: For 9311/9313 co-relation queries the response was YES. [2024-01-27 15:34:51,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9579 conditions, 1828 events. 1001/1828 cut-off events. For 9311/9313 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9979 event pairs, 166 based on Foata normal form. 1/1821 useless extension candidates. Maximal degree in co-relation 9508. Up to 1442 conditions per place. [2024-01-27 15:34:51,248 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 181 selfloop transitions, 66 changer transitions 1/256 dead transitions. [2024-01-27 15:34:51,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 256 transitions, 3095 flow [2024-01-27 15:34:51,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:34:51,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:34:51,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 187 transitions. [2024-01-27 15:34:51,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35619047619047617 [2024-01-27 15:34:51,250 INFO L175 Difference]: Start difference. First operand has 146 places, 189 transitions, 2154 flow. Second operand 21 states and 187 transitions. [2024-01-27 15:34:51,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 256 transitions, 3095 flow [2024-01-27 15:34:51,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 256 transitions, 3041 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-01-27 15:34:51,284 INFO L231 Difference]: Finished difference. Result has 164 places, 211 transitions, 2563 flow [2024-01-27 15:34:51,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2102, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2563, PETRI_PLACES=164, PETRI_TRANSITIONS=211} [2024-01-27 15:34:51,285 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 138 predicate places. [2024-01-27 15:34:51,285 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 211 transitions, 2563 flow [2024-01-27 15:34:51,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.931034482758621) internal successors, (172), 29 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:51,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:51,286 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:51,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:51,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-27 15:34:51,500 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:51,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:51,501 INFO L85 PathProgramCache]: Analyzing trace with hash -854612301, now seen corresponding path program 14 times [2024-01-27 15:34:51,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:51,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581417478] [2024-01-27 15:34:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:51,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:52,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:52,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581417478] [2024-01-27 15:34:52,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581417478] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:52,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84081715] [2024-01-27 15:34:52,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:34:52,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:52,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:52,044 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:34:52,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:34:52,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:34:52,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:34:52,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 47 conjunts are in the unsatisfiable core [2024-01-27 15:34:52,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:52,229 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 15 treesize of output 1 [2024-01-27 15:34:52,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:52,486 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 15 treesize of output 14 [2024-01-27 15:34:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:52,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:53,142 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 33 treesize of output 29 [2024-01-27 15:34:53,151 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:53,151 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 68 treesize of output 56 [2024-01-27 15:34:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:53,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84081715] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:53,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:53,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2024-01-27 15:34:53,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542988697] [2024-01-27 15:34:53,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:53,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-01-27 15:34:53,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:53,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-01-27 15:34:53,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1292, Unknown=0, NotChecked=0, Total=1482 [2024-01-27 15:34:53,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-27 15:34:53,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 211 transitions, 2563 flow. Second operand has 39 states, 39 states have (on average 5.641025641025641) internal successors, (220), 39 states have internal predecessors, (220), 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) [2024-01-27 15:34:53,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:53,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-27 15:34:53,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:55,373 INFO L124 PetriNetUnfolderBase]: 1319/2422 cut-off events. [2024-01-27 15:34:55,373 INFO L125 PetriNetUnfolderBase]: For 16218/16220 co-relation queries the response was YES. [2024-01-27 15:34:55,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13609 conditions, 2422 events. 1319/2422 cut-off events. For 16218/16220 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14337 event pairs, 105 based on Foata normal form. 2/2420 useless extension candidates. Maximal degree in co-relation 13529. Up to 1156 conditions per place. [2024-01-27 15:34:55,390 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 184 selfloop transitions, 190 changer transitions 8/390 dead transitions. [2024-01-27 15:34:55,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 390 transitions, 4765 flow [2024-01-27 15:34:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-27 15:34:55,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-27 15:34:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 349 transitions. [2024-01-27 15:34:55,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772972972972973 [2024-01-27 15:34:55,392 INFO L175 Difference]: Start difference. First operand has 164 places, 211 transitions, 2563 flow. Second operand 37 states and 349 transitions. [2024-01-27 15:34:55,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 390 transitions, 4765 flow [2024-01-27 15:34:55,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 390 transitions, 4609 flow, removed 47 selfloop flow, removed 10 redundant places. [2024-01-27 15:34:55,450 INFO L231 Difference]: Finished difference. Result has 200 places, 278 transitions, 3898 flow [2024-01-27 15:34:55,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2433, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3898, PETRI_PLACES=200, PETRI_TRANSITIONS=278} [2024-01-27 15:34:55,450 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 174 predicate places. [2024-01-27 15:34:55,450 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 278 transitions, 3898 flow [2024-01-27 15:34:55,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.641025641025641) internal successors, (220), 39 states have internal predecessors, (220), 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) [2024-01-27 15:34:55,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:55,451 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:55,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-01-27 15:34:55,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:55,664 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:55,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:55,665 INFO L85 PathProgramCache]: Analyzing trace with hash 192553071, now seen corresponding path program 15 times [2024-01-27 15:34:55,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:55,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315564154] [2024-01-27 15:34:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:55,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:56,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:56,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315564154] [2024-01-27 15:34:56,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315564154] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:56,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844411014] [2024-01-27 15:34:56,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:34:56,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:56,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:56,380 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:34:56,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-27 15:34:56,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:34:56,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:34:56,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-27 15:34:56,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:56,539 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 15 treesize of output 1 [2024-01-27 15:34:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:56,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:57,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:34:57,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844411014] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:57,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:57,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 9] total 33 [2024-01-27 15:34:57,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606445033] [2024-01-27 15:34:57,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:57,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:34:57,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:57,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:34:57,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:34:57,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-27 15:34:57,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 278 transitions, 3898 flow. Second operand has 34 states, 34 states have (on average 5.029411764705882) internal successors, (171), 34 states have internal predecessors, (171), 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) [2024-01-27 15:34:57,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:57,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-27 15:34:57,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:58,762 INFO L124 PetriNetUnfolderBase]: 1952/3334 cut-off events. [2024-01-27 15:34:58,762 INFO L125 PetriNetUnfolderBase]: For 32272/32272 co-relation queries the response was YES. [2024-01-27 15:34:58,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21027 conditions, 3334 events. 1952/3334 cut-off events. For 32272/32272 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18840 event pairs, 208 based on Foata normal form. 1/3335 useless extension candidates. Maximal degree in co-relation 20937. Up to 2069 conditions per place. [2024-01-27 15:34:58,789 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 234 selfloop transitions, 167 changer transitions 1/403 dead transitions. [2024-01-27 15:34:58,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 403 transitions, 5944 flow [2024-01-27 15:34:58,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:34:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:34:58,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 212 transitions. [2024-01-27 15:34:58,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38545454545454544 [2024-01-27 15:34:58,791 INFO L175 Difference]: Start difference. First operand has 200 places, 278 transitions, 3898 flow. Second operand 22 states and 212 transitions. [2024-01-27 15:34:58,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 403 transitions, 5944 flow [2024-01-27 15:34:58,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 403 transitions, 5370 flow, removed 192 selfloop flow, removed 18 redundant places. [2024-01-27 15:34:58,901 INFO L231 Difference]: Finished difference. Result has 210 places, 319 transitions, 4569 flow [2024-01-27 15:34:58,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3473, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4569, PETRI_PLACES=210, PETRI_TRANSITIONS=319} [2024-01-27 15:34:58,902 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 184 predicate places. [2024-01-27 15:34:58,902 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 319 transitions, 4569 flow [2024-01-27 15:34:58,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.029411764705882) internal successors, (171), 34 states have internal predecessors, (171), 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) [2024-01-27 15:34:58,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:58,902 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:58,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:59,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:59,117 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:59,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:59,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1626230287, now seen corresponding path program 16 times [2024-01-27 15:34:59,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:59,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362304131] [2024-01-27 15:34:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:59,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:59,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:59,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362304131] [2024-01-27 15:34:59,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362304131] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:59,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668632111] [2024-01-27 15:34:59,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:34:59,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:59,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:59,693 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:34:59,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-27 15:34:59,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:34:59,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:34:59,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:34:59,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:34:59,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:00,112 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:00,113 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 35 treesize of output 43 [2024-01-27 15:35:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:00,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668632111] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:00,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:00,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-01-27 15:35:00,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063760672] [2024-01-27 15:35:00,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:00,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:35:00,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:00,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:35:00,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:35:00,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-27 15:35:00,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 319 transitions, 4569 flow. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 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) [2024-01-27 15:35:00,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:00,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-27 15:35:00,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:01,704 INFO L124 PetriNetUnfolderBase]: 2253/3832 cut-off events. [2024-01-27 15:35:01,704 INFO L125 PetriNetUnfolderBase]: For 37837/37837 co-relation queries the response was YES. [2024-01-27 15:35:01,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24981 conditions, 3832 events. 2253/3832 cut-off events. For 37837/37837 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 22141 event pairs, 268 based on Foata normal form. 1/3833 useless extension candidates. Maximal degree in co-relation 24884. Up to 2310 conditions per place. [2024-01-27 15:35:01,748 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 272 selfloop transitions, 218 changer transitions 1/492 dead transitions. [2024-01-27 15:35:01,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 492 transitions, 7275 flow [2024-01-27 15:35:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-27 15:35:01,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-27 15:35:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 283 transitions. [2024-01-27 15:35:01,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35375 [2024-01-27 15:35:01,750 INFO L175 Difference]: Start difference. First operand has 210 places, 319 transitions, 4569 flow. Second operand 32 states and 283 transitions. [2024-01-27 15:35:01,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 492 transitions, 7275 flow [2024-01-27 15:35:01,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 492 transitions, 7200 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-01-27 15:35:01,890 INFO L231 Difference]: Finished difference. Result has 247 places, 391 transitions, 6320 flow [2024-01-27 15:35:01,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=4506, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=6320, PETRI_PLACES=247, PETRI_TRANSITIONS=391} [2024-01-27 15:35:01,891 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 221 predicate places. [2024-01-27 15:35:01,891 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 391 transitions, 6320 flow [2024-01-27 15:35:01,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 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) [2024-01-27 15:35:01,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:01,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:01,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:02,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:02,095 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:02,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:02,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1712987867, now seen corresponding path program 17 times [2024-01-27 15:35:02,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:02,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031049025] [2024-01-27 15:35:02,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:02,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:02,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:02,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031049025] [2024-01-27 15:35:02,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031049025] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:02,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915158737] [2024-01-27 15:35:02,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:35:02,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:02,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:02,731 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:02,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-27 15:35:02,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:35:02,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:02,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:35:02,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:03,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:03,177 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:03,178 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 35 treesize of output 43 [2024-01-27 15:35:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:03,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915158737] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:03,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:03,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-01-27 15:35:03,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922687759] [2024-01-27 15:35:03,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:03,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:35:03,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:03,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:35:03,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:35:03,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-27 15:35:03,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 391 transitions, 6320 flow. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 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) [2024-01-27 15:35:03,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:03,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-27 15:35:03,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:05,045 INFO L124 PetriNetUnfolderBase]: 2500/4240 cut-off events. [2024-01-27 15:35:05,045 INFO L125 PetriNetUnfolderBase]: For 51887/51887 co-relation queries the response was YES. [2024-01-27 15:35:05,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30511 conditions, 4240 events. 2500/4240 cut-off events. For 51887/51887 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 24849 event pairs, 292 based on Foata normal form. 1/4241 useless extension candidates. Maximal degree in co-relation 30401. Up to 2553 conditions per place. [2024-01-27 15:35:05,086 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 299 selfloop transitions, 234 changer transitions 1/535 dead transitions. [2024-01-27 15:35:05,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 535 transitions, 8898 flow [2024-01-27 15:35:05,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-27 15:35:05,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-27 15:35:05,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 262 transitions. [2024-01-27 15:35:05,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34933333333333333 [2024-01-27 15:35:05,088 INFO L175 Difference]: Start difference. First operand has 247 places, 391 transitions, 6320 flow. Second operand 30 states and 262 transitions. [2024-01-27 15:35:05,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 535 transitions, 8898 flow [2024-01-27 15:35:05,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 535 transitions, 8617 flow, removed 87 selfloop flow, removed 15 redundant places. [2024-01-27 15:35:05,300 INFO L231 Difference]: Finished difference. Result has 274 places, 433 transitions, 7612 flow [2024-01-27 15:35:05,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6043, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=7612, PETRI_PLACES=274, PETRI_TRANSITIONS=433} [2024-01-27 15:35:05,301 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 248 predicate places. [2024-01-27 15:35:05,301 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 433 transitions, 7612 flow [2024-01-27 15:35:05,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 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) [2024-01-27 15:35:05,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:05,302 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:05,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:05,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:05,503 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:05,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:05,504 INFO L85 PathProgramCache]: Analyzing trace with hash -832652345, now seen corresponding path program 18 times [2024-01-27 15:35:05,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:05,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777028918] [2024-01-27 15:35:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:05,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:06,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:06,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777028918] [2024-01-27 15:35:06,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777028918] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:06,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502784309] [2024-01-27 15:35:06,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:35:06,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:06,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:06,046 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:06,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-27 15:35:06,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:35:06,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:06,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-27 15:35:06,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:06,204 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 15 treesize of output 1 [2024-01-27 15:35:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:06,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:06,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502784309] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:06,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:06,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 9] total 33 [2024-01-27 15:35:06,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991884260] [2024-01-27 15:35:06,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:06,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:35:06,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:06,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:35:06,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:35:06,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-27 15:35:06,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 433 transitions, 7612 flow. Second operand has 34 states, 34 states have (on average 5.029411764705882) internal successors, (171), 34 states have internal predecessors, (171), 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) [2024-01-27 15:35:06,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:06,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-27 15:35:06,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:08,352 INFO L124 PetriNetUnfolderBase]: 2725/4613 cut-off events. [2024-01-27 15:35:08,353 INFO L125 PetriNetUnfolderBase]: For 69577/69577 co-relation queries the response was YES. [2024-01-27 15:35:08,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36111 conditions, 4613 events. 2725/4613 cut-off events. For 69577/69577 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 27187 event pairs, 326 based on Foata normal form. 2/4615 useless extension candidates. Maximal degree in co-relation 35990. Up to 3072 conditions per place. [2024-01-27 15:35:08,388 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 349 selfloop transitions, 242 changer transitions 2/594 dead transitions. [2024-01-27 15:35:08,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 594 transitions, 10886 flow [2024-01-27 15:35:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-27 15:35:08,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-27 15:35:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 267 transitions. [2024-01-27 15:35:08,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3445161290322581 [2024-01-27 15:35:08,392 INFO L175 Difference]: Start difference. First operand has 274 places, 433 transitions, 7612 flow. Second operand 31 states and 267 transitions. [2024-01-27 15:35:08,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 594 transitions, 10886 flow [2024-01-27 15:35:08,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 594 transitions, 10637 flow, removed 80 selfloop flow, removed 15 redundant places. [2024-01-27 15:35:08,695 INFO L231 Difference]: Finished difference. Result has 300 places, 487 transitions, 9465 flow [2024-01-27 15:35:08,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7367, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=9465, PETRI_PLACES=300, PETRI_TRANSITIONS=487} [2024-01-27 15:35:08,696 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 274 predicate places. [2024-01-27 15:35:08,696 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 487 transitions, 9465 flow [2024-01-27 15:35:08,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.029411764705882) internal successors, (171), 34 states have internal predecessors, (171), 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) [2024-01-27 15:35:08,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:08,696 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:08,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:08,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-01-27 15:35:08,904 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:08,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:08,905 INFO L85 PathProgramCache]: Analyzing trace with hash 141675485, now seen corresponding path program 19 times [2024-01-27 15:35:08,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:08,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204493835] [2024-01-27 15:35:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:08,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:09,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:09,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204493835] [2024-01-27 15:35:09,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204493835] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:09,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413185970] [2024-01-27 15:35:09,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:35:09,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:09,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:09,515 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:09,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-27 15:35:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:09,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:35:09,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:09,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:09,958 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:09,958 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 35 treesize of output 43 [2024-01-27 15:35:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:09,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413185970] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:09,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:09,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-01-27 15:35:09,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812261425] [2024-01-27 15:35:09,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:09,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:35:09,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:09,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:35:09,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:35:10,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-27 15:35:10,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 487 transitions, 9465 flow. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 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) [2024-01-27 15:35:10,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:10,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-27 15:35:10,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:11,989 INFO L124 PetriNetUnfolderBase]: 2881/4882 cut-off events. [2024-01-27 15:35:11,989 INFO L125 PetriNetUnfolderBase]: For 87257/87257 co-relation queries the response was YES. [2024-01-27 15:35:12,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41328 conditions, 4882 events. 2881/4882 cut-off events. For 87257/87257 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 29221 event pairs, 362 based on Foata normal form. 1/4883 useless extension candidates. Maximal degree in co-relation 41196. Up to 3341 conditions per place. [2024-01-27 15:35:12,030 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 363 selfloop transitions, 236 changer transitions 1/601 dead transitions. [2024-01-27 15:35:12,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 601 transitions, 12161 flow [2024-01-27 15:35:12,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:35:12,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:35:12,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 191 transitions. [2024-01-27 15:35:12,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.382 [2024-01-27 15:35:12,031 INFO L175 Difference]: Start difference. First operand has 300 places, 487 transitions, 9465 flow. Second operand 20 states and 191 transitions. [2024-01-27 15:35:12,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 601 transitions, 12161 flow [2024-01-27 15:35:12,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 601 transitions, 11698 flow, removed 194 selfloop flow, removed 13 redundant places. [2024-01-27 15:35:12,490 INFO L231 Difference]: Finished difference. Result has 313 places, 510 transitions, 10482 flow [2024-01-27 15:35:12,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=9060, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=10482, PETRI_PLACES=313, PETRI_TRANSITIONS=510} [2024-01-27 15:35:12,491 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 287 predicate places. [2024-01-27 15:35:12,491 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 510 transitions, 10482 flow [2024-01-27 15:35:12,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 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) [2024-01-27 15:35:12,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:12,492 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:12,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-01-27 15:35:12,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-01-27 15:35:12,693 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:12,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:12,693 INFO L85 PathProgramCache]: Analyzing trace with hash 639225855, now seen corresponding path program 20 times [2024-01-27 15:35:12,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:12,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680732821] [2024-01-27 15:35:12,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:12,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:13,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:13,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:13,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680732821] [2024-01-27 15:35:13,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680732821] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:13,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876507341] [2024-01-27 15:35:13,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:35:13,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:13,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:13,205 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:13,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-27 15:35:13,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:35:13,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:13,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:35:13,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:35:13,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:13,695 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:13,696 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 35 treesize of output 43 [2024-01-27 15:35:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:13,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876507341] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:13,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:13,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 32 [2024-01-27 15:35:13,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288031910] [2024-01-27 15:35:13,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:13,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-27 15:35:13,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:13,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-27 15:35:13,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2024-01-27 15:35:13,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-27 15:35:13,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 510 transitions, 10482 flow. Second operand has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 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) [2024-01-27 15:35:13,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:13,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-27 15:35:13,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:15,814 INFO L124 PetriNetUnfolderBase]: 2978/5048 cut-off events. [2024-01-27 15:35:15,814 INFO L125 PetriNetUnfolderBase]: For 101015/101015 co-relation queries the response was YES. [2024-01-27 15:35:15,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44649 conditions, 5048 events. 2978/5048 cut-off events. For 101015/101015 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 30422 event pairs, 410 based on Foata normal form. 1/5049 useless extension candidates. Maximal degree in co-relation 44509. Up to 3552 conditions per place. [2024-01-27 15:35:15,864 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 369 selfloop transitions, 243 changer transitions 1/614 dead transitions. [2024-01-27 15:35:15,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 614 transitions, 12937 flow [2024-01-27 15:35:15,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:35:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:35:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 224 transitions. [2024-01-27 15:35:15,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33185185185185184 [2024-01-27 15:35:15,866 INFO L175 Difference]: Start difference. First operand has 313 places, 510 transitions, 10482 flow. Second operand 27 states and 224 transitions. [2024-01-27 15:35:15,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 614 transitions, 12937 flow [2024-01-27 15:35:16,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 614 transitions, 12823 flow, removed 25 selfloop flow, removed 11 redundant places. [2024-01-27 15:35:16,352 INFO L231 Difference]: Finished difference. Result has 332 places, 524 transitions, 11278 flow [2024-01-27 15:35:16,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=10368, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11278, PETRI_PLACES=332, PETRI_TRANSITIONS=524} [2024-01-27 15:35:16,353 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 306 predicate places. [2024-01-27 15:35:16,353 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 524 transitions, 11278 flow [2024-01-27 15:35:16,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 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) [2024-01-27 15:35:16,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:16,354 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:16,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-01-27 15:35:16,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:16,557 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:16,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:16,557 INFO L85 PathProgramCache]: Analyzing trace with hash -313498165, now seen corresponding path program 21 times [2024-01-27 15:35:16,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:16,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465655393] [2024-01-27 15:35:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:16,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:17,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:17,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465655393] [2024-01-27 15:35:17,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465655393] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:17,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962060825] [2024-01-27 15:35:17,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:35:17,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:17,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:17,084 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:17,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-27 15:35:17,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:35:17,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:17,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:35:17,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:35:17,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:17,559 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:17,559 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 35 treesize of output 43 [2024-01-27 15:35:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:17,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962060825] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:17,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:17,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 32 [2024-01-27 15:35:17,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870011243] [2024-01-27 15:35:17,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:17,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-27 15:35:17,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:17,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-27 15:35:17,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2024-01-27 15:35:17,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-27 15:35:17,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 524 transitions, 11278 flow. Second operand has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 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) [2024-01-27 15:35:17,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:17,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-27 15:35:17,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:19,608 INFO L124 PetriNetUnfolderBase]: 3073/5212 cut-off events. [2024-01-27 15:35:19,608 INFO L125 PetriNetUnfolderBase]: For 111941/111941 co-relation queries the response was YES. [2024-01-27 15:35:19,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47605 conditions, 5212 events. 3073/5212 cut-off events. For 111941/111941 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 31687 event pairs, 404 based on Foata normal form. 1/5213 useless extension candidates. Maximal degree in co-relation 47460. Up to 3581 conditions per place. [2024-01-27 15:35:19,673 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 375 selfloop transitions, 256 changer transitions 1/633 dead transitions. [2024-01-27 15:35:19,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 633 transitions, 13932 flow [2024-01-27 15:35:19,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:35:19,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:35:19,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 194 transitions. [2024-01-27 15:35:19,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36952380952380953 [2024-01-27 15:35:19,675 INFO L175 Difference]: Start difference. First operand has 332 places, 524 transitions, 11278 flow. Second operand 21 states and 194 transitions. [2024-01-27 15:35:19,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 633 transitions, 13932 flow [2024-01-27 15:35:20,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 633 transitions, 13740 flow, removed 52 selfloop flow, removed 15 redundant places. [2024-01-27 15:35:20,163 INFO L231 Difference]: Finished difference. Result has 343 places, 541 transitions, 12339 flow [2024-01-27 15:35:20,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=11088, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=12339, PETRI_PLACES=343, PETRI_TRANSITIONS=541} [2024-01-27 15:35:20,164 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 317 predicate places. [2024-01-27 15:35:20,164 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 541 transitions, 12339 flow [2024-01-27 15:35:20,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 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) [2024-01-27 15:35:20,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:20,165 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:20,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:20,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:20,366 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:20,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:20,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1690706121, now seen corresponding path program 22 times [2024-01-27 15:35:20,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:20,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831388492] [2024-01-27 15:35:20,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:20,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:21,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:21,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831388492] [2024-01-27 15:35:21,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831388492] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:21,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523608471] [2024-01-27 15:35:21,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:35:21,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:21,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:21,048 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:21,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-27 15:35:21,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:35:21,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:21,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:35:21,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:21,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:21,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:21,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-27 15:35:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:21,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523608471] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:21,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:21,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-01-27 15:35:21,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144652466] [2024-01-27 15:35:21,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:21,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:35:21,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:21,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:35:21,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:35:21,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-27 15:35:21,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 541 transitions, 12339 flow. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 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) [2024-01-27 15:35:21,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:21,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-27 15:35:21,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:24,146 INFO L124 PetriNetUnfolderBase]: 3402/5759 cut-off events. [2024-01-27 15:35:24,146 INFO L125 PetriNetUnfolderBase]: For 138902/138902 co-relation queries the response was YES. [2024-01-27 15:35:24,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54705 conditions, 5759 events. 3402/5759 cut-off events. For 138902/138902 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 35566 event pairs, 428 based on Foata normal form. 1/5760 useless extension candidates. Maximal degree in co-relation 54553. Up to 3734 conditions per place. [2024-01-27 15:35:24,201 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 392 selfloop transitions, 311 changer transitions 1/705 dead transitions. [2024-01-27 15:35:24,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 705 transitions, 16303 flow [2024-01-27 15:35:24,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 15:35:24,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 15:35:24,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 255 transitions. [2024-01-27 15:35:24,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35172413793103446 [2024-01-27 15:35:24,202 INFO L175 Difference]: Start difference. First operand has 343 places, 541 transitions, 12339 flow. Second operand 29 states and 255 transitions. [2024-01-27 15:35:24,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 705 transitions, 16303 flow [2024-01-27 15:35:24,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 705 transitions, 16091 flow, removed 52 selfloop flow, removed 14 redundant places. [2024-01-27 15:35:24,741 INFO L231 Difference]: Finished difference. Result has 370 places, 599 transitions, 14801 flow [2024-01-27 15:35:24,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=12158, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=14801, PETRI_PLACES=370, PETRI_TRANSITIONS=599} [2024-01-27 15:35:24,742 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 344 predicate places. [2024-01-27 15:35:24,742 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 599 transitions, 14801 flow [2024-01-27 15:35:24,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 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) [2024-01-27 15:35:24,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:24,742 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:24,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:24,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-27 15:35:24,943 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:24,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:24,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1407187819, now seen corresponding path program 23 times [2024-01-27 15:35:24,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:24,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808435872] [2024-01-27 15:35:24,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:24,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:25,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:25,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808435872] [2024-01-27 15:35:25,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808435872] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:25,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701414916] [2024-01-27 15:35:25,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:35:25,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:25,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:25,534 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:25,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-27 15:35:25,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:35:25,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:25,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:35:25,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:25,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:25,919 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:25,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-27 15:35:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:26,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701414916] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:26,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:26,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-01-27 15:35:26,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175562897] [2024-01-27 15:35:26,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:26,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:35:26,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:26,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:35:26,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:35:26,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-27 15:35:26,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 599 transitions, 14801 flow. Second operand has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 29 states have internal predecessors, (148), 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) [2024-01-27 15:35:26,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:26,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-27 15:35:26,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:28,737 INFO L124 PetriNetUnfolderBase]: 3614/6104 cut-off events. [2024-01-27 15:35:28,738 INFO L125 PetriNetUnfolderBase]: For 192697/192697 co-relation queries the response was YES. [2024-01-27 15:35:28,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62743 conditions, 6104 events. 3614/6104 cut-off events. For 192697/192697 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 37804 event pairs, 730 based on Foata normal form. 1/6105 useless extension candidates. Maximal degree in co-relation 62578. Up to 5577 conditions per place. [2024-01-27 15:35:28,805 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 613 selfloop transitions, 101 changer transitions 1/716 dead transitions. [2024-01-27 15:35:28,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 716 transitions, 18380 flow [2024-01-27 15:35:28,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-27 15:35:28,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-27 15:35:28,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 247 transitions. [2024-01-27 15:35:28,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3293333333333333 [2024-01-27 15:35:28,806 INFO L175 Difference]: Start difference. First operand has 370 places, 599 transitions, 14801 flow. Second operand 30 states and 247 transitions. [2024-01-27 15:35:28,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 716 transitions, 18380 flow [2024-01-27 15:35:29,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 716 transitions, 17977 flow, removed 126 selfloop flow, removed 20 redundant places. [2024-01-27 15:35:29,626 INFO L231 Difference]: Finished difference. Result has 390 places, 648 transitions, 16184 flow [2024-01-27 15:35:29,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=14404, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=16184, PETRI_PLACES=390, PETRI_TRANSITIONS=648} [2024-01-27 15:35:29,628 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 364 predicate places. [2024-01-27 15:35:29,628 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 648 transitions, 16184 flow [2024-01-27 15:35:29,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 29 states have internal predecessors, (148), 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) [2024-01-27 15:35:29,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:29,628 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:29,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:29,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-27 15:35:29,836 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:29,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:29,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1406130979, now seen corresponding path program 24 times [2024-01-27 15:35:29,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:29,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139645910] [2024-01-27 15:35:29,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:29,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:30,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:30,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139645910] [2024-01-27 15:35:30,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139645910] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:30,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210883794] [2024-01-27 15:35:30,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:35:30,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:30,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:30,496 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:30,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-27 15:35:30,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:35:30,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:30,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-27 15:35:30,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:30,643 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 15 treesize of output 1 [2024-01-27 15:35:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:30,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:30,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210883794] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:30,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:30,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 9] total 31 [2024-01-27 15:35:30,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415748766] [2024-01-27 15:35:30,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:30,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-27 15:35:30,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:31,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-27 15:35:31,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2024-01-27 15:35:31,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-27 15:35:31,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 648 transitions, 16184 flow. Second operand has 32 states, 32 states have (on average 5.125) internal successors, (164), 32 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:31,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:31,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-27 15:35:31,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:34,096 INFO L124 PetriNetUnfolderBase]: 3884/6558 cut-off events. [2024-01-27 15:35:34,097 INFO L125 PetriNetUnfolderBase]: For 227107/227107 co-relation queries the response was YES. [2024-01-27 15:35:34,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70419 conditions, 6558 events. 3884/6558 cut-off events. For 227107/227107 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 40895 event pairs, 774 based on Foata normal form. 2/6560 useless extension candidates. Maximal degree in co-relation 70247. Up to 5894 conditions per place. [2024-01-27 15:35:34,164 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 652 selfloop transitions, 125 changer transitions 2/780 dead transitions. [2024-01-27 15:35:34,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 780 transitions, 20337 flow [2024-01-27 15:35:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-27 15:35:34,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-27 15:35:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 283 transitions. [2024-01-27 15:35:34,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35375 [2024-01-27 15:35:34,166 INFO L175 Difference]: Start difference. First operand has 390 places, 648 transitions, 16184 flow. Second operand 32 states and 283 transitions. [2024-01-27 15:35:34,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 780 transitions, 20337 flow [2024-01-27 15:35:35,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 780 transitions, 19680 flow, removed 291 selfloop flow, removed 12 redundant places. [2024-01-27 15:35:35,171 INFO L231 Difference]: Finished difference. Result has 417 places, 692 transitions, 17492 flow [2024-01-27 15:35:35,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=15567, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=17492, PETRI_PLACES=417, PETRI_TRANSITIONS=692} [2024-01-27 15:35:35,172 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 391 predicate places. [2024-01-27 15:35:35,172 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 692 transitions, 17492 flow [2024-01-27 15:35:35,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.125) internal successors, (164), 32 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:35,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:35,173 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:35,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:35,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-27 15:35:35,376 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:35,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:35,376 INFO L85 PathProgramCache]: Analyzing trace with hash -648305729, now seen corresponding path program 25 times [2024-01-27 15:35:35,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:35,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463005133] [2024-01-27 15:35:35,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:35,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:35,915 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:35,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:35,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463005133] [2024-01-27 15:35:35,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463005133] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:35,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420645095] [2024-01-27 15:35:35,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:35:35,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:35,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:35,917 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:35,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-27 15:35:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:36,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:35:36,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:36,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:36,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:36,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-27 15:35:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:36,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420645095] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:36,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:36,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-01-27 15:35:36,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998649476] [2024-01-27 15:35:36,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:36,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:35:36,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:36,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:35:36,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:35:36,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-27 15:35:36,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 692 transitions, 17492 flow. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 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) [2024-01-27 15:35:36,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:36,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-27 15:35:36,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:40,313 INFO L124 PetriNetUnfolderBase]: 4821/8123 cut-off events. [2024-01-27 15:35:40,313 INFO L125 PetriNetUnfolderBase]: For 344946/344946 co-relation queries the response was YES. [2024-01-27 15:35:40,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88750 conditions, 8123 events. 4821/8123 cut-off events. For 344946/344946 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 53621 event pairs, 462 based on Foata normal form. 1/8124 useless extension candidates. Maximal degree in co-relation 88571. Up to 5454 conditions per place. [2024-01-27 15:35:40,404 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 695 selfloop transitions, 519 changer transitions 1/1216 dead transitions. [2024-01-27 15:35:40,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1216 transitions, 32469 flow [2024-01-27 15:35:40,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-27 15:35:40,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-27 15:35:40,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 324 transitions. [2024-01-27 15:35:40,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3410526315789474 [2024-01-27 15:35:40,407 INFO L175 Difference]: Start difference. First operand has 417 places, 692 transitions, 17492 flow. Second operand 38 states and 324 transitions. [2024-01-27 15:35:40,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1216 transitions, 32469 flow [2024-01-27 15:35:41,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 1216 transitions, 31829 flow, removed 282 selfloop flow, removed 15 redundant places. [2024-01-27 15:35:41,810 INFO L231 Difference]: Finished difference. Result has 457 places, 997 transitions, 27425 flow [2024-01-27 15:35:41,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=17006, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=27425, PETRI_PLACES=457, PETRI_TRANSITIONS=997} [2024-01-27 15:35:41,812 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 431 predicate places. [2024-01-27 15:35:41,812 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 997 transitions, 27425 flow [2024-01-27 15:35:41,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 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) [2024-01-27 15:35:41,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:41,813 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:41,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:42,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:42,031 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:42,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1828058227, now seen corresponding path program 26 times [2024-01-27 15:35:42,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:42,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835026902] [2024-01-27 15:35:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:42,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:42,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:42,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835026902] [2024-01-27 15:35:42,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835026902] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:42,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709179879] [2024-01-27 15:35:42,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:35:42,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:42,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:42,651 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:42,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-01-27 15:35:42,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:35:42,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:42,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:35:42,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:35:42,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:43,080 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:43,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-27 15:35:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:43,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709179879] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:43,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:43,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 31 [2024-01-27 15:35:43,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787315282] [2024-01-27 15:35:43,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:43,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-27 15:35:43,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:43,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-27 15:35:43,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2024-01-27 15:35:43,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-27 15:35:43,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 997 transitions, 27425 flow. Second operand has 32 states, 32 states have (on average 5.21875) internal successors, (167), 32 states have internal predecessors, (167), 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) [2024-01-27 15:35:43,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:43,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-27 15:35:43,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:46,998 INFO L124 PetriNetUnfolderBase]: 4951/8344 cut-off events. [2024-01-27 15:35:46,998 INFO L125 PetriNetUnfolderBase]: For 349853/349853 co-relation queries the response was YES. [2024-01-27 15:35:47,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98091 conditions, 8344 events. 4951/8344 cut-off events. For 349853/349853 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 54911 event pairs, 888 based on Foata normal form. 1/8345 useless extension candidates. Maximal degree in co-relation 97894. Up to 7959 conditions per place. [2024-01-27 15:35:47,124 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 996 selfloop transitions, 76 changer transitions 1/1074 dead transitions. [2024-01-27 15:35:47,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 1074 transitions, 31171 flow [2024-01-27 15:35:47,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:35:47,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:35:47,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 186 transitions. [2024-01-27 15:35:47,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3381818181818182 [2024-01-27 15:35:47,126 INFO L175 Difference]: Start difference. First operand has 457 places, 997 transitions, 27425 flow. Second operand 22 states and 186 transitions. [2024-01-27 15:35:47,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 1074 transitions, 31171 flow [2024-01-27 15:35:49,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 1074 transitions, 30613 flow, removed 238 selfloop flow, removed 13 redundant places. [2024-01-27 15:35:49,239 INFO L231 Difference]: Finished difference. Result has 469 places, 1021 transitions, 28021 flow [2024-01-27 15:35:49,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=26887, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=997, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=935, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=28021, PETRI_PLACES=469, PETRI_TRANSITIONS=1021} [2024-01-27 15:35:49,240 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 443 predicate places. [2024-01-27 15:35:49,240 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 1021 transitions, 28021 flow [2024-01-27 15:35:49,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.21875) internal successors, (167), 32 states have internal predecessors, (167), 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) [2024-01-27 15:35:49,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:49,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:49,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:49,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:49,443 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:49,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:49,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1768226949, now seen corresponding path program 27 times [2024-01-27 15:35:49,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:49,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429378132] [2024-01-27 15:35:49,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:49,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:50,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:50,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429378132] [2024-01-27 15:35:50,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429378132] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:50,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001378234] [2024-01-27 15:35:50,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:35:50,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:50,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:50,012 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:50,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-01-27 15:35:50,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:35:50,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:50,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:35:50,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:35:50,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:50,449 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:50,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-27 15:35:50,534 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:50,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001378234] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:50,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:50,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 30 [2024-01-27 15:35:50,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284066110] [2024-01-27 15:35:50,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:50,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:35:50,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:50,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:35:50,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:35:50,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-27 15:35:50,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 1021 transitions, 28021 flow. Second operand has 31 states, 31 states have (on average 5.290322580645161) internal successors, (164), 31 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:50,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:50,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-27 15:35:50,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:54,609 INFO L124 PetriNetUnfolderBase]: 5179/8719 cut-off events. [2024-01-27 15:35:54,609 INFO L125 PetriNetUnfolderBase]: For 372651/372651 co-relation queries the response was YES. [2024-01-27 15:35:54,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103195 conditions, 8719 events. 5179/8719 cut-off events. For 372651/372651 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 57716 event pairs, 902 based on Foata normal form. 1/8720 useless extension candidates. Maximal degree in co-relation 102995. Up to 8211 conditions per place. [2024-01-27 15:35:54,735 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 1019 selfloop transitions, 120 changer transitions 1/1141 dead transitions. [2024-01-27 15:35:54,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 1141 transitions, 33296 flow [2024-01-27 15:35:54,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:35:54,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:35:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 218 transitions. [2024-01-27 15:35:54,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488 [2024-01-27 15:35:54,737 INFO L175 Difference]: Start difference. First operand has 469 places, 1021 transitions, 28021 flow. Second operand 25 states and 218 transitions. [2024-01-27 15:35:54,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 1141 transitions, 33296 flow [2024-01-27 15:35:56,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 1141 transitions, 32942 flow, removed 153 selfloop flow, removed 12 redundant places. [2024-01-27 15:35:56,874 INFO L231 Difference]: Finished difference. Result has 487 places, 1079 transitions, 30392 flow [2024-01-27 15:35:56,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=27667, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=933, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=30392, PETRI_PLACES=487, PETRI_TRANSITIONS=1079} [2024-01-27 15:35:56,875 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 461 predicate places. [2024-01-27 15:35:56,875 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 1079 transitions, 30392 flow [2024-01-27 15:35:56,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.290322580645161) internal successors, (164), 31 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:56,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:56,876 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:56,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:57,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:57,076 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:57,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:57,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1943143645, now seen corresponding path program 28 times [2024-01-27 15:35:57,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:57,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543151899] [2024-01-27 15:35:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:57,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:57,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:57,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543151899] [2024-01-27 15:35:57,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543151899] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:57,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128205340] [2024-01-27 15:35:57,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:35:57,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:57,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:57,511 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:57,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-01-27 15:35:57,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:35:57,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:57,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:35:57,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:57,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:57,940 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:57,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-27 15:35:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:58,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128205340] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:58,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:58,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-01-27 15:35:58,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403927586] [2024-01-27 15:35:58,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:58,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:35:58,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:58,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:35:58,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:35:58,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-27 15:35:58,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 1079 transitions, 30392 flow. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 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) [2024-01-27 15:35:58,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:58,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-27 15:35:58,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:36:02,463 INFO L124 PetriNetUnfolderBase]: 5376/9049 cut-off events. [2024-01-27 15:36:02,463 INFO L125 PetriNetUnfolderBase]: For 401832/401832 co-relation queries the response was YES. [2024-01-27 15:36:02,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109887 conditions, 9049 events. 5376/9049 cut-off events. For 401832/401832 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 60324 event pairs, 608 based on Foata normal form. 1/9050 useless extension candidates. Maximal degree in co-relation 109680. Up to 6525 conditions per place. [2024-01-27 15:36:02,598 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 699 selfloop transitions, 539 changer transitions 1/1240 dead transitions. [2024-01-27 15:36:02,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 1240 transitions, 35868 flow [2024-01-27 15:36:02,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-27 15:36:02,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-27 15:36:02,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 284 transitions. [2024-01-27 15:36:02,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34424242424242424 [2024-01-27 15:36:02,599 INFO L175 Difference]: Start difference. First operand has 487 places, 1079 transitions, 30392 flow. Second operand 33 states and 284 transitions. [2024-01-27 15:36:02,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 1240 transitions, 35868 flow [2024-01-27 15:36:05,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 1240 transitions, 35034 flow, removed 383 selfloop flow, removed 12 redundant places. [2024-01-27 15:36:05,425 INFO L231 Difference]: Finished difference. Result has 513 places, 1113 transitions, 32992 flow [2024-01-27 15:36:05,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=29560, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1079, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=509, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=32992, PETRI_PLACES=513, PETRI_TRANSITIONS=1113} [2024-01-27 15:36:05,427 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 487 predicate places. [2024-01-27 15:36:05,427 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 1113 transitions, 32992 flow [2024-01-27 15:36:05,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 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) [2024-01-27 15:36:05,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:36:05,428 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:36:05,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-01-27 15:36:05,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-01-27 15:36:05,643 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:36:05,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:36:05,643 INFO L85 PathProgramCache]: Analyzing trace with hash 22638463, now seen corresponding path program 29 times [2024-01-27 15:36:05,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:36:05,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527648612] [2024-01-27 15:36:05,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:36:05,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:36:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:06,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:36:06,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527648612] [2024-01-27 15:36:06,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527648612] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:36:06,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007232372] [2024-01-27 15:36:06,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:36:06,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:06,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:36:06,168 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:36:06,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-01-27 15:36:06,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:36:06,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:36:06,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-27 15:36:06,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:36:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:36:06,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:36:06,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:36:06,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-27 15:36:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:36:06,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007232372] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:36:06,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:36:06,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 9] total 26 [2024-01-27 15:36:06,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043976902] [2024-01-27 15:36:06,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:36:06,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:36:06,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:36:06,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:36:06,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:36:06,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-01-27 15:36:06,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 1113 transitions, 32992 flow. Second operand has 27 states, 27 states have (on average 6.074074074074074) internal successors, (164), 27 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:06,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:36:06,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-01-27 15:36:06,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:36:10,959 INFO L124 PetriNetUnfolderBase]: 4739/8297 cut-off events. [2024-01-27 15:36:10,960 INFO L125 PetriNetUnfolderBase]: For 456270/457149 co-relation queries the response was YES. [2024-01-27 15:36:11,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109096 conditions, 8297 events. 4739/8297 cut-off events. For 456270/457149 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 58427 event pairs, 603 based on Foata normal form. 220/8475 useless extension candidates. Maximal degree in co-relation 108882. Up to 7053 conditions per place. [2024-01-27 15:36:11,093 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 968 selfloop transitions, 160 changer transitions 1/1209 dead transitions. [2024-01-27 15:36:11,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 1209 transitions, 37147 flow [2024-01-27 15:36:11,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 15:36:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 15:36:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 245 transitions. [2024-01-27 15:36:11,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769230769230769 [2024-01-27 15:36:11,094 INFO L175 Difference]: Start difference. First operand has 513 places, 1113 transitions, 32992 flow. Second operand 26 states and 245 transitions. [2024-01-27 15:36:11,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 1209 transitions, 37147 flow [2024-01-27 15:36:13,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 1209 transitions, 36509 flow, removed 246 selfloop flow, removed 20 redundant places. [2024-01-27 15:36:13,831 INFO L231 Difference]: Finished difference. Result has 522 places, 1143 transitions, 34000 flow [2024-01-27 15:36:13,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=32367, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=964, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=34000, PETRI_PLACES=522, PETRI_TRANSITIONS=1143} [2024-01-27 15:36:13,832 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 496 predicate places. [2024-01-27 15:36:13,832 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 1143 transitions, 34000 flow [2024-01-27 15:36:13,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.074074074074074) internal successors, (164), 27 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:13,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:36:13,833 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:36:13,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-01-27 15:36:14,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:14,033 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:36:14,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:36:14,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1723474531, now seen corresponding path program 30 times [2024-01-27 15:36:14,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:36:14,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725268975] [2024-01-27 15:36:14,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:36:14,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:36:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:14,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:36:14,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725268975] [2024-01-27 15:36:14,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725268975] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:36:14,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655530208] [2024-01-27 15:36:14,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:36:14,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:14,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:36:14,480 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:36:14,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-01-27 15:36:14,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:36:14,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:36:14,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:36:14,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:36:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:36:14,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:36:14,838 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:36:14,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-27 15:36:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:36:14,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655530208] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:36:14,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:36:14,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 28 [2024-01-27 15:36:14,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299724243] [2024-01-27 15:36:14,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:36:14,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:36:14,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:36:14,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:36:14,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:36:14,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-01-27 15:36:14,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 1143 transitions, 34000 flow. Second operand has 29 states, 29 states have (on average 5.344827586206897) internal successors, (155), 29 states have internal predecessors, (155), 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) [2024-01-27 15:36:14,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:36:14,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-01-27 15:36:14,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:36:19,973 INFO L124 PetriNetUnfolderBase]: 6105/10277 cut-off events. [2024-01-27 15:36:19,973 INFO L125 PetriNetUnfolderBase]: For 565194/565194 co-relation queries the response was YES. [2024-01-27 15:36:20,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133561 conditions, 10277 events. 6105/10277 cut-off events. For 565194/565194 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 69551 event pairs, 1002 based on Foata normal form. 2/10279 useless extension candidates. Maximal degree in co-relation 133342. Up to 8741 conditions per place. [2024-01-27 15:36:20,114 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 1076 selfloop transitions, 270 changer transitions 2/1349 dead transitions. [2024-01-27 15:36:20,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 1349 transitions, 43047 flow [2024-01-27 15:36:20,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-27 15:36:20,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-27 15:36:20,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 280 transitions. [2024-01-27 15:36:20,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37333333333333335 [2024-01-27 15:36:20,116 INFO L175 Difference]: Start difference. First operand has 522 places, 1143 transitions, 34000 flow. Second operand 30 states and 280 transitions. [2024-01-27 15:36:20,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 1349 transitions, 43047 flow [2024-01-27 15:36:24,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 1349 transitions, 42612 flow, removed 153 selfloop flow, removed 18 redundant places. [2024-01-27 15:36:24,152 INFO L231 Difference]: Finished difference. Result has 542 places, 1241 transitions, 38844 flow [2024-01-27 15:36:24,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=33621, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=918, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=38844, PETRI_PLACES=542, PETRI_TRANSITIONS=1241} [2024-01-27 15:36:24,153 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 516 predicate places. [2024-01-27 15:36:24,153 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 1241 transitions, 38844 flow [2024-01-27 15:36:24,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.344827586206897) internal successors, (155), 29 states have internal predecessors, (155), 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) [2024-01-27 15:36:24,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:36:24,153 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:36:24,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-01-27 15:36:24,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:24,354 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:36:24,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:36:24,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1646007299, now seen corresponding path program 31 times [2024-01-27 15:36:24,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:36:24,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723606375] [2024-01-27 15:36:24,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:36:24,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:36:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:36:24,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:36:24,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723606375] [2024-01-27 15:36:24,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723606375] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:36:24,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423745980] [2024-01-27 15:36:24,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:36:24,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:24,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:36:24,666 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:36:24,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-01-27 15:36:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:24,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:36:24,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:36:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:36:24,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:36:25,062 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:36:25,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-01-27 15:36:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:36:25,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423745980] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:36:25,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:36:25,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2024-01-27 15:36:25,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262067228] [2024-01-27 15:36:25,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:36:25,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:36:25,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:36:25,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:36:25,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:36:25,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-01-27 15:36:25,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 1241 transitions, 38844 flow. Second operand has 26 states, 26 states have (on average 6.961538461538462) internal successors, (181), 26 states have internal predecessors, (181), 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) [2024-01-27 15:36:25,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:36:25,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-01-27 15:36:25,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:36:29,135 INFO L124 PetriNetUnfolderBase]: 4623/8326 cut-off events. [2024-01-27 15:36:29,136 INFO L125 PetriNetUnfolderBase]: For 544718/545667 co-relation queries the response was YES. [2024-01-27 15:36:29,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120752 conditions, 8326 events. 4623/8326 cut-off events. For 544718/545667 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 61279 event pairs, 519 based on Foata normal form. 408/8665 useless extension candidates. Maximal degree in co-relation 120524. Up to 6858 conditions per place. [2024-01-27 15:36:29,266 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 1112 selfloop transitions, 74 changer transitions 1/1292 dead transitions. [2024-01-27 15:36:29,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1292 transitions, 42652 flow [2024-01-27 15:36:29,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:36:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:36:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-01-27 15:36:29,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44333333333333336 [2024-01-27 15:36:29,267 INFO L175 Difference]: Start difference. First operand has 542 places, 1241 transitions, 38844 flow. Second operand 12 states and 133 transitions. [2024-01-27 15:36:29,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1292 transitions, 42652 flow