./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 273a578a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/unroll-cond-3.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 95e3bac7f28ae020b684175cea363a5866905518c289fbd40a07a7a3764acade --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-273a578-m [2024-02-19 15:30:30,460 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-19 15:30:30,522 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-19 15:30:30,526 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-19 15:30:30,526 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-19 15:30:30,541 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-19 15:30:30,542 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-19 15:30:30,542 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-19 15:30:30,542 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-19 15:30:30,543 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-19 15:30:30,543 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-19 15:30:30,543 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-19 15:30:30,544 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-19 15:30:30,544 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-19 15:30:30,544 INFO L153 SettingsManager]: * Use SBE=true [2024-02-19 15:30:30,545 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-19 15:30:30,545 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-19 15:30:30,545 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-19 15:30:30,546 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-19 15:30:30,546 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-19 15:30:30,546 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-19 15:30:30,547 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-19 15:30:30,547 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-19 15:30:30,547 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-19 15:30:30,547 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-19 15:30:30,548 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-19 15:30:30,548 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-19 15:30:30,548 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-19 15:30:30,549 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-19 15:30:30,549 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-19 15:30:30,549 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-19 15:30:30,549 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-19 15:30:30,550 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 15:30:30,550 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-19 15:30:30,550 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-19 15:30:30,550 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-19 15:30:30,551 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-19 15:30:30,551 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-19 15:30:30,551 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-19 15:30:30,551 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-19 15:30:30,552 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-19 15:30:30,552 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-19 15:30:30,552 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-19 15:30:30,552 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95e3bac7f28ae020b684175cea363a5866905518c289fbd40a07a7a3764acade Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-19 15:30:30,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-19 15:30:30,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-19 15:30:30,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-19 15:30:30,865 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-19 15:30:30,865 INFO L274 PluginConnector]: CDTParser initialized [2024-02-19 15:30:30,866 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c [2024-02-19 15:30:31,932 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-19 15:30:32,109 INFO L384 CDTParser]: Found 1 translation units. [2024-02-19 15:30:32,110 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c [2024-02-19 15:30:32,119 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbb9caf9c/3f81ca1228c048bf91b862f1043c39ae/FLAG475ba0339 [2024-02-19 15:30:32,135 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbb9caf9c/3f81ca1228c048bf91b862f1043c39ae [2024-02-19 15:30:32,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-19 15:30:32,141 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-19 15:30:32,144 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-19 15:30:32,144 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-19 15:30:32,148 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-19 15:30:32,148 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 03:30:32" (1/1) ... [2024-02-19 15:30:32,149 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68d1bdde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:30:32, skipping insertion in model container [2024-02-19 15:30:32,149 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 03:30:32" (1/1) ... [2024-02-19 15:30:32,169 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-19 15:30:32,343 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/unroll-cond-3.wvr.c[2641,2654] [2024-02-19 15:30:32,367 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 15:30:32,375 INFO L202 MainTranslator]: Completed pre-run [2024-02-19 15:30:32,407 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/unroll-cond-3.wvr.c[2641,2654] [2024-02-19 15:30:32,413 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 15:30:32,428 INFO L206 MainTranslator]: Completed translation [2024-02-19 15:30:32,429 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:30:32 WrapperNode [2024-02-19 15:30:32,429 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-19 15:30:32,430 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-19 15:30:32,430 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-19 15:30:32,430 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-19 15:30:32,435 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:30:32" (1/1) ... [2024-02-19 15:30:32,449 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:30:32" (1/1) ... [2024-02-19 15:30:32,476 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 165 [2024-02-19 15:30:32,476 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-19 15:30:32,477 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-19 15:30:32,477 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-19 15:30:32,477 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-19 15:30:32,485 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:30:32" (1/1) ... [2024-02-19 15:30:32,485 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:30:32" (1/1) ... [2024-02-19 15:30:32,497 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:30:32" (1/1) ... [2024-02-19 15:30:32,517 INFO L175 MemorySlicer]: Split 13 memory accesses to 4 slices as follows [2, 2, 2, 7]. 54 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]. [2024-02-19 15:30:32,517 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:30:32" (1/1) ... [2024-02-19 15:30:32,517 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:30:32" (1/1) ... [2024-02-19 15:30:32,528 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:30:32" (1/1) ... [2024-02-19 15:30:32,535 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:30:32" (1/1) ... [2024-02-19 15:30:32,537 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:30:32" (1/1) ... [2024-02-19 15:30:32,540 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:30:32" (1/1) ... [2024-02-19 15:30:32,542 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-19 15:30:32,543 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-19 15:30:32,543 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-19 15:30:32,544 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-19 15:30:32,544 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:30:32" (1/1) ... [2024-02-19 15:30:32,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 15:30:32,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:30:32,567 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-19 15:30:32,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-19 15:30:32,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-19 15:30:32,608 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-19 15:30:32,608 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-19 15:30:32,609 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-19 15:30:32,609 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-19 15:30:32,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-19 15:30:32,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-19 15:30:32,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-19 15:30:32,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-19 15:30:32,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-19 15:30:32,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-19 15:30:32,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-19 15:30:32,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-19 15:30:32,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-19 15:30:32,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-19 15:30:32,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-19 15:30:32,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-19 15:30:32,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-19 15:30:32,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-19 15:30:32,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-19 15:30:32,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-19 15:30:32,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-19 15:30:32,624 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-19 15:30:32,728 INFO L244 CfgBuilder]: Building ICFG [2024-02-19 15:30:32,730 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-19 15:30:32,963 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-19 15:30:32,963 INFO L293 CfgBuilder]: Performing block encoding [2024-02-19 15:30:33,152 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-19 15:30:33,152 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-19 15:30:33,153 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 03:30:33 BoogieIcfgContainer [2024-02-19 15:30:33,153 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-19 15:30:33,154 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-19 15:30:33,154 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-19 15:30:33,157 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-19 15:30:33,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 03:30:32" (1/3) ... [2024-02-19 15:30:33,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@262a5f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 03:30:33, skipping insertion in model container [2024-02-19 15:30:33,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:30:32" (2/3) ... [2024-02-19 15:30:33,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@262a5f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 03:30:33, skipping insertion in model container [2024-02-19 15:30:33,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 03:30:33" (3/3) ... [2024-02-19 15:30:33,159 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2024-02-19 15:30:33,172 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-19 15:30:33,173 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-19 15:30:33,173 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-19 15:30:33,204 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-19 15:30:33,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2024-02-19 15:30:33,263 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2024-02-19 15:30:33,263 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-19 15:30:33,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-02-19 15:30:33,265 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2024-02-19 15:30:33,268 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2024-02-19 15:30:33,290 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 15:30:33,296 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5ad63fd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 15:30:33,297 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-19 15:30:33,307 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 15:30:33,307 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2024-02-19 15:30:33,307 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-19 15:30:33,307 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:30:33,308 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:30:33,308 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:30:33,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:30:33,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1507568136, now seen corresponding path program 1 times [2024-02-19 15:30:33,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:30:33,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658122027] [2024-02-19 15:30:33,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:30:33,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:30:33,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:30:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:30:33,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:30:33,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658122027] [2024-02-19 15:30:33,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658122027] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:30:33,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:30:33,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 15:30:33,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257061561] [2024-02-19 15:30:33,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:30:33,705 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 15:30:33,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:30:33,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 15:30:33,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 15:30:33,809 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-02-19 15:30:33,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:33,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:30:33,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-02-19 15:30:33,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:30:33,896 INFO L124 PetriNetUnfolderBase]: 49/85 cut-off events. [2024-02-19 15:30:33,896 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-19 15:30:33,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 85 events. 49/85 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 186 event pairs, 19 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2024-02-19 15:30:33,899 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 14 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2024-02-19 15:30:33,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 19 transitions, 82 flow [2024-02-19 15:30:33,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 15:30:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 15:30:33,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 32 transitions. [2024-02-19 15:30:33,907 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-02-19 15:30:33,910 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 2 predicate places. [2024-02-19 15:30:33,910 INFO L507 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 82 flow [2024-02-19 15:30:33,911 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:33,911 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:30:33,911 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:30:33,911 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-19 15:30:33,911 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:30:33,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:30:33,912 INFO L85 PathProgramCache]: Analyzing trace with hash -506812240, now seen corresponding path program 1 times [2024-02-19 15:30:33,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:30:33,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930978590] [2024-02-19 15:30:33,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:30:33,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:30:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:30:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:30:34,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:30:34,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930978590] [2024-02-19 15:30:34,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930978590] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:30:34,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:30:34,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-19 15:30:34,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674148438] [2024-02-19 15:30:34,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:30:34,177 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-19 15:30:34,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:30:34,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-19 15:30:34,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-19 15:30:34,179 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:30:34,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:34,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:30:34,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:30:34,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:30:34,349 INFO L124 PetriNetUnfolderBase]: 72/137 cut-off events. [2024-02-19 15:30:34,349 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-02-19 15:30:34,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 137 events. 72/137 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 363 event pairs, 24 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 286. Up to 113 conditions per place. [2024-02-19 15:30:34,352 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 35 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2024-02-19 15:30:34,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 41 transitions, 261 flow [2024-02-19 15:30:34,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 15:30:34,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 15:30:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2024-02-19 15:30:34,355 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-02-19 15:30:34,355 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2024-02-19 15:30:34,356 INFO L507 AbstractCegarLoop]: Abstraction has has 28 places, 41 transitions, 261 flow [2024-02-19 15:30:34,356 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:34,357 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:30:34,357 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:30:34,357 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-19 15:30:34,358 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:30:34,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:30:34,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1448698392, now seen corresponding path program 2 times [2024-02-19 15:30:34,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:30:34,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340445512] [2024-02-19 15:30:34,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:30:34,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:30:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:30:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:30:34,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:30:34,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340445512] [2024-02-19 15:30:34,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340445512] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:30:34,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:30:34,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-19 15:30:34,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063384340] [2024-02-19 15:30:34,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:30:34,643 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-19 15:30:34,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:30:34,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-19 15:30:34,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-02-19 15:30:34,649 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:30:34,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 41 transitions, 261 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:34,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:30:34,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:30:34,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:30:34,781 INFO L124 PetriNetUnfolderBase]: 109/213 cut-off events. [2024-02-19 15:30:34,781 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-02-19 15:30:34,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 849 conditions, 213 events. 109/213 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 695 event pairs, 4 based on Foata normal form. 1/161 useless extension candidates. Maximal degree in co-relation 688. Up to 183 conditions per place. [2024-02-19 15:30:34,785 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 61 selfloop transitions, 21 changer transitions 2/85 dead transitions. [2024-02-19 15:30:34,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 85 transitions, 709 flow [2024-02-19 15:30:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-19 15:30:34,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-19 15:30:34,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 84 transitions. [2024-02-19 15:30:34,788 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-02-19 15:30:34,789 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2024-02-19 15:30:34,789 INFO L507 AbstractCegarLoop]: Abstraction has has 35 places, 85 transitions, 709 flow [2024-02-19 15:30:34,790 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:34,790 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:30:34,790 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:30:34,790 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-19 15:30:34,790 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:30:34,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:30:34,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1812862384, now seen corresponding path program 3 times [2024-02-19 15:30:34,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:30:34,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391186713] [2024-02-19 15:30:34,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:30:34,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:30:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:30:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:30:35,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:30:35,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391186713] [2024-02-19 15:30:35,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391186713] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:30:35,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:30:35,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-19 15:30:35,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386056542] [2024-02-19 15:30:35,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:30:35,029 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-19 15:30:35,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:30:35,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-19 15:30:35,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-02-19 15:30:35,032 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:30:35,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 85 transitions, 709 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:35,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:30:35,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:30:35,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:30:35,156 INFO L124 PetriNetUnfolderBase]: 119/229 cut-off events. [2024-02-19 15:30:35,156 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-02-19 15:30:35,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1140 conditions, 229 events. 119/229 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 751 event pairs, 4 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 944. Up to 199 conditions per place. [2024-02-19 15:30:35,158 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 72 selfloop transitions, 19 changer transitions 5/97 dead transitions. [2024-02-19 15:30:35,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 97 transitions, 1003 flow [2024-02-19 15:30:35,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-19 15:30:35,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-19 15:30:35,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-02-19 15:30:35,159 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-02-19 15:30:35,160 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 18 predicate places. [2024-02-19 15:30:35,160 INFO L507 AbstractCegarLoop]: Abstraction has has 40 places, 97 transitions, 1003 flow [2024-02-19 15:30:35,160 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:35,160 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:30:35,160 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:30:35,160 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-19 15:30:35,161 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:30:35,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:30:35,161 INFO L85 PathProgramCache]: Analyzing trace with hash 421245110, now seen corresponding path program 4 times [2024-02-19 15:30:35,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:30:35,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864150918] [2024-02-19 15:30:35,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:30:35,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:30:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:30:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:30:35,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:30:35,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864150918] [2024-02-19 15:30:35,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864150918] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:30:35,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:30:35,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-19 15:30:35,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465643822] [2024-02-19 15:30:35,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:30:35,313 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-19 15:30:35,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:30:35,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-19 15:30:35,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-02-19 15:30:35,314 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:30:35,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 97 transitions, 1003 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:35,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:30:35,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:30:35,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:30:35,408 INFO L124 PetriNetUnfolderBase]: 116/219 cut-off events. [2024-02-19 15:30:35,408 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-02-19 15:30:35,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1309 conditions, 219 events. 116/219 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 703 event pairs, 4 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 1092. Up to 190 conditions per place. [2024-02-19 15:30:35,410 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 67 selfloop transitions, 18 changer transitions 5/91 dead transitions. [2024-02-19 15:30:35,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 91 transitions, 1117 flow [2024-02-19 15:30:35,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-19 15:30:35,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-19 15:30:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2024-02-19 15:30:35,412 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-02-19 15:30:35,412 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2024-02-19 15:30:35,412 INFO L507 AbstractCegarLoop]: Abstraction has has 45 places, 91 transitions, 1117 flow [2024-02-19 15:30:35,412 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:35,413 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:30:35,413 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:30:35,413 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-19 15:30:35,413 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:30:35,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:30:35,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1642418491, now seen corresponding path program 1 times [2024-02-19 15:30:35,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:30:35,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571016163] [2024-02-19 15:30:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:30:35,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:30:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:30:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:30:35,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:30:35,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571016163] [2024-02-19 15:30:35,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571016163] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:30:35,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007616324] [2024-02-19 15:30:35,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:30:35,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:30:35,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:30:35,552 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:30:35,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-19 15:30:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:30:35,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjunts are in the unsatisfiable core [2024-02-19 15:30:35,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:30:35,693 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 [2024-02-19 15:30:35,900 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-19 15:30:35,901 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 117 treesize of output 104 [2024-02-19 15:30:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:30:36,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:30:36,769 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 87 treesize of output 77 [2024-02-19 15:30:36,797 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:30:36,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 188 [2024-02-19 15:30:37,428 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 [2024-02-19 15:30:37,434 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-02-19 15:30:37,435 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 62 treesize of output 1 [2024-02-19 15:30:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:30:37,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007616324] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:30:37,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:30:37,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-02-19 15:30:37,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50400178] [2024-02-19 15:30:37,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:30:37,474 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-19 15:30:37,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:30:37,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-19 15:30:37,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-02-19 15:30:37,547 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:30:37,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 91 transitions, 1117 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:37,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:30:37,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:30:37,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:30:40,470 INFO L124 PetriNetUnfolderBase]: 410/797 cut-off events. [2024-02-19 15:30:40,470 INFO L125 PetriNetUnfolderBase]: For 185/185 co-relation queries the response was YES. [2024-02-19 15:30:40,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5545 conditions, 797 events. 410/797 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3997 event pairs, 0 based on Foata normal form. 5/596 useless extension candidates. Maximal degree in co-relation 2524. Up to 714 conditions per place. [2024-02-19 15:30:40,476 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 173 selfloop transitions, 62 changer transitions 98/334 dead transitions. [2024-02-19 15:30:40,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 334 transitions, 4826 flow [2024-02-19 15:30:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-02-19 15:30:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-02-19 15:30:40,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 326 transitions. [2024-02-19 15:30:40,478 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4704184704184704 [2024-02-19 15:30:40,478 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 55 predicate places. [2024-02-19 15:30:40,478 INFO L507 AbstractCegarLoop]: Abstraction has has 77 places, 334 transitions, 4826 flow [2024-02-19 15:30:40,479 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:40,479 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:30:40,479 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:30:40,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-19 15:30:40,692 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-02-19 15:30:40,693 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:30:40,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:30:40,693 INFO L85 PathProgramCache]: Analyzing trace with hash -307837155, now seen corresponding path program 2 times [2024-02-19 15:30:40,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:30:40,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072455245] [2024-02-19 15:30:40,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:30:40,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:30:40,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:30:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:30:40,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:30:40,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072455245] [2024-02-19 15:30:40,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072455245] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:30:40,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001812663] [2024-02-19 15:30:40,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 15:30:40,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:30:40,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:30:40,845 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:30:40,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-19 15:30:40,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 15:30:40,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:30:40,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjunts are in the unsatisfiable core [2024-02-19 15:30:40,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:30:40,970 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 [2024-02-19 15:30:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:30:41,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:30:42,105 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 87 treesize of output 77 [2024-02-19 15:30:42,142 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:30:42,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 188 [2024-02-19 15:30:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:30:42,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001812663] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:30:42,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:30:42,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2024-02-19 15:30:42,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797107951] [2024-02-19 15:30:42,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:30:42,937 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-19 15:30:42,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:30:42,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-19 15:30:42,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-02-19 15:30:42,948 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:30:42,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 334 transitions, 4826 flow. Second operand has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:42,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:30:42,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:30:42,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:30:44,369 INFO L124 PetriNetUnfolderBase]: 576/1097 cut-off events. [2024-02-19 15:30:44,370 INFO L125 PetriNetUnfolderBase]: For 237/237 co-relation queries the response was YES. [2024-02-19 15:30:44,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8768 conditions, 1097 events. 576/1097 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5935 event pairs, 4 based on Foata normal form. 4/795 useless extension candidates. Maximal degree in co-relation 4305. Up to 1015 conditions per place. [2024-02-19 15:30:44,376 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 195 selfloop transitions, 67 changer transitions 202/465 dead transitions. [2024-02-19 15:30:44,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 465 transitions, 7669 flow [2024-02-19 15:30:44,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-02-19 15:30:44,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-02-19 15:30:44,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 249 transitions. [2024-02-19 15:30:44,378 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4742857142857143 [2024-02-19 15:30:44,379 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 79 predicate places. [2024-02-19 15:30:44,379 INFO L507 AbstractCegarLoop]: Abstraction has has 101 places, 465 transitions, 7669 flow [2024-02-19 15:30:44,379 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:44,379 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:30:44,380 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:30:44,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-19 15:30:44,591 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-02-19 15:30:44,592 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:30:44,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:30:44,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1261879985, now seen corresponding path program 3 times [2024-02-19 15:30:44,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:30:44,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852338871] [2024-02-19 15:30:44,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:30:44,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:30:44,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:30:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:30:44,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:30:44,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852338871] [2024-02-19 15:30:44,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852338871] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:30:44,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188864435] [2024-02-19 15:30:44,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 15:30:44,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:30:44,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:30:44,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:30:44,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-19 15:30:44,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 15:30:44,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:30:44,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 32 conjunts are in the unsatisfiable core [2024-02-19 15:30:44,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:30:44,920 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 [2024-02-19 15:30:45,189 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 21 [2024-02-19 15:30:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:30:45,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:30:45,822 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 87 treesize of output 77 [2024-02-19 15:30:45,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:30:45,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 202 treesize of output 192 [2024-02-19 15:30:46,409 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 [2024-02-19 15:30:46,413 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-02-19 15:30:46,414 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 62 treesize of output 1 [2024-02-19 15:30:46,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:30:46,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188864435] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:30:46,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:30:46,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-02-19 15:30:46,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004700671] [2024-02-19 15:30:46,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:30:46,435 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-19 15:30:46,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:30:46,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-19 15:30:46,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-02-19 15:30:46,442 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:30:46,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 465 transitions, 7669 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:46,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:30:46,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:30:46,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:30:48,115 INFO L124 PetriNetUnfolderBase]: 750/1551 cut-off events. [2024-02-19 15:30:48,116 INFO L125 PetriNetUnfolderBase]: For 337/337 co-relation queries the response was YES. [2024-02-19 15:30:48,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13967 conditions, 1551 events. 750/1551 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 9973 event pairs, 0 based on Foata normal form. 5/1132 useless extension candidates. Maximal degree in co-relation 7882. Up to 1463 conditions per place. [2024-02-19 15:30:48,126 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 238 selfloop transitions, 112 changer transitions 404/755 dead transitions. [2024-02-19 15:30:48,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 755 transitions, 14010 flow [2024-02-19 15:30:48,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-02-19 15:30:48,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-02-19 15:30:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 315 transitions. [2024-02-19 15:30:48,128 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-02-19 15:30:48,128 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 114 predicate places. [2024-02-19 15:30:48,129 INFO L507 AbstractCegarLoop]: Abstraction has has 136 places, 755 transitions, 14010 flow [2024-02-19 15:30:48,129 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:48,129 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:30:48,129 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:30:48,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-19 15:30:48,341 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:30:48,341 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:30:48,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:30:48,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1799735563, now seen corresponding path program 4 times [2024-02-19 15:30:48,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:30:48,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611484787] [2024-02-19 15:30:48,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:30:48,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:30:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:30:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:30:48,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:30:48,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611484787] [2024-02-19 15:30:48,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611484787] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:30:48,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453689685] [2024-02-19 15:30:48,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 15:30:48,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:30:48,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:30:48,490 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:30:48,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-19 15:30:48,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 15:30:48,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:30:48,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-19 15:30:48,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:30:48,577 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 [2024-02-19 15:30:48,760 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 21 [2024-02-19 15:30:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:30:48,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:30:49,310 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 [2024-02-19 15:30:49,317 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-19 15:30:49,318 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 62 treesize of output 41 [2024-02-19 15:30:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:30:49,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453689685] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:30:49,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:30:49,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-02-19 15:30:49,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373495402] [2024-02-19 15:30:49,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:30:49,349 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-19 15:30:49,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:30:49,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-19 15:30:49,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-02-19 15:30:49,353 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:30:49,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 755 transitions, 14010 flow. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:49,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:30:49,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:30:49,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:30:53,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-19 15:30:55,206 INFO L124 PetriNetUnfolderBase]: 886/1862 cut-off events. [2024-02-19 15:30:55,206 INFO L125 PetriNetUnfolderBase]: For 406/406 co-relation queries the response was YES. [2024-02-19 15:30:55,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18645 conditions, 1862 events. 886/1862 cut-off events. For 406/406 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 12794 event pairs, 0 based on Foata normal form. 4/1352 useless extension candidates. Maximal degree in co-relation 10923. Up to 1773 conditions per place. [2024-02-19 15:30:55,219 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 283 selfloop transitions, 131 changer transitions 532/947 dead transitions. [2024-02-19 15:30:55,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 947 transitions, 19481 flow [2024-02-19 15:30:55,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-02-19 15:30:55,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-02-19 15:30:55,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 306 transitions. [2024-02-19 15:30:55,223 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-02-19 15:30:55,224 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 149 predicate places. [2024-02-19 15:30:55,224 INFO L507 AbstractCegarLoop]: Abstraction has has 171 places, 947 transitions, 19481 flow [2024-02-19 15:30:55,224 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:55,224 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:30:55,224 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:30:55,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-19 15:30:55,436 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:30:55,437 INFO L432 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:30:55,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:30:55,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1228280757, now seen corresponding path program 5 times [2024-02-19 15:30:55,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:30:55,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928975007] [2024-02-19 15:30:55,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:30:55,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:30:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:30:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:30:55,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:30:55,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928975007] [2024-02-19 15:30:55,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928975007] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:30:55,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279854174] [2024-02-19 15:30:55,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 15:30:55,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:30:55,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:30:55,608 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:30:55,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-19 15:30:55,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 15:30:55,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:30:55,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 32 conjunts are in the unsatisfiable core [2024-02-19 15:30:55,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:30:55,758 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 [2024-02-19 15:30:56,092 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 57 treesize of output 41 [2024-02-19 15:30:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:30:56,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:30:56,878 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 [2024-02-19 15:30:56,885 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-19 15:30:56,885 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 62 treesize of output 41 [2024-02-19 15:30:56,899 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 87 treesize of output 77 [2024-02-19 15:30:56,933 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2024-02-19 15:30:56,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 164 [2024-02-19 15:30:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:30:57,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279854174] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:30:57,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:30:57,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-02-19 15:30:57,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225009613] [2024-02-19 15:30:57,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:30:57,160 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-19 15:30:57,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:30:57,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-19 15:30:57,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-02-19 15:30:57,162 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:30:57,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 947 transitions, 19481 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:57,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:30:57,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:30:57,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:30:59,601 INFO L124 PetriNetUnfolderBase]: 971/2113 cut-off events. [2024-02-19 15:30:59,601 INFO L125 PetriNetUnfolderBase]: For 464/464 co-relation queries the response was YES. [2024-02-19 15:30:59,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23284 conditions, 2113 events. 971/2113 cut-off events. For 464/464 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15419 event pairs, 0 based on Foata normal form. 6/1549 useless extension candidates. Maximal degree in co-relation 14043. Up to 2012 conditions per place. [2024-02-19 15:30:59,613 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 249 selfloop transitions, 91 changer transitions 758/1099 dead transitions. [2024-02-19 15:30:59,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 1099 transitions, 24838 flow [2024-02-19 15:30:59,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-02-19 15:30:59,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-02-19 15:30:59,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 295 transitions. [2024-02-19 15:30:59,615 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.43898809523809523 [2024-02-19 15:30:59,615 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 180 predicate places. [2024-02-19 15:30:59,615 INFO L507 AbstractCegarLoop]: Abstraction has has 202 places, 1099 transitions, 24838 flow [2024-02-19 15:30:59,616 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:30:59,616 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:30:59,616 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:30:59,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-19 15:30:59,827 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-02-19 15:30:59,827 INFO L432 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:30:59,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:30:59,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1147160237, now seen corresponding path program 6 times [2024-02-19 15:30:59,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:30:59,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285980767] [2024-02-19 15:30:59,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:30:59,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:30:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:30:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:30:59,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:30:59,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285980767] [2024-02-19 15:30:59,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285980767] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:30:59,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545743268] [2024-02-19 15:30:59,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 15:30:59,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:30:59,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:30:59,937 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:30:59,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-19 15:31:00,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-19 15:31:00,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:31:00,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2024-02-19 15:31:00,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:31:00,184 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:31:00,184 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 115 treesize of output 109 [2024-02-19 15:31:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:00,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:31:00,613 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:31:00,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 59 [2024-02-19 15:31:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:00,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545743268] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:31:00,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:31:00,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2024-02-19 15:31:00,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708478351] [2024-02-19 15:31:00,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:31:00,705 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-19 15:31:00,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:31:00,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-19 15:31:00,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-02-19 15:31:00,710 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:31:00,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 1099 transitions, 24838 flow. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:31:00,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:31:00,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:31:00,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:31:02,748 INFO L124 PetriNetUnfolderBase]: 1032/2227 cut-off events. [2024-02-19 15:31:02,748 INFO L125 PetriNetUnfolderBase]: For 495/495 co-relation queries the response was YES. [2024-02-19 15:31:02,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26750 conditions, 2227 events. 1032/2227 cut-off events. For 495/495 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 16333 event pairs, 0 based on Foata normal form. 0/1627 useless extension candidates. Maximal degree in co-relation 16030. Up to 2114 conditions per place. [2024-02-19 15:31:02,764 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 280 selfloop transitions, 70 changer transitions 812/1163 dead transitions. [2024-02-19 15:31:02,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 1163 transitions, 28601 flow [2024-02-19 15:31:02,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-19 15:31:02,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-19 15:31:02,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 155 transitions. [2024-02-19 15:31:02,767 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-02-19 15:31:02,767 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 194 predicate places. [2024-02-19 15:31:02,767 INFO L507 AbstractCegarLoop]: Abstraction has has 216 places, 1163 transitions, 28601 flow [2024-02-19 15:31:02,768 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:31:02,768 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:31:02,768 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:31:02,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-19 15:31:02,979 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:31:02,980 INFO L432 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:31:02,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:31:02,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1296297583, now seen corresponding path program 7 times [2024-02-19 15:31:02,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:31:02,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977296913] [2024-02-19 15:31:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:31:02,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:31:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:31:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:03,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:31:03,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977296913] [2024-02-19 15:31:03,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977296913] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:31:03,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369202250] [2024-02-19 15:31:03,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 15:31:03,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:31:03,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:31:03,177 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) [2024-02-19 15:31:03,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-19 15:31:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:31:03,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-19 15:31:03,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:31:03,452 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 15 treesize of output 7 [2024-02-19 15:31:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:03,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:31:03,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:31:03,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 59 [2024-02-19 15:31:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:04,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369202250] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:31:04,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:31:04,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2024-02-19 15:31:04,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453827821] [2024-02-19 15:31:04,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:31:04,021 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-19 15:31:04,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:31:04,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-19 15:31:04,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-02-19 15:31:04,027 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:31:04,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 1163 transitions, 28601 flow. Second operand has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:31:04,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:31:04,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:31:04,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:31:07,414 INFO L124 PetriNetUnfolderBase]: 1044/2254 cut-off events. [2024-02-19 15:31:07,414 INFO L125 PetriNetUnfolderBase]: For 502/502 co-relation queries the response was YES. [2024-02-19 15:31:07,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29327 conditions, 2254 events. 1044/2254 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 16603 event pairs, 0 based on Foata normal form. 0/1650 useless extension candidates. Maximal degree in co-relation 17635. Up to 2142 conditions per place. [2024-02-19 15:31:07,427 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 276 selfloop transitions, 72 changer transitions 830/1179 dead transitions. [2024-02-19 15:31:07,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 1179 transitions, 31356 flow [2024-02-19 15:31:07,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-02-19 15:31:07,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-02-19 15:31:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 177 transitions. [2024-02-19 15:31:07,429 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-02-19 15:31:07,429 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 211 predicate places. [2024-02-19 15:31:07,429 INFO L507 AbstractCegarLoop]: Abstraction has has 233 places, 1179 transitions, 31356 flow [2024-02-19 15:31:07,429 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:31:07,429 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:31:07,429 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:31:07,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-19 15:31:07,641 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:31:07,641 INFO L432 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:31:07,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:31:07,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1942655508, now seen corresponding path program 1 times [2024-02-19 15:31:07,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:31:07,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680414705] [2024-02-19 15:31:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:31:07,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:31:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:31:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:07,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:31:07,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680414705] [2024-02-19 15:31:07,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680414705] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:31:07,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232961618] [2024-02-19 15:31:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:31:07,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:31:07,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:31:07,740 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) [2024-02-19 15:31:07,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-19 15:31:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:31:07,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-19 15:31:07,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:31:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:07,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:31:07,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:07,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232961618] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:31:07,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:31:07,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-02-19 15:31:07,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248397423] [2024-02-19 15:31:07,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:31:07,950 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 15:31:07,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:31:07,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 15:31:07,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-02-19 15:31:07,956 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:31:07,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 1179 transitions, 31356 flow. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:31:07,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:31:07,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:31:07,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:31:08,919 INFO L124 PetriNetUnfolderBase]: 1068/2310 cut-off events. [2024-02-19 15:31:08,919 INFO L125 PetriNetUnfolderBase]: For 518/518 co-relation queries the response was YES. [2024-02-19 15:31:08,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32356 conditions, 2310 events. 1068/2310 cut-off events. For 518/518 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 17184 event pairs, 0 based on Foata normal form. 0/1706 useless extension candidates. Maximal degree in co-relation 19381. Up to 2198 conditions per place. [2024-02-19 15:31:08,936 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 328 selfloop transitions, 78 changer transitions 971/1378 dead transitions. [2024-02-19 15:31:08,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 1378 transitions, 39408 flow [2024-02-19 15:31:08,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-19 15:31:08,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-19 15:31:08,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 144 transitions. [2024-02-19 15:31:08,938 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-02-19 15:31:08,939 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 226 predicate places. [2024-02-19 15:31:08,939 INFO L507 AbstractCegarLoop]: Abstraction has has 248 places, 1378 transitions, 39408 flow [2024-02-19 15:31:08,939 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:31:08,940 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:31:08,940 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:31:08,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-19 15:31:09,151 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-02-19 15:31:09,152 INFO L432 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:31:09,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:31:09,152 INFO L85 PathProgramCache]: Analyzing trace with hash -724938354, now seen corresponding path program 2 times [2024-02-19 15:31:09,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:31:09,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271053425] [2024-02-19 15:31:09,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:31:09,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:31:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:31:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:09,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:31:09,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271053425] [2024-02-19 15:31:09,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271053425] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:31:09,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983086583] [2024-02-19 15:31:09,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 15:31:09,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:31:09,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:31:09,393 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) [2024-02-19 15:31:09,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-19 15:31:09,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 15:31:09,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:31:09,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-19 15:31:09,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:31:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:09,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:31:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:09,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983086583] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:31:09,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:31:09,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-02-19 15:31:09,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648375144] [2024-02-19 15:31:09,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:31:09,637 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-19 15:31:09,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:31:09,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-19 15:31:09,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-02-19 15:31:09,642 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:31:09,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 1378 transitions, 39408 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:31:09,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:31:09,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:31:09,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:31:14,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-19 15:31:15,291 INFO L124 PetriNetUnfolderBase]: 1297/2716 cut-off events. [2024-02-19 15:31:15,291 INFO L125 PetriNetUnfolderBase]: For 599/599 co-relation queries the response was YES. [2024-02-19 15:31:15,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40734 conditions, 2716 events. 1297/2716 cut-off events. For 599/599 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 20277 event pairs, 0 based on Foata normal form. 0/1984 useless extension candidates. Maximal degree in co-relation 24060. Up to 2601 conditions per place. [2024-02-19 15:31:15,333 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 416 selfloop transitions, 87 changer transitions 1098/1602 dead transitions. [2024-02-19 15:31:15,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 1602 transitions, 48993 flow [2024-02-19 15:31:15,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-19 15:31:15,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-19 15:31:15,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 171 transitions. [2024-02-19 15:31:15,335 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4789915966386555 [2024-02-19 15:31:15,335 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 242 predicate places. [2024-02-19 15:31:15,335 INFO L507 AbstractCegarLoop]: Abstraction has has 264 places, 1602 transitions, 48993 flow [2024-02-19 15:31:15,335 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:31:15,335 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:31:15,336 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:31:15,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-19 15:31:15,547 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-02-19 15:31:15,547 INFO L432 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:31:15,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:31:15,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1126571122, now seen corresponding path program 3 times [2024-02-19 15:31:15,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:31:15,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802632615] [2024-02-19 15:31:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:31:15,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:31:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:31:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:15,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:31:15,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802632615] [2024-02-19 15:31:15,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802632615] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:31:15,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554104711] [2024-02-19 15:31:15,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 15:31:15,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:31:15,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:31:15,673 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) [2024-02-19 15:31:15,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-19 15:31:15,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 15:31:15,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:31:15,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-19 15:31:15,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:31:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:15,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:31:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:15,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554104711] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:31:15,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:31:15,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-02-19 15:31:15,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150576268] [2024-02-19 15:31:15,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:31:15,919 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-19 15:31:15,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:31:15,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-19 15:31:15,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-02-19 15:31:15,923 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:31:15,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 1602 transitions, 48993 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:31:15,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:31:15,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:31:15,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:31:18,141 INFO L124 PetriNetUnfolderBase]: 1282/2708 cut-off events. [2024-02-19 15:31:18,142 INFO L125 PetriNetUnfolderBase]: For 591/591 co-relation queries the response was YES. [2024-02-19 15:31:18,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43317 conditions, 2708 events. 1282/2708 cut-off events. For 591/591 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 20368 event pairs, 0 based on Foata normal form. 0/2012 useless extension candidates. Maximal degree in co-relation 25755. Up to 2594 conditions per place. [2024-02-19 15:31:18,158 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 415 selfloop transitions, 86 changer transitions 1102/1604 dead transitions. [2024-02-19 15:31:18,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 1604 transitions, 52259 flow [2024-02-19 15:31:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-19 15:31:18,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-19 15:31:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 185 transitions. [2024-02-19 15:31:18,160 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.46365914786967416 [2024-02-19 15:31:18,160 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 260 predicate places. [2024-02-19 15:31:18,160 INFO L507 AbstractCegarLoop]: Abstraction has has 282 places, 1604 transitions, 52259 flow [2024-02-19 15:31:18,160 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:31:18,160 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:31:18,161 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:31:18,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-02-19 15:31:18,371 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-19 15:31:18,371 INFO L432 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:31:18,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:31:18,372 INFO L85 PathProgramCache]: Analyzing trace with hash 730962991, now seen corresponding path program 8 times [2024-02-19 15:31:18,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:31:18,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849954665] [2024-02-19 15:31:18,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:31:18,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:31:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:31:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:18,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:31:18,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849954665] [2024-02-19 15:31:18,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849954665] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:31:18,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244061819] [2024-02-19 15:31:18,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 15:31:18,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:31:18,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:31:18,472 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) [2024-02-19 15:31:18,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-19 15:31:18,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 15:31:18,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:31:18,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-19 15:31:18,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:31:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:18,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:31:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:18,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244061819] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:31:18,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:31:18,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-02-19 15:31:18,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413274555] [2024-02-19 15:31:18,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:31:18,661 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-19 15:31:18,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:31:18,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-19 15:31:18,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-02-19 15:31:18,664 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:31:18,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 1604 transitions, 52259 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:31:18,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:31:18,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:31:18,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:31:20,005 INFO L124 PetriNetUnfolderBase]: 1535/3090 cut-off events. [2024-02-19 15:31:20,005 INFO L125 PetriNetUnfolderBase]: For 630/630 co-relation queries the response was YES. [2024-02-19 15:31:20,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52534 conditions, 3090 events. 1535/3090 cut-off events. For 630/630 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 22777 event pairs, 0 based on Foata normal form. 0/2274 useless extension candidates. Maximal degree in co-relation 31723. Up to 2974 conditions per place. [2024-02-19 15:31:20,024 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 464 selfloop transitions, 98 changer transitions 1229/1792 dead transitions. [2024-02-19 15:31:20,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 1792 transitions, 61919 flow [2024-02-19 15:31:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-19 15:31:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-19 15:31:20,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 112 transitions. [2024-02-19 15:31:20,026 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-02-19 15:31:20,027 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 271 predicate places. [2024-02-19 15:31:20,027 INFO L507 AbstractCegarLoop]: Abstraction has has 293 places, 1792 transitions, 61919 flow [2024-02-19 15:31:20,027 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:31:20,027 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:31:20,027 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:31:20,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-19 15:31:20,238 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-02-19 15:31:20,239 INFO L432 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:31:20,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:31:20,239 INFO L85 PathProgramCache]: Analyzing trace with hash -187082776, now seen corresponding path program 4 times [2024-02-19 15:31:20,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:31:20,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168980642] [2024-02-19 15:31:20,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:31:20,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:31:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:31:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:20,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:31:20,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168980642] [2024-02-19 15:31:20,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168980642] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:31:20,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557570452] [2024-02-19 15:31:20,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 15:31:20,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:31:20,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:31:20,402 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) [2024-02-19 15:31:20,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-19 15:31:20,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 15:31:20,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:31:20,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-19 15:31:20,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:31:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:20,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:31:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:20,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557570452] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:31:20,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:31:20,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-02-19 15:31:20,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126713612] [2024-02-19 15:31:20,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:31:20,633 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-19 15:31:20,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:31:20,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-19 15:31:20,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-02-19 15:31:20,638 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:31:20,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 1792 transitions, 61919 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:31:20,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:31:20,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:31:20,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:31:26,642 INFO L124 PetriNetUnfolderBase]: 1787/3530 cut-off events. [2024-02-19 15:31:26,642 INFO L125 PetriNetUnfolderBase]: For 696/696 co-relation queries the response was YES. [2024-02-19 15:31:26,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63512 conditions, 3530 events. 1787/3530 cut-off events. For 696/696 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 26243 event pairs, 0 based on Foata normal form. 0/2576 useless extension candidates. Maximal degree in co-relation 37466. Up to 3411 conditions per place. [2024-02-19 15:31:26,666 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 544 selfloop transitions, 136 changer transitions 1353/2034 dead transitions. [2024-02-19 15:31:26,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 2034 transitions, 74324 flow [2024-02-19 15:31:26,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-19 15:31:26,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-19 15:31:26,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 139 transitions. [2024-02-19 15:31:26,667 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.44126984126984126 [2024-02-19 15:31:26,667 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 285 predicate places. [2024-02-19 15:31:26,668 INFO L507 AbstractCegarLoop]: Abstraction has has 307 places, 2034 transitions, 74324 flow [2024-02-19 15:31:26,668 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:31:26,668 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:31:26,668 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:31:26,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-02-19 15:31:26,879 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-19 15:31:26,879 INFO L432 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:31:26,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:31:26,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1521674106, now seen corresponding path program 5 times [2024-02-19 15:31:26,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:31:26,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736928255] [2024-02-19 15:31:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:31:26,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:31:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:31:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:26,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:31:26,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736928255] [2024-02-19 15:31:26,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736928255] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:31:26,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197433005] [2024-02-19 15:31:26,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 15:31:26,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:31:26,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:31:26,979 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) [2024-02-19 15:31:27,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-19 15:31:27,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 15:31:27,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:31:27,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-19 15:31:27,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:31:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:27,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:31:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:27,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197433005] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:31:27,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:31:27,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-02-19 15:31:27,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308885627] [2024-02-19 15:31:27,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:31:27,256 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-19 15:31:27,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:31:27,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-19 15:31:27,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-02-19 15:31:27,261 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:31:27,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 2034 transitions, 74324 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:31:27,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:31:27,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:31:27,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:31:29,686 INFO L124 PetriNetUnfolderBase]: 2340/4603 cut-off events. [2024-02-19 15:31:29,686 INFO L125 PetriNetUnfolderBase]: For 884/884 co-relation queries the response was YES. [2024-02-19 15:31:29,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87347 conditions, 4603 events. 2340/4603 cut-off events. For 884/884 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 35740 event pairs, 0 based on Foata normal form. 0/3317 useless extension candidates. Maximal degree in co-relation 53155. Up to 4475 conditions per place. [2024-02-19 15:31:29,718 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 671 selfloop transitions, 199 changer transitions 1773/2644 dead transitions. [2024-02-19 15:31:29,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 2644 transitions, 101905 flow [2024-02-19 15:31:29,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-19 15:31:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-19 15:31:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 150 transitions. [2024-02-19 15:31:29,720 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-02-19 15:31:29,720 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 299 predicate places. [2024-02-19 15:31:29,720 INFO L507 AbstractCegarLoop]: Abstraction has has 321 places, 2644 transitions, 101905 flow [2024-02-19 15:31:29,721 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:31:29,721 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:31:29,721 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:31:29,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-02-19 15:31:29,932 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-19 15:31:29,932 INFO L432 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:31:29,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:31:29,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1503240080, now seen corresponding path program 6 times [2024-02-19 15:31:29,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:31:29,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354657669] [2024-02-19 15:31:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:31:29,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:31:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:31:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:30,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:31:30,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354657669] [2024-02-19 15:31:30,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354657669] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:31:30,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167451488] [2024-02-19 15:31:30,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 15:31:30,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:31:30,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:31:30,068 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) [2024-02-19 15:31:30,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-19 15:31:30,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-19 15:31:30,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:31:30,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-19 15:31:30,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:31:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:30,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:31:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:30,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167451488] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:31:30,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:31:30,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-02-19 15:31:30,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568686813] [2024-02-19 15:31:30,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:31:30,317 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 15:31:30,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:31:30,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 15:31:30,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-02-19 15:31:30,327 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:31:30,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 2644 transitions, 101905 flow. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:31:30,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:31:30,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:31:30,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:31:33,867 INFO L124 PetriNetUnfolderBase]: 2628/5176 cut-off events. [2024-02-19 15:31:33,867 INFO L125 PetriNetUnfolderBase]: For 1014/1014 co-relation queries the response was YES. [2024-02-19 15:31:33,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103355 conditions, 5176 events. 2628/5176 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 40786 event pairs, 0 based on Foata normal form. 0/3726 useless extension candidates. Maximal degree in co-relation 63879. Up to 5044 conditions per place. [2024-02-19 15:31:33,905 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 721 selfloop transitions, 238 changer transitions 1994/2954 dead transitions. [2024-02-19 15:31:33,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 2954 transitions, 119786 flow [2024-02-19 15:31:33,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-19 15:31:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-19 15:31:33,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 180 transitions. [2024-02-19 15:31:33,906 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45112781954887216 [2024-02-19 15:31:33,907 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 317 predicate places. [2024-02-19 15:31:33,907 INFO L507 AbstractCegarLoop]: Abstraction has has 339 places, 2954 transitions, 119786 flow [2024-02-19 15:31:33,907 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:31:33,907 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:31:33,907 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:31:33,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-02-19 15:31:34,118 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:31:34,119 INFO L432 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:31:34,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:31:34,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1531595373, now seen corresponding path program 1 times [2024-02-19 15:31:34,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:31:34,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031005749] [2024-02-19 15:31:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:31:34,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:31:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:31:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:34,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:31:34,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031005749] [2024-02-19 15:31:34,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031005749] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:31:34,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764662620] [2024-02-19 15:31:34,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:31:34,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:31:34,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:31:34,286 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) [2024-02-19 15:31:34,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-19 15:31:34,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:31:34,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 49 conjunts are in the unsatisfiable core [2024-02-19 15:31:34,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:31:34,424 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 [2024-02-19 15:31:34,445 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 [2024-02-19 15:31:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:31:34,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:31:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:31:36,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764662620] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:31:36,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:31:36,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 22 [2024-02-19 15:31:36,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997723399] [2024-02-19 15:31:36,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:31:36,536 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-19 15:31:36,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:31:36,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-19 15:31:36,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2024-02-19 15:31:36,539 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:31:36,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 2954 transitions, 119786 flow. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:31:36,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:31:36,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:31:36,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:31:40,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-19 15:32:15,196 WARN L293 SmtUtils]: Spent 26.17s on a formula simplification that was a NOOP. DAG size: 141 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-19 15:32:37,111 WARN L293 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 112 DAG size of output: 96 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-19 15:32:42,457 INFO L124 PetriNetUnfolderBase]: 3308/6376 cut-off events. [2024-02-19 15:32:42,457 INFO L125 PetriNetUnfolderBase]: For 1233/1233 co-relation queries the response was YES. [2024-02-19 15:32:42,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133679 conditions, 6376 events. 3308/6376 cut-off events. For 1233/1233 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 50718 event pairs, 0 based on Foata normal form. 3/4582 useless extension candidates. Maximal degree in co-relation 53888. Up to 6192 conditions per place. [2024-02-19 15:32:42,509 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 937 selfloop transitions, 370 changer transitions 2308/3616 dead transitions. [2024-02-19 15:32:42,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 3616 transitions, 153802 flow [2024-02-19 15:32:42,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-02-19 15:32:42,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-02-19 15:32:42,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 430 transitions. [2024-02-19 15:32:42,511 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4451345755693582 [2024-02-19 15:32:42,511 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 362 predicate places. [2024-02-19 15:32:42,512 INFO L507 AbstractCegarLoop]: Abstraction has has 384 places, 3616 transitions, 153802 flow [2024-02-19 15:32:42,512 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:32:42,512 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:32:42,512 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:32:42,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-02-19 15:32:42,723 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:32:42,723 INFO L432 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:32:42,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:32:42,724 INFO L85 PathProgramCache]: Analyzing trace with hash -89047272, now seen corresponding path program 7 times [2024-02-19 15:32:42,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:32:42,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148962004] [2024-02-19 15:32:42,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:32:42,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:32:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:32:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:32:42,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:32:42,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148962004] [2024-02-19 15:32:42,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148962004] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:32:42,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7676369] [2024-02-19 15:32:42,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 15:32:42,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:32:42,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:32:42,827 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) [2024-02-19 15:32:42,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-19 15:32:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:32:42,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-19 15:32:42,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:32:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:32:43,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:32:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:32:43,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7676369] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:32:43,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:32:43,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-19 15:32:43,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791494224] [2024-02-19 15:32:43,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:32:43,147 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-19 15:32:43,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:32:43,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-19 15:32:43,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-02-19 15:32:43,149 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:32:43,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 3616 transitions, 153802 flow. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:32:43,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:32:43,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:32:43,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:32:46,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-19 15:32:51,933 INFO L124 PetriNetUnfolderBase]: 3324/6481 cut-off events. [2024-02-19 15:32:51,933 INFO L125 PetriNetUnfolderBase]: For 1280/1280 co-relation queries the response was YES. [2024-02-19 15:32:51,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142333 conditions, 6481 events. 3324/6481 cut-off events. For 1280/1280 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 52425 event pairs, 0 based on Foata normal form. 0/4700 useless extension candidates. Maximal degree in co-relation 56962. Up to 6296 conditions per place. [2024-02-19 15:32:51,987 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1065 selfloop transitions, 270 changer transitions 2357/3693 dead transitions. [2024-02-19 15:32:51,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 3693 transitions, 164501 flow [2024-02-19 15:32:51,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-19 15:32:51,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-19 15:32:51,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 203 transitions. [2024-02-19 15:32:51,989 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-02-19 15:32:51,989 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 383 predicate places. [2024-02-19 15:32:51,989 INFO L507 AbstractCegarLoop]: Abstraction has has 405 places, 3693 transitions, 164501 flow [2024-02-19 15:32:51,989 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:32:51,989 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:32:51,989 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:32:52,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-02-19 15:32:52,201 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:32:52,201 INFO L432 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:32:52,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:32:52,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2001244244, now seen corresponding path program 9 times [2024-02-19 15:32:52,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:32:52,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995833198] [2024-02-19 15:32:52,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:32:52,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:32:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:32:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:32:53,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:32:53,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995833198] [2024-02-19 15:32:53,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995833198] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:32:53,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006414162] [2024-02-19 15:32:53,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 15:32:53,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:32:53,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:32:53,146 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) [2024-02-19 15:32:53,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-19 15:32:53,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 15:32:53,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:32:53,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-19 15:32:53,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:32:53,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:32:53,462 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2024-02-19 15:32:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:32:53,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:32:53,680 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:32:53,680 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 198 [2024-02-19 15:32:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:32:54,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006414162] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:32:54,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:32:54,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 22 [2024-02-19 15:32:54,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138517327] [2024-02-19 15:32:54,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:32:54,954 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-19 15:32:54,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:32:54,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-19 15:32:54,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2024-02-19 15:32:54,964 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:32:54,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 3693 transitions, 164501 flow. Second operand has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 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) [2024-02-19 15:32:54,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:32:54,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:32:54,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:33:03,918 INFO L124 PetriNetUnfolderBase]: 3433/6688 cut-off events. [2024-02-19 15:33:03,919 INFO L125 PetriNetUnfolderBase]: For 1332/1332 co-relation queries the response was YES. [2024-02-19 15:33:03,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153586 conditions, 6688 events. 3433/6688 cut-off events. For 1332/1332 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 54451 event pairs, 0 based on Foata normal form. 3/4846 useless extension candidates. Maximal degree in co-relation 61439. Up to 6504 conditions per place. [2024-02-19 15:33:03,975 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 1051 selfloop transitions, 272 changer transitions 2479/3803 dead transitions. [2024-02-19 15:33:03,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 3803 transitions, 177029 flow [2024-02-19 15:33:03,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-02-19 15:33:03,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-02-19 15:33:03,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 246 transitions. [2024-02-19 15:33:03,976 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3778801843317972 [2024-02-19 15:33:03,977 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 413 predicate places. [2024-02-19 15:33:03,977 INFO L507 AbstractCegarLoop]: Abstraction has has 435 places, 3803 transitions, 177029 flow [2024-02-19 15:33:03,977 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 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) [2024-02-19 15:33:03,977 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:33:03,977 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:33:03,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-02-19 15:33:04,188 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:33:04,189 INFO L432 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:33:04,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:33:04,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1098765002, now seen corresponding path program 8 times [2024-02-19 15:33:04,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:33:04,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427904521] [2024-02-19 15:33:04,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:33:04,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:33:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:33:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:33:04,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:33:04,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427904521] [2024-02-19 15:33:04,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427904521] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:33:04,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779371370] [2024-02-19 15:33:04,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 15:33:04,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:33:04,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:33:04,325 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) [2024-02-19 15:33:04,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-19 15:33:04,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 15:33:04,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:33:04,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-19 15:33:04,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:33:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:33:04,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:33:04,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:33:04,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779371370] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:33:04,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:33:04,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-02-19 15:33:04,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158416781] [2024-02-19 15:33:04,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:33:04,627 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-19 15:33:04,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:33:04,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-19 15:33:04,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-02-19 15:33:04,634 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:33:04,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 3803 transitions, 177029 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:33:04,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:33:04,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:33:04,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:33:15,132 INFO L124 PetriNetUnfolderBase]: 3752/7303 cut-off events. [2024-02-19 15:33:15,133 INFO L125 PetriNetUnfolderBase]: For 1434/1434 co-relation queries the response was YES. [2024-02-19 15:33:15,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174901 conditions, 7303 events. 3752/7303 cut-off events. For 1434/1434 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 60328 event pairs, 0 based on Foata normal form. 0/5298 useless extension candidates. Maximal degree in co-relation 68432. Up to 7112 conditions per place. [2024-02-19 15:33:15,196 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 1052 selfloop transitions, 460 changer transitions 2643/4156 dead transitions. [2024-02-19 15:33:15,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 4156 transitions, 201775 flow [2024-02-19 15:33:15,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-02-19 15:33:15,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-02-19 15:33:15,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 281 transitions. [2024-02-19 15:33:15,204 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.44603174603174606 [2024-02-19 15:33:15,205 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 442 predicate places. [2024-02-19 15:33:15,205 INFO L507 AbstractCegarLoop]: Abstraction has has 464 places, 4156 transitions, 201775 flow [2024-02-19 15:33:15,205 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:33:15,205 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:33:15,205 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:33:15,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-02-19 15:33:15,417 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:33:15,417 INFO L432 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:33:15,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:33:15,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1880044990, now seen corresponding path program 9 times [2024-02-19 15:33:15,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:33:15,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074079578] [2024-02-19 15:33:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:33:15,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:33:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:33:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:33:15,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:33:15,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074079578] [2024-02-19 15:33:15,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074079578] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:33:15,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688709913] [2024-02-19 15:33:15,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 15:33:15,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:33:15,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:33:15,572 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) [2024-02-19 15:33:15,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-02-19 15:33:15,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 15:33:15,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:33:15,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-19 15:33:15,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:33:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:33:15,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:33:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:33:15,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688709913] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:33:15,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:33:15,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-19 15:33:15,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859680580] [2024-02-19 15:33:15,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:33:15,971 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-19 15:33:15,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:33:15,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-19 15:33:15,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-02-19 15:33:15,974 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:33:15,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 4156 transitions, 201775 flow. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:33:15,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:33:15,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:33:15,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:33:30,209 INFO L124 PetriNetUnfolderBase]: 4794/9451 cut-off events. [2024-02-19 15:33:30,210 INFO L125 PetriNetUnfolderBase]: For 1853/1853 co-relation queries the response was YES. [2024-02-19 15:33:30,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235682 conditions, 9451 events. 4794/9451 cut-off events. For 1853/1853 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 81694 event pairs, 0 based on Foata normal form. 0/6814 useless extension candidates. Maximal degree in co-relation 97427. Up to 9242 conditions per place. [2024-02-19 15:33:30,288 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 1310 selfloop transitions, 485 changer transitions 3602/5398 dead transitions. [2024-02-19 15:33:30,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 5398 transitions, 272982 flow [2024-02-19 15:33:30,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-02-19 15:33:30,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-02-19 15:33:30,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 269 transitions. [2024-02-19 15:33:30,290 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.42698412698412697 [2024-02-19 15:33:30,291 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 471 predicate places. [2024-02-19 15:33:30,291 INFO L507 AbstractCegarLoop]: Abstraction has has 493 places, 5398 transitions, 272982 flow [2024-02-19 15:33:30,291 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:33:30,291 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:33:30,291 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:33:30,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-02-19 15:33:30,503 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:33:30,503 INFO L432 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:33:30,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:33:30,503 INFO L85 PathProgramCache]: Analyzing trace with hash 959668176, now seen corresponding path program 10 times [2024-02-19 15:33:30,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:33:30,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538302132] [2024-02-19 15:33:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:33:30,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:33:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:33:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:33:31,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:33:31,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538302132] [2024-02-19 15:33:31,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538302132] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:33:31,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316577602] [2024-02-19 15:33:31,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 15:33:31,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:33:31,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:33:31,022 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) [2024-02-19 15:33:31,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-02-19 15:33:31,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 15:33:31,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:33:31,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-19 15:33:31,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:33:31,428 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:33:31,428 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2024-02-19 15:33:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:33:31,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:33:31,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:33:31,639 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 182 [2024-02-19 15:33:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:33:32,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316577602] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:33:32,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:33:32,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 23 [2024-02-19 15:33:32,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808993273] [2024-02-19 15:33:32,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:33:32,032 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-19 15:33:32,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:33:32,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-19 15:33:32,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-02-19 15:33:32,040 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:33:32,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 5398 transitions, 272982 flow. Second operand has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 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) [2024-02-19 15:33:32,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:33:32,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:33:32,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:33:39,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-19 15:33:50,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-19 15:33:56,456 INFO L124 PetriNetUnfolderBase]: 5041/9881 cut-off events. [2024-02-19 15:33:56,458 INFO L125 PetriNetUnfolderBase]: For 1926/1926 co-relation queries the response was YES. [2024-02-19 15:33:56,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256209 conditions, 9881 events. 5041/9881 cut-off events. For 1926/1926 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 85500 event pairs, 0 based on Foata normal form. 2/7106 useless extension candidates. Maximal degree in co-relation 103172. Up to 9669 conditions per place. [2024-02-19 15:33:56,548 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 1393 selfloop transitions, 555 changer transitions 3687/5636 dead transitions. [2024-02-19 15:33:56,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 5636 transitions, 296262 flow [2024-02-19 15:33:56,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-02-19 15:33:56,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-02-19 15:33:56,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 255 transitions. [2024-02-19 15:33:56,551 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3794642857142857 [2024-02-19 15:33:56,555 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 502 predicate places. [2024-02-19 15:33:56,555 INFO L507 AbstractCegarLoop]: Abstraction has has 524 places, 5636 transitions, 296262 flow [2024-02-19 15:33:56,555 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 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) [2024-02-19 15:33:56,555 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:33:56,555 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:33:56,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-02-19 15:33:56,766 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-02-19 15:33:56,766 INFO L432 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:33:56,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:33:56,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1241338142, now seen corresponding path program 11 times [2024-02-19 15:33:56,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:33:56,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365538796] [2024-02-19 15:33:56,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:33:56,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:33:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:33:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:33:57,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:33:57,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365538796] [2024-02-19 15:33:57,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365538796] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:33:57,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899217151] [2024-02-19 15:33:57,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 15:33:57,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:33:57,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:33:57,516 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) [2024-02-19 15:33:57,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-02-19 15:33:57,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 15:33:57,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:33:57,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 31 conjunts are in the unsatisfiable core [2024-02-19 15:33:57,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:33:57,894 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:33:57,895 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2024-02-19 15:33:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:33:57,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:33:58,701 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 15:33:58,701 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 174 treesize of output 167 [2024-02-19 15:33:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:33:59,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899217151] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:33:59,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:33:59,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2024-02-19 15:33:59,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433832075] [2024-02-19 15:33:59,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:33:59,194 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-19 15:33:59,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:33:59,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-19 15:33:59,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2024-02-19 15:33:59,212 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:33:59,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 5636 transitions, 296262 flow. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:33:59,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:33:59,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:33:59,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:34:01,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-19 15:34:31,110 INFO L124 PetriNetUnfolderBase]: 5177/10201 cut-off events. [2024-02-19 15:34:31,110 INFO L125 PetriNetUnfolderBase]: For 1990/1990 co-relation queries the response was YES. [2024-02-19 15:34:31,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274607 conditions, 10201 events. 5177/10201 cut-off events. For 1990/1990 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 89497 event pairs, 0 based on Foata normal form. 4/7346 useless extension candidates. Maximal degree in co-relation 110058. Up to 9985 conditions per place. [2024-02-19 15:34:31,200 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 1902 selfloop transitions, 115 changer transitions 3823/5841 dead transitions. [2024-02-19 15:34:31,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 5841 transitions, 318743 flow [2024-02-19 15:34:31,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-19 15:34:31,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-19 15:34:31,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 243 transitions. [2024-02-19 15:34:31,202 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.413265306122449 [2024-02-19 15:34:31,202 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 529 predicate places. [2024-02-19 15:34:31,203 INFO L507 AbstractCegarLoop]: Abstraction has has 551 places, 5841 transitions, 318743 flow [2024-02-19 15:34:31,203 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:34:31,203 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:34:31,203 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:34:31,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-02-19 15:34:31,404 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-02-19 15:34:31,405 INFO L432 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:34:31,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:34:31,405 INFO L85 PathProgramCache]: Analyzing trace with hash 56544184, now seen corresponding path program 10 times [2024-02-19 15:34:31,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:34:31,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257190659] [2024-02-19 15:34:31,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:34:31,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:34:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:34:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:34:31,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:34:31,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257190659] [2024-02-19 15:34:31,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257190659] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:34:31,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948750724] [2024-02-19 15:34:31,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 15:34:31,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:34:31,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:34:31,516 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) [2024-02-19 15:34:31,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-02-19 15:34:31,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 15:34:31,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:34:31,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-19 15:34:31,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:34:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:34:31,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:34:31,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:34:31,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948750724] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:34:31,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:34:31,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-02-19 15:34:31,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555633168] [2024-02-19 15:34:31,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:34:31,819 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-19 15:34:31,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:34:31,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-19 15:34:31,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-02-19 15:34:31,827 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:34:31,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 5841 transitions, 318743 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:34:31,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:34:31,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:34:31,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:34:36,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-19 15:34:41,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-19 15:34:44,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-19 15:34:49,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-19 15:34:52,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-19 15:35:10,487 INFO L124 PetriNetUnfolderBase]: 5183/10257 cut-off events. [2024-02-19 15:35:10,488 INFO L125 PetriNetUnfolderBase]: For 2029/2029 co-relation queries the response was YES. [2024-02-19 15:35:10,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286372 conditions, 10257 events. 5183/10257 cut-off events. For 2029/2029 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 90545 event pairs, 0 based on Foata normal form. 0/7442 useless extension candidates. Maximal degree in co-relation 114668. Up to 10043 conditions per place. [2024-02-19 15:35:10,589 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1746 selfloop transitions, 282 changer transitions 3855/5884 dead transitions. [2024-02-19 15:35:10,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 5884 transitions, 332867 flow [2024-02-19 15:35:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-19 15:35:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-19 15:35:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 192 transitions. [2024-02-19 15:35:10,591 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-02-19 15:35:10,591 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 550 predicate places. [2024-02-19 15:35:10,591 INFO L507 AbstractCegarLoop]: Abstraction has has 572 places, 5884 transitions, 332867 flow [2024-02-19 15:35:10,591 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:35:10,592 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:35:10,592 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:35:10,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-02-19 15:35:10,803 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-02-19 15:35:10,803 INFO L432 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:35:10,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:35:10,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1047405758, now seen corresponding path program 11 times [2024-02-19 15:35:10,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:35:10,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822208303] [2024-02-19 15:35:10,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:35:10,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:35:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:35:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:35:10,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:35:10,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822208303] [2024-02-19 15:35:10,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822208303] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:35:10,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138590087] [2024-02-19 15:35:10,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 15:35:10,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:35:10,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:35:10,914 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) [2024-02-19 15:35:10,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-02-19 15:35:11,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 15:35:11,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:35:11,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-19 15:35:11,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:35:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:35:11,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:35:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:35:11,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138590087] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:35:11,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:35:11,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-02-19 15:35:11,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218895118] [2024-02-19 15:35:11,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:35:11,291 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-19 15:35:11,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:35:11,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-19 15:35:11,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-02-19 15:35:11,302 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:35:11,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 5884 transitions, 332867 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:35:11,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:35:11,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:35:11,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:35:16,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-19 15:35:35,675 INFO L124 PetriNetUnfolderBase]: 5368/10637 cut-off events. [2024-02-19 15:35:35,675 INFO L125 PetriNetUnfolderBase]: For 2079/2079 co-relation queries the response was YES. [2024-02-19 15:35:35,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307396 conditions, 10637 events. 5368/10637 cut-off events. For 2079/2079 co-relation queries the response was YES. Maximal size of possible extension queue 849. Compared 94542 event pairs, 0 based on Foata normal form. 0/7742 useless extension candidates. Maximal degree in co-relation 121201. Up to 10415 conditions per place. [2024-02-19 15:35:35,781 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1840 selfloop transitions, 348 changer transitions 3925/6114 dead transitions. [2024-02-19 15:35:35,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 594 places, 6114 transitions, 358090 flow [2024-02-19 15:35:35,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-19 15:35:35,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-19 15:35:35,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 209 transitions. [2024-02-19 15:35:35,783 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.432712215320911 [2024-02-19 15:35:35,783 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 572 predicate places. [2024-02-19 15:35:35,784 INFO L507 AbstractCegarLoop]: Abstraction has has 594 places, 6114 transitions, 358090 flow [2024-02-19 15:35:35,784 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:35:35,784 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:35:35,784 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:35:35,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-02-19 15:35:35,995 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:35:35,996 INFO L432 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:35:35,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:35:35,996 INFO L85 PathProgramCache]: Analyzing trace with hash 2061679239, now seen corresponding path program 2 times [2024-02-19 15:35:35,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:35:35,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989854202] [2024-02-19 15:35:35,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:35:35,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:35:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:35:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 15:35:36,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:35:36,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989854202] [2024-02-19 15:35:36,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989854202] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:35:36,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136168380] [2024-02-19 15:35:36,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 15:35:36,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:35:36,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:35:36,094 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) [2024-02-19 15:35:36,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-02-19 15:35:36,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 15:35:36,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:35:36,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-19 15:35:36,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:35:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 15:35:36,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:35:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-19 15:35:36,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136168380] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:35:36,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:35:36,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-19 15:35:36,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267688910] [2024-02-19 15:35:36,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:35:36,486 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 15:35:36,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:35:36,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 15:35:36,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-02-19 15:35:36,490 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:35:36,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 6114 transitions, 358090 flow. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:35:36,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:35:36,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:35:36,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:36:02,385 INFO L124 PetriNetUnfolderBase]: 5516/10903 cut-off events. [2024-02-19 15:36:02,385 INFO L125 PetriNetUnfolderBase]: For 2127/2127 co-relation queries the response was YES. [2024-02-19 15:36:02,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325997 conditions, 10903 events. 5516/10903 cut-off events. For 2127/2127 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 97209 event pairs, 0 based on Foata normal form. 0/7998 useless extension candidates. Maximal degree in co-relation 128138. Up to 10683 conditions per place. [2024-02-19 15:36:02,491 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 1748 selfloop transitions, 515 changer transitions 4001/6265 dead transitions. [2024-02-19 15:36:02,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 6265 transitions, 379424 flow [2024-02-19 15:36:02,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-19 15:36:02,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-19 15:36:02,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 221 transitions. [2024-02-19 15:36:02,492 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4575569358178054 [2024-02-19 15:36:02,498 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 593 predicate places. [2024-02-19 15:36:02,498 INFO L507 AbstractCegarLoop]: Abstraction has has 615 places, 6265 transitions, 379424 flow [2024-02-19 15:36:02,498 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:36:02,498 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:36:02,499 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:36:02,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-02-19 15:36:02,710 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-02-19 15:36:02,710 INFO L432 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:36:02,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:36:02,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1935545033, now seen corresponding path program 12 times [2024-02-19 15:36:02,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:36:02,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847574768] [2024-02-19 15:36:02,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:36:02,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:36:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:36:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:36:02,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:36:02,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847574768] [2024-02-19 15:36:02,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847574768] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:36:02,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905301691] [2024-02-19 15:36:02,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 15:36:02,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:36:02,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:36:02,888 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) [2024-02-19 15:36:02,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-02-19 15:36:03,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-19 15:36:03,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:36:03,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-19 15:36:03,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:36:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:36:03,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:36:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:36:03,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905301691] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:36:03,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:36:03,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-02-19 15:36:03,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391850236] [2024-02-19 15:36:03,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:36:03,150 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-19 15:36:03,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:36:03,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-19 15:36:03,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-02-19 15:36:03,152 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:36:03,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 6265 transitions, 379424 flow. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:36:03,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:36:03,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:36:03,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:36:43,044 INFO L124 PetriNetUnfolderBase]: 8100/16106 cut-off events. [2024-02-19 15:36:43,044 INFO L125 PetriNetUnfolderBase]: For 3067/3067 co-relation queries the response was YES. [2024-02-19 15:36:43,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497501 conditions, 16106 events. 8100/16106 cut-off events. For 3067/3067 co-relation queries the response was YES. Maximal size of possible extension queue 1027. Compared 149691 event pairs, 0 based on Foata normal form. 0/11663 useless extension candidates. Maximal degree in co-relation 213255. Up to 15846 conditions per place. [2024-02-19 15:36:43,217 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 2528 selfloop transitions, 378 changer transitions 6136/9043 dead transitions. [2024-02-19 15:36:43,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 9043 transitions, 565997 flow [2024-02-19 15:36:43,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-02-19 15:36:43,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-02-19 15:36:43,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 199 transitions. [2024-02-19 15:36:43,219 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-02-19 15:36:43,219 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 610 predicate places. [2024-02-19 15:36:43,219 INFO L507 AbstractCegarLoop]: Abstraction has has 632 places, 9043 transitions, 565997 flow [2024-02-19 15:36:43,219 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:36:43,219 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:36:43,219 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:36:43,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-02-19 15:36:43,428 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:36:43,428 INFO L432 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:36:43,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:36:43,429 INFO L85 PathProgramCache]: Analyzing trace with hash 128505588, now seen corresponding path program 3 times [2024-02-19 15:36:43,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:36:43,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011905131] [2024-02-19 15:36:43,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:36:43,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:36:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:36:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:36:43,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:36:43,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011905131] [2024-02-19 15:36:43,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011905131] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:36:43,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423012012] [2024-02-19 15:36:43,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 15:36:43,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:36:43,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:36:43,601 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) [2024-02-19 15:36:43,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-02-19 15:36:43,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 15:36:43,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:36:43,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2024-02-19 15:36:43,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:36:43,935 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 [2024-02-19 15:36:43,958 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 [2024-02-19 15:36:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:36:44,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:36:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:36:46,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423012012] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:36:46,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:36:46,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 23 [2024-02-19 15:36:46,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239109169] [2024-02-19 15:36:46,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:36:46,660 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-19 15:36:46,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:36:46,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-19 15:36:46,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-02-19 15:36:46,676 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:36:46,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 9043 transitions, 565997 flow. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:36:46,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:36:46,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:36:46,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:37:27,024 WARN L293 SmtUtils]: Spent 40.18s on a formula simplification. DAG size of input: 110 DAG size of output: 81 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-19 15:38:28,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-19 15:38:57,329 INFO L124 PetriNetUnfolderBase]: 8029/16145 cut-off events. [2024-02-19 15:38:57,329 INFO L125 PetriNetUnfolderBase]: For 3102/3102 co-relation queries the response was YES. [2024-02-19 15:38:57,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514676 conditions, 16145 events. 8029/16145 cut-off events. For 3102/3102 co-relation queries the response was YES. Maximal size of possible extension queue 1044. Compared 151915 event pairs, 0 based on Foata normal form. 3/11821 useless extension candidates. Maximal degree in co-relation 219972. Up to 15883 conditions per place. [2024-02-19 15:38:57,502 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 2125 selfloop transitions, 809 changer transitions 6284/9219 dead transitions. [2024-02-19 15:38:57,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 691 places, 9219 transitions, 595408 flow [2024-02-19 15:38:57,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-02-19 15:38:57,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2024-02-19 15:38:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 538 transitions. [2024-02-19 15:38:57,509 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.419984387197502 [2024-02-19 15:38:57,517 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 669 predicate places. [2024-02-19 15:38:57,517 INFO L507 AbstractCegarLoop]: Abstraction has has 691 places, 9219 transitions, 595408 flow [2024-02-19 15:38:57,517 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:38:57,517 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:38:57,517 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:38:57,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-02-19 15:38:57,729 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-02-19 15:38:57,729 INFO L432 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:38:57,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:38:57,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1755879022, now seen corresponding path program 4 times [2024-02-19 15:38:57,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:38:57,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679101850] [2024-02-19 15:38:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:38:57,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:38:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:38:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:38:58,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:38:58,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679101850] [2024-02-19 15:38:58,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679101850] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:38:58,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959053108] [2024-02-19 15:38:58,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 15:38:58,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:38:58,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:38:58,077 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) [2024-02-19 15:38:58,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-02-19 15:38:58,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 15:38:58,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:38:58,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-19 15:38:58,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:38:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:38:58,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:38:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:38:58,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959053108] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:38:58,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:38:58,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-02-19 15:38:58,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344072058] [2024-02-19 15:38:58,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:38:58,426 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 15:38:58,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:38:58,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 15:38:58,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-02-19 15:38:58,432 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:38:58,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 691 places, 9219 transitions, 595408 flow. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:38:58,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:38:58,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:38:58,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:40:04,565 INFO L124 PetriNetUnfolderBase]: 7947/15811 cut-off events. [2024-02-19 15:40:04,565 INFO L125 PetriNetUnfolderBase]: For 2980/2980 co-relation queries the response was YES. [2024-02-19 15:40:04,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519947 conditions, 15811 events. 7947/15811 cut-off events. For 2980/2980 co-relation queries the response was YES. Maximal size of possible extension queue 1006. Compared 146789 event pairs, 0 based on Foata normal form. 0/11554 useless extension candidates. Maximal degree in co-relation 223977. Up to 15560 conditions per place. [2024-02-19 15:40:04,735 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 2333 selfloop transitions, 520 changer transitions 6125/8979 dead transitions. [2024-02-19 15:40:04,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 705 places, 8979 transitions, 597740 flow [2024-02-19 15:40:04,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-19 15:40:04,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-19 15:40:04,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 152 transitions. [2024-02-19 15:40:04,737 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.48253968253968255 [2024-02-19 15:40:04,738 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 683 predicate places. [2024-02-19 15:40:04,738 INFO L507 AbstractCegarLoop]: Abstraction has has 705 places, 8979 transitions, 597740 flow [2024-02-19 15:40:04,739 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:40:04,739 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:40:04,739 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:40:04,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-02-19 15:40:04,951 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:40:04,951 INFO L432 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:40:04,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:40:04,951 INFO L85 PathProgramCache]: Analyzing trace with hash 822415313, now seen corresponding path program 13 times [2024-02-19 15:40:04,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:40:04,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918786011] [2024-02-19 15:40:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:40:04,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:40:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:40:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:40:05,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:40:05,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918786011] [2024-02-19 15:40:05,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918786011] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:40:05,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777221392] [2024-02-19 15:40:05,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 15:40:05,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:40:05,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:40:05,112 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) [2024-02-19 15:40:05,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-02-19 15:40:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:40:05,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-19 15:40:05,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:40:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:40:05,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:40:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:40:09,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777221392] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:40:09,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:40:09,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2024-02-19 15:40:09,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104992495] [2024-02-19 15:40:09,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:40:09,443 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-19 15:40:09,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:40:09,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-19 15:40:09,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=182, Unknown=1, NotChecked=0, Total=240 [2024-02-19 15:40:09,447 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:40:09,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 705 places, 8979 transitions, 597740 flow. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:40:09,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:40:09,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:40:09,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:41:19,143 INFO L124 PetriNetUnfolderBase]: 8345/16571 cut-off events. [2024-02-19 15:41:19,148 INFO L125 PetriNetUnfolderBase]: For 3105/3105 co-relation queries the response was YES. [2024-02-19 15:41:19,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 561244 conditions, 16571 events. 8345/16571 cut-off events. For 3105/3105 co-relation queries the response was YES. Maximal size of possible extension queue 1050. Compared 154421 event pairs, 0 based on Foata normal form. 0/12116 useless extension candidates. Maximal degree in co-relation 238212. Up to 16310 conditions per place. [2024-02-19 15:41:19,339 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 2667 selfloop transitions, 398 changer transitions 6303/9369 dead transitions. [2024-02-19 15:41:19,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 723 places, 9369 transitions, 642459 flow [2024-02-19 15:41:19,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-19 15:41:19,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-19 15:41:19,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 191 transitions. [2024-02-19 15:41:19,341 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.47869674185463656 [2024-02-19 15:41:19,341 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 701 predicate places. [2024-02-19 15:41:19,341 INFO L507 AbstractCegarLoop]: Abstraction has has 723 places, 9369 transitions, 642459 flow [2024-02-19 15:41:19,341 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:41:19,341 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:41:19,342 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:41:19,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-02-19 15:41:19,553 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:41:19,553 INFO L432 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:41:19,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:41:19,553 INFO L85 PathProgramCache]: Analyzing trace with hash -51325367, now seen corresponding path program 14 times [2024-02-19 15:41:19,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:41:19,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005716505] [2024-02-19 15:41:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:41:19,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:41:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:41:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:41:19,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:41:19,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005716505] [2024-02-19 15:41:19,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005716505] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:41:19,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37520448] [2024-02-19 15:41:19,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 15:41:19,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:41:19,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:41:19,656 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) [2024-02-19 15:41:19,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-02-19 15:41:19,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 15:41:19,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:41:19,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-19 15:41:19,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:41:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:41:19,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:41:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:41:19,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37520448] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:41:19,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:41:19,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-19 15:41:19,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773420199] [2024-02-19 15:41:19,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:41:19,960 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-19 15:41:19,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:41:19,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-19 15:41:19,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-02-19 15:41:19,963 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:41:19,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 723 places, 9369 transitions, 642459 flow. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:41:19,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:41:19,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:41:19,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:42:29,216 INFO L124 PetriNetUnfolderBase]: 8327/16503 cut-off events. [2024-02-19 15:42:29,217 INFO L125 PetriNetUnfolderBase]: For 3092/3092 co-relation queries the response was YES. [2024-02-19 15:42:29,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 575444 conditions, 16503 events. 8327/16503 cut-off events. For 3092/3092 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 153236 event pairs, 0 based on Foata normal form. 0/12066 useless extension candidates. Maximal degree in co-relation 244730. Up to 16246 conditions per place. [2024-02-19 15:42:29,405 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 2508 selfloop transitions, 623 changer transitions 6663/9795 dead transitions. [2024-02-19 15:42:29,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 744 places, 9795 transitions, 690979 flow [2024-02-19 15:42:29,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-19 15:42:29,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-19 15:42:29,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 225 transitions. [2024-02-19 15:42:29,406 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4658385093167702 [2024-02-19 15:42:29,406 INFO L308 CegarLoopForPetriNet]: 22 programPoint places, 722 predicate places. [2024-02-19 15:42:29,406 INFO L507 AbstractCegarLoop]: Abstraction has has 744 places, 9795 transitions, 690979 flow [2024-02-19 15:42:29,407 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:42:29,407 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:42:29,407 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:42:29,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-02-19 15:42:29,618 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:42:29,618 INFO L432 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:42:29,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:42:29,618 INFO L85 PathProgramCache]: Analyzing trace with hash -55142359, now seen corresponding path program 5 times [2024-02-19 15:42:29,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:42:29,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334901436] [2024-02-19 15:42:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:42:29,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:42:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:42:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:42:29,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:42:29,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334901436] [2024-02-19 15:42:29,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334901436] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:42:29,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144063645] [2024-02-19 15:42:29,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 15:42:29,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:42:29,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:42:29,732 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) [2024-02-19 15:42:29,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-02-19 15:42:29,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 15:42:29,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:42:29,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 54 conjunts are in the unsatisfiable core [2024-02-19 15:42:29,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:42:29,961 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 [2024-02-19 15:42:29,981 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 [2024-02-19 15:42:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:42:30,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:42:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:42:33,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144063645] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:42:33,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:42:33,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 25 [2024-02-19 15:42:33,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468074926] [2024-02-19 15:42:33,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:42:33,270 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-19 15:42:33,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:42:33,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-19 15:42:33,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2024-02-19 15:42:33,301 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-19 15:42:33,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 744 places, 9795 transitions, 690979 flow. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:42:33,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:42:33,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-19 15:42:33,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:43:14,297 WARN L293 SmtUtils]: Spent 40.73s on a formula simplification. DAG size of input: 173 DAG size of output: 123 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-19 15:43:43,529 WARN L293 SmtUtils]: Spent 28.58s on a formula simplification. DAG size of input: 147 DAG size of output: 104 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-19 15:43:53,244 WARN L293 SmtUtils]: Spent 9.56s on a formula simplification. DAG size of input: 149 DAG size of output: 103 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-19 15:43:54,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-19 15:44:17,543 WARN L293 SmtUtils]: Spent 21.72s on a formula simplification. DAG size of input: 121 DAG size of output: 84 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-19 15:44:34,342 WARN L293 SmtUtils]: Spent 15.01s on a formula simplification. DAG size of input: 123 DAG size of output: 86 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-19 15:44:35,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-19 15:44:36,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-19 15:44:40,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15