./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 2bf204635285748ea2bd88f763410b9afff54eeccde3aa0a970ff723633af9c2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:47:44,519 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:47:44,635 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:47:44,643 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:47:44,644 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:47:44,682 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:47:44,683 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:47:44,684 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:47:44,685 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:47:44,690 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:47:44,691 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:47:44,692 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:47:44,692 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:47:44,694 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:47:44,694 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:47:44,695 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:47:44,695 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:47:44,696 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:47:44,696 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:47:44,697 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:47:44,697 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:47:44,698 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:47:44,698 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:47:44,698 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:47:44,699 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:47:44,700 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:47:44,700 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:47:44,700 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:47:44,701 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:47:44,701 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:47:44,703 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:47:44,703 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:47:44,703 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:47:44,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:47:44,704 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:47:44,704 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:47:44,704 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:47:44,704 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:47:44,705 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:47:44,705 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2bf204635285748ea2bd88f763410b9afff54eeccde3aa0a970ff723633af9c2 [2023-11-06 22:47:44,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:47:45,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:47:45,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:47:45,017 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:47:45,018 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:47:45,021 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2023-11-06 22:47:48,215 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:47:48,427 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:47:48,427 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2023-11-06 22:47:48,436 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/data/0fff2f0f9/4d0757169c1d4d18a54ed4007e0d8294/FLAG9bd45ec31 [2023-11-06 22:47:48,772 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/data/0fff2f0f9/4d0757169c1d4d18a54ed4007e0d8294 [2023-11-06 22:47:48,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:47:48,775 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:47:48,777 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:47:48,777 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:47:48,784 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:47:48,785 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:48" (1/1) ... [2023-11-06 22:47:48,786 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d8c8ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:48, skipping insertion in model container [2023-11-06 22:47:48,786 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:48" (1/1) ... [2023-11-06 22:47:48,812 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:47:48,987 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c[2618,2631] [2023-11-06 22:47:48,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:47:49,005 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:47:49,028 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c[2618,2631] [2023-11-06 22:47:49,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:47:49,046 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:47:49,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:49 WrapperNode [2023-11-06 22:47:49,047 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:47:49,048 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:47:49,048 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:47:49,048 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:47:49,055 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:49" (1/1) ... [2023-11-06 22:47:49,065 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:49" (1/1) ... [2023-11-06 22:47:49,096 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 196 [2023-11-06 22:47:49,097 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:47:49,097 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:47:49,097 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:47:49,098 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:47:49,106 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:49" (1/1) ... [2023-11-06 22:47:49,107 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:49" (1/1) ... [2023-11-06 22:47:49,111 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:49" (1/1) ... [2023-11-06 22:47:49,112 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:49" (1/1) ... [2023-11-06 22:47:49,128 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:49" (1/1) ... [2023-11-06 22:47:49,142 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:49" (1/1) ... [2023-11-06 22:47:49,144 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:49" (1/1) ... [2023-11-06 22:47:49,146 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:49" (1/1) ... [2023-11-06 22:47:49,150 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:47:49,151 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:47:49,151 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:47:49,151 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:47:49,152 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:49" (1/1) ... [2023-11-06 22:47:49,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:47:49,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:47:49,187 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:47:49,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:47:49,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:47:49,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 22:47:49,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:47:49,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:47:49,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:47:49,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 22:47:49,229 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:47:49,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:47:49,230 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:47:49,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:47:49,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:47:49,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:47:49,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:47:49,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:47:49,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:47:49,233 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:47:49,350 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:47:49,351 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:47:49,846 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:47:49,858 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:47:49,858 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-06 22:47:49,861 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:49 BoogieIcfgContainer [2023-11-06 22:47:49,861 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:47:49,864 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:47:49,864 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:47:49,867 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:47:49,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:47:48" (1/3) ... [2023-11-06 22:47:49,868 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@698cda1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:49, skipping insertion in model container [2023-11-06 22:47:49,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:49" (2/3) ... [2023-11-06 22:47:49,869 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@698cda1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:49, skipping insertion in model container [2023-11-06 22:47:49,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:49" (3/3) ... [2023-11-06 22:47:49,870 INFO L112 eAbstractionObserver]: Analyzing ICFG loop-tiling-eq.wvr.c [2023-11-06 22:47:49,877 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:47:49,885 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:47:49,885 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:47:49,885 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:47:49,970 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:47:50,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 289 transitions, 592 flow [2023-11-06 22:47:50,159 INFO L124 PetriNetUnfolderBase]: 26/287 cut-off events. [2023-11-06 22:47:50,159 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:47:50,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 287 events. 26/287 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 295 event pairs, 0 based on Foata normal form. 0/260 useless extension candidates. Maximal degree in co-relation 217. Up to 2 conditions per place. [2023-11-06 22:47:50,166 INFO L82 GeneralOperation]: Start removeDead. Operand has 270 places, 289 transitions, 592 flow [2023-11-06 22:47:50,174 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 278 transitions, 568 flow [2023-11-06 22:47:50,178 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:47:50,188 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 259 places, 278 transitions, 568 flow [2023-11-06 22:47:50,191 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 259 places, 278 transitions, 568 flow [2023-11-06 22:47:50,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 278 transitions, 568 flow [2023-11-06 22:47:50,255 INFO L124 PetriNetUnfolderBase]: 26/278 cut-off events. [2023-11-06 22:47:50,255 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:47:50,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 278 events. 26/278 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 293 event pairs, 0 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 217. Up to 2 conditions per place. [2023-11-06 22:47:50,259 INFO L119 LiptonReduction]: Number of co-enabled transitions 1108 [2023-11-06 22:48:09,978 INFO L134 LiptonReduction]: Checked pairs total: 1598 [2023-11-06 22:48:09,978 INFO L136 LiptonReduction]: Total number of compositions: 315 [2023-11-06 22:48:09,994 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:48:10,001 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2066b3e3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:48:10,001 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:48:10,009 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:48:10,009 INFO L124 PetriNetUnfolderBase]: 7/27 cut-off events. [2023-11-06 22:48:10,009 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:48:10,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:10,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:10,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:48:10,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:10,015 INFO L85 PathProgramCache]: Analyzing trace with hash -866075484, now seen corresponding path program 1 times [2023-11-06 22:48:10,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:10,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016462864] [2023-11-06 22:48:10,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:10,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:10,117 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:48:10,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146534596] [2023-11-06 22:48:10,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:10,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:10,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:10,122 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:10,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:48:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:10,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:48:10,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:10,365 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:48:10,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:10,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016462864] [2023-11-06 22:48:10,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:48:10,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146534596] [2023-11-06 22:48:10,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146534596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:48:10,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:48:10,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:48:10,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009276190] [2023-11-06 22:48:10,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:48:10,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:48:10,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:10,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:48:10,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:48:10,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 604 [2023-11-06 22:48:10,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 259.5) internal successors, (1038), 4 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:10,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:10,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 604 [2023-11-06 22:48:10,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:10,735 INFO L124 PetriNetUnfolderBase]: 205/348 cut-off events. [2023-11-06 22:48:10,736 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-06 22:48:10,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 348 events. 205/348 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1317 event pairs, 100 based on Foata normal form. 1/243 useless extension candidates. Maximal degree in co-relation 278. Up to 166 conditions per place. [2023-11-06 22:48:10,743 INFO L140 encePairwiseOnDemand]: 600/604 looper letters, 26 selfloop transitions, 2 changer transitions 16/47 dead transitions. [2023-11-06 22:48:10,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 47 transitions, 206 flow [2023-11-06 22:48:10,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:48:10,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:48:10,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1069 transitions. [2023-11-06 22:48:10,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44246688741721857 [2023-11-06 22:48:10,770 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1069 transitions. [2023-11-06 22:48:10,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1069 transitions. [2023-11-06 22:48:10,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:10,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1069 transitions. [2023-11-06 22:48:10,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 267.25) internal successors, (1069), 4 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:10,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 604.0) internal successors, (3020), 5 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:10,800 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 604.0) internal successors, (3020), 5 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:10,802 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 68 flow. Second operand 4 states and 1069 transitions. [2023-11-06 22:48:10,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 47 transitions, 206 flow [2023-11-06 22:48:10,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 47 transitions, 190 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:48:10,808 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 74 flow [2023-11-06 22:48:10,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=604, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2023-11-06 22:48:10,814 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2023-11-06 22:48:10,814 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 74 flow [2023-11-06 22:48:10,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 259.5) internal successors, (1038), 4 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:10,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:10,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:10,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:11,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:48:11,022 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:48:11,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:11,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1209768675, now seen corresponding path program 1 times [2023-11-06 22:48:11,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:11,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518233604] [2023-11-06 22:48:11,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:11,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:11,057 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:48:11,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342448588] [2023-11-06 22:48:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:11,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:11,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:11,064 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:11,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:48:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:11,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:48:11,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:11,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:11,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:11,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:11,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:11,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518233604] [2023-11-06 22:48:11,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:48:11,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342448588] [2023-11-06 22:48:11,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342448588] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:11,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:48:11,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-11-06 22:48:11,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853702820] [2023-11-06 22:48:11,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:11,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:48:11,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:11,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:48:11,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:48:11,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 604 [2023-11-06 22:48:11,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 74 flow. Second operand has 6 states, 6 states have (on average 254.16666666666666) internal successors, (1525), 6 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:11,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:11,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 604 [2023-11-06 22:48:11,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:11,722 INFO L124 PetriNetUnfolderBase]: 162/279 cut-off events. [2023-11-06 22:48:11,722 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:48:11,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 279 events. 162/279 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 954 event pairs, 32 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 545. Up to 97 conditions per place. [2023-11-06 22:48:11,726 INFO L140 encePairwiseOnDemand]: 597/604 looper letters, 37 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2023-11-06 22:48:11,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 46 transitions, 198 flow [2023-11-06 22:48:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:48:11,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:48:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1801 transitions. [2023-11-06 22:48:11,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4259697256385998 [2023-11-06 22:48:11,734 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1801 transitions. [2023-11-06 22:48:11,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1801 transitions. [2023-11-06 22:48:11,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:11,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1801 transitions. [2023-11-06 22:48:11,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 257.2857142857143) internal successors, (1801), 7 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:11,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 604.0) internal successors, (4832), 8 states have internal predecessors, (4832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:11,759 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 604.0) internal successors, (4832), 8 states have internal predecessors, (4832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:11,759 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 74 flow. Second operand 7 states and 1801 transitions. [2023-11-06 22:48:11,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 46 transitions, 198 flow [2023-11-06 22:48:11,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 46 transitions, 194 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-06 22:48:11,762 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 105 flow [2023-11-06 22:48:11,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=604, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=105, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-11-06 22:48:11,763 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 7 predicate places. [2023-11-06 22:48:11,763 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 105 flow [2023-11-06 22:48:11,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 254.16666666666666) internal successors, (1525), 6 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:11,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:11,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:11,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:11,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 22:48:11,976 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:48:11,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:11,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1518900587, now seen corresponding path program 1 times [2023-11-06 22:48:11,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:11,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721960340] [2023-11-06 22:48:11,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:11,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:11,994 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:48:11,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564921526] [2023-11-06 22:48:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:11,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:11,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:11,996 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:12,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:48:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:12,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:48:12,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:48:12,191 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:48:12,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:12,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721960340] [2023-11-06 22:48:12,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:48:12,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564921526] [2023-11-06 22:48:12,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564921526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:48:12,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:48:12,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:48:12,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490473587] [2023-11-06 22:48:12,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:48:12,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:48:12,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:12,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:48:12,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:48:12,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 604 [2023-11-06 22:48:12,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 249.5) internal successors, (998), 4 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:12,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:12,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 604 [2023-11-06 22:48:12,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:12,529 INFO L124 PetriNetUnfolderBase]: 291/503 cut-off events. [2023-11-06 22:48:12,530 INFO L125 PetriNetUnfolderBase]: For 90/116 co-relation queries the response was YES. [2023-11-06 22:48:12,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 503 events. 291/503 cut-off events. For 90/116 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2078 event pairs, 160 based on Foata normal form. 27/465 useless extension candidates. Maximal degree in co-relation 1100. Up to 233 conditions per place. [2023-11-06 22:48:12,538 INFO L140 encePairwiseOnDemand]: 600/604 looper letters, 27 selfloop transitions, 3 changer transitions 25/58 dead transitions. [2023-11-06 22:48:12,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 58 transitions, 300 flow [2023-11-06 22:48:12,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:48:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:48:12,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1274 transitions. [2023-11-06 22:48:12,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42185430463576157 [2023-11-06 22:48:12,545 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1274 transitions. [2023-11-06 22:48:12,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1274 transitions. [2023-11-06 22:48:12,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:12,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1274 transitions. [2023-11-06 22:48:12,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 254.8) internal successors, (1274), 5 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:12,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 604.0) internal successors, (3624), 6 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:12,562 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 604.0) internal successors, (3624), 6 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:12,563 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 105 flow. Second operand 5 states and 1274 transitions. [2023-11-06 22:48:12,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 58 transitions, 300 flow [2023-11-06 22:48:12,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 58 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:48:12,569 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 127 flow [2023-11-06 22:48:12,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=604, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-11-06 22:48:12,571 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 13 predicate places. [2023-11-06 22:48:12,572 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 127 flow [2023-11-06 22:48:12,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 249.5) internal successors, (998), 4 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:12,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:12,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:12,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:12,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:12,780 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:48:12,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:12,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1849471265, now seen corresponding path program 1 times [2023-11-06 22:48:12,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:12,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477405177] [2023-11-06 22:48:12,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:12,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:12,798 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:48:12,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356450667] [2023-11-06 22:48:12,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:12,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:12,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:12,800 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:12,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:48:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:12,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:48:12,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:12,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:13,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:13,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477405177] [2023-11-06 22:48:13,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:48:13,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356450667] [2023-11-06 22:48:13,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356450667] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:13,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:48:13,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-06 22:48:13,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010146093] [2023-11-06 22:48:13,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:48:13,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:48:13,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:13,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:48:13,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:48:13,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 604 [2023-11-06 22:48:13,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 237.8) internal successors, (1189), 5 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:13,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:13,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 604 [2023-11-06 22:48:13,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:13,486 INFO L124 PetriNetUnfolderBase]: 180/316 cut-off events. [2023-11-06 22:48:13,486 INFO L125 PetriNetUnfolderBase]: For 57/69 co-relation queries the response was YES. [2023-11-06 22:48:13,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 729 conditions, 316 events. 180/316 cut-off events. For 57/69 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 983 event pairs, 56 based on Foata normal form. 32/306 useless extension candidates. Maximal degree in co-relation 716. Up to 163 conditions per place. [2023-11-06 22:48:13,490 INFO L140 encePairwiseOnDemand]: 595/604 looper letters, 34 selfloop transitions, 9 changer transitions 0/46 dead transitions. [2023-11-06 22:48:13,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 46 transitions, 253 flow [2023-11-06 22:48:13,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:48:13,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:48:13,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1209 transitions. [2023-11-06 22:48:13,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40033112582781455 [2023-11-06 22:48:13,497 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1209 transitions. [2023-11-06 22:48:13,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1209 transitions. [2023-11-06 22:48:13,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:13,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1209 transitions. [2023-11-06 22:48:13,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 241.8) internal successors, (1209), 5 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:13,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 604.0) internal successors, (3624), 6 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:13,514 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 604.0) internal successors, (3624), 6 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:13,514 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 127 flow. Second operand 5 states and 1209 transitions. [2023-11-06 22:48:13,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 46 transitions, 253 flow [2023-11-06 22:48:13,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 238 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-06 22:48:13,518 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 181 flow [2023-11-06 22:48:13,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=604, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-11-06 22:48:13,519 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 16 predicate places. [2023-11-06 22:48:13,520 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 181 flow [2023-11-06 22:48:13,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 237.8) internal successors, (1189), 5 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:13,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:13,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:13,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 22:48:13,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:13,727 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:48:13,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:13,728 INFO L85 PathProgramCache]: Analyzing trace with hash -957044106, now seen corresponding path program 1 times [2023-11-06 22:48:13,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:13,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481753470] [2023-11-06 22:48:13,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:13,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:13,749 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:48:13,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747971386] [2023-11-06 22:48:13,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:13,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:13,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:13,751 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:13,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:48:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:14,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:48:14,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:48:14,384 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:48:14,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:14,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481753470] [2023-11-06 22:48:14,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:48:14,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747971386] [2023-11-06 22:48:14,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747971386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:48:14,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:48:14,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:48:14,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057312688] [2023-11-06 22:48:14,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:48:14,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:48:14,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:14,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:48:14,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:48:15,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 604 [2023-11-06 22:48:15,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 238.5) internal successors, (1431), 6 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:15,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:15,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 604 [2023-11-06 22:48:15,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:15,731 INFO L124 PetriNetUnfolderBase]: 180/315 cut-off events. [2023-11-06 22:48:15,731 INFO L125 PetriNetUnfolderBase]: For 171/183 co-relation queries the response was YES. [2023-11-06 22:48:15,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 315 events. 180/315 cut-off events. For 171/183 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 980 event pairs, 104 based on Foata normal form. 13/286 useless extension candidates. Maximal degree in co-relation 835. Up to 287 conditions per place. [2023-11-06 22:48:15,735 INFO L140 encePairwiseOnDemand]: 597/604 looper letters, 30 selfloop transitions, 2 changer transitions 6/41 dead transitions. [2023-11-06 22:48:15,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 41 transitions, 267 flow [2023-11-06 22:48:15,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:48:15,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:48:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1678 transitions. [2023-11-06 22:48:15,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968779564806055 [2023-11-06 22:48:15,743 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1678 transitions. [2023-11-06 22:48:15,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1678 transitions. [2023-11-06 22:48:15,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:15,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1678 transitions. [2023-11-06 22:48:15,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 239.71428571428572) internal successors, (1678), 7 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:15,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 604.0) internal successors, (4832), 8 states have internal predecessors, (4832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:15,760 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 604.0) internal successors, (4832), 8 states have internal predecessors, (4832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:15,760 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 181 flow. Second operand 7 states and 1678 transitions. [2023-11-06 22:48:15,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 41 transitions, 267 flow [2023-11-06 22:48:15,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 41 transitions, 263 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:48:15,764 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 164 flow [2023-11-06 22:48:15,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=604, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=164, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2023-11-06 22:48:15,766 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2023-11-06 22:48:15,766 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 164 flow [2023-11-06 22:48:15,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 238.5) internal successors, (1431), 6 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:15,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:15,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:15,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:15,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:15,974 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:48:15,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:15,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1794092777, now seen corresponding path program 1 times [2023-11-06 22:48:15,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:15,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897199379] [2023-11-06 22:48:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:15,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:15,998 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:48:15,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604482434] [2023-11-06 22:48:15,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:15,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:15,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:16,000 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:16,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:48:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:16,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:48:16,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:48:16,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:48:16,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:16,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897199379] [2023-11-06 22:48:16,223 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:48:16,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604482434] [2023-11-06 22:48:16,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604482434] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:16,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:48:16,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-06 22:48:16,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909418000] [2023-11-06 22:48:16,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:48:16,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:48:16,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:16,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:48:16,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:48:16,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 604 [2023-11-06 22:48:16,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 243.4) internal successors, (1217), 5 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:16,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:16,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 604 [2023-11-06 22:48:16,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:16,488 INFO L124 PetriNetUnfolderBase]: 178/310 cut-off events. [2023-11-06 22:48:16,489 INFO L125 PetriNetUnfolderBase]: For 134/146 co-relation queries the response was YES. [2023-11-06 22:48:16,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 310 events. 178/310 cut-off events. For 134/146 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 972 event pairs, 104 based on Foata normal form. 13/281 useless extension candidates. Maximal degree in co-relation 819. Up to 286 conditions per place. [2023-11-06 22:48:16,493 INFO L140 encePairwiseOnDemand]: 599/604 looper letters, 29 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2023-11-06 22:48:16,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 36 transitions, 234 flow [2023-11-06 22:48:16,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:48:16,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:48:16,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1223 transitions. [2023-11-06 22:48:16,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40496688741721854 [2023-11-06 22:48:16,499 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1223 transitions. [2023-11-06 22:48:16,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1223 transitions. [2023-11-06 22:48:16,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:16,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1223 transitions. [2023-11-06 22:48:16,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 244.6) internal successors, (1223), 5 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:16,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 604.0) internal successors, (3624), 6 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:16,513 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 604.0) internal successors, (3624), 6 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:16,513 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 164 flow. Second operand 5 states and 1223 transitions. [2023-11-06 22:48:16,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 36 transitions, 234 flow [2023-11-06 22:48:16,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 36 transitions, 214 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-11-06 22:48:16,517 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 162 flow [2023-11-06 22:48:16,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=604, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2023-11-06 22:48:16,518 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 18 predicate places. [2023-11-06 22:48:16,518 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 162 flow [2023-11-06 22:48:16,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 243.4) internal successors, (1217), 5 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:16,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:16,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:16,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:16,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:16,727 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:48:16,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:16,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1173713331, now seen corresponding path program 1 times [2023-11-06 22:48:16,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:16,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033705404] [2023-11-06 22:48:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:16,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:16,752 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:48:16,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894032372] [2023-11-06 22:48:16,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:16,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:16,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:16,755 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:16,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:48:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:16,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:48:16,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 22:48:16,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 22:48:17,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:17,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033705404] [2023-11-06 22:48:17,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:48:17,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894032372] [2023-11-06 22:48:17,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894032372] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:17,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:48:17,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-06 22:48:17,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690262241] [2023-11-06 22:48:17,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:48:17,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:48:17,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:17,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:48:17,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:48:17,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 604 [2023-11-06 22:48:17,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 238.8) internal successors, (1194), 5 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:17,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:17,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 604 [2023-11-06 22:48:17,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:17,335 INFO L124 PetriNetUnfolderBase]: 193/348 cut-off events. [2023-11-06 22:48:17,335 INFO L125 PetriNetUnfolderBase]: For 155/173 co-relation queries the response was YES. [2023-11-06 22:48:17,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 348 events. 193/348 cut-off events. For 155/173 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1060 event pairs, 74 based on Foata normal form. 18/346 useless extension candidates. Maximal degree in co-relation 921. Up to 197 conditions per place. [2023-11-06 22:48:17,338 INFO L140 encePairwiseOnDemand]: 598/604 looper letters, 41 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-11-06 22:48:17,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 311 flow [2023-11-06 22:48:17,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:48:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:48:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1207 transitions. [2023-11-06 22:48:17,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39966887417218544 [2023-11-06 22:48:17,345 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1207 transitions. [2023-11-06 22:48:17,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1207 transitions. [2023-11-06 22:48:17,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:17,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1207 transitions. [2023-11-06 22:48:17,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 241.4) internal successors, (1207), 5 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:17,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 604.0) internal successors, (3624), 6 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:17,357 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 604.0) internal successors, (3624), 6 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:17,357 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 162 flow. Second operand 5 states and 1207 transitions. [2023-11-06 22:48:17,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 311 flow [2023-11-06 22:48:17,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 306 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-06 22:48:17,360 INFO L231 Difference]: Finished difference. Result has 50 places, 37 transitions, 180 flow [2023-11-06 22:48:17,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=604, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=50, PETRI_TRANSITIONS=37} [2023-11-06 22:48:17,361 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2023-11-06 22:48:17,362 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 37 transitions, 180 flow [2023-11-06 22:48:17,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 238.8) internal successors, (1194), 5 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:17,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:17,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:17,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:17,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:17,569 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:48:17,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:17,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2006812142, now seen corresponding path program 1 times [2023-11-06 22:48:17,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:17,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266145394] [2023-11-06 22:48:17,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:17,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:17,598 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:48:17,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622981644] [2023-11-06 22:48:17,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:17,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:17,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:17,600 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:17,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:48:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:17,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-06 22:48:17,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:18,005 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:48:18,021 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:48:18,042 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:48:18,052 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-11-06 22:48:18,070 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:48:18,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:48:18,078 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:48:18,137 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-06 22:48:18,138 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-06 22:48:18,204 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 22:48:18,204 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-06 22:48:18,280 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-06 22:48:18,281 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-06 22:48:18,452 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2023-11-06 22:48:18,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:48:18,521 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-11-06 22:48:18,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:48:18,629 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-11-06 22:48:19,023 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-11-06 22:48:19,049 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-11-06 22:48:19,450 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 22:48:19,451 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 67 [2023-11-06 22:48:19,478 INFO L322 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2023-11-06 22:48:19,478 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 33 [2023-11-06 22:48:19,493 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 40 [2023-11-06 22:48:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:48:19,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:20,881 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:48:20,882 INFO L351 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 322 treesize of output 290 [2023-11-06 22:48:20,896 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 143 treesize of output 137 [2023-11-06 22:48:38,884 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (+ (* (* c_thread2Thread1of1ForFork1_~i~1 c_~M~0) 4) c_~F~0.offset)) (.cse6 (select |c_#memory_int| c_~A~0.base)) (.cse7 (* c_thread1Thread1of1ForFork0_~i~0 4)) (.cse8 (+ (* c_thread2Thread1of1ForFork1_~i~1 4) c_~B~0.offset))) (and (forall ((~A~0.offset Int) (v_ArrVal_653 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.base| c_~A~0.base v_ArrVal_653))) (let ((.cse2 (select (select .cse1 c_~B~0.base) .cse8))) (or (forall ((v_ArrVal_657 (Array Int Int)) (v_~a~0_56 Int) (v_arrayElimCell_18 Int) (v_~b~0_60 Int) (v_arrayElimCell_16 Int)) (or (< c_~N~0 (+ v_~a~0_56 1)) (let ((.cse0 (let ((.cse4 (store |c_#memory_int| c_~A~0.base (store .cse6 (+ ~A~0.offset .cse7) |c_thread1Thread1of1ForFork0_#t~mem2|)))) (store .cse4 .cse2 (store (select .cse4 .cse2) v_arrayElimCell_16 (select (select .cse4 c_~F~0.base) .cse5))))) (.cse3 (* v_~b~0_60 4))) (= (select (select .cse0 (select (select (store .cse1 .cse2 v_ArrVal_657) c_~B~0.base) (+ (* v_~a~0_56 4) c_~B~0.offset))) (+ .cse3 v_arrayElimCell_18)) (select (select .cse0 c_~A~0.base) (+ (* (* v_~a~0_56 c_~M~0) 4) .cse3 ~A~0.offset)))) (< c_~M~0 (+ v_~b~0_60 1)) (< v_~b~0_60 0) (= v_~a~0_56 c_thread2Thread1of1ForFork1_~i~1) (< v_~a~0_56 0))) (not (= c_~B~0.base .cse2)))))) (forall ((~A~0.offset Int) (v_~b~0_60 Int) (v_ArrVal_653 (Array Int Int))) (or (< c_~M~0 (+ v_~b~0_60 1)) (< v_~b~0_60 0) (forall ((v_~a~0_56 Int)) (or (< c_~N~0 (+ v_~a~0_56 1)) (forall ((v_ArrVal_657 (Array Int Int)) (v_arrayElimCell_17 Int)) (let ((.cse13 (store |c_#memory_$Pointer$.base| c_~A~0.base v_ArrVal_653))) (let ((.cse14 (select (select .cse13 c_~B~0.base) .cse8))) (let ((.cse10 (* v_~b~0_60 4)) (.cse12 (let ((.cse15 (store |c_#memory_int| c_~A~0.base (store .cse6 (+ ~A~0.offset .cse7) |c_thread1Thread1of1ForFork0_#t~mem2|)))) (store .cse15 .cse14 (store (select .cse15 .cse14) v_arrayElimCell_17 (select (select .cse15 c_~F~0.base) .cse5)))))) (let ((.cse9 (select .cse12 (select (select (store .cse13 .cse14 v_ArrVal_657) c_~B~0.base) (+ (* v_~a~0_56 4) c_~B~0.offset)))) (.cse11 (select (select .cse12 c_~A~0.base) (+ (* (* v_~a~0_56 c_~M~0) 4) .cse10 ~A~0.offset)))) (or (forall ((v_arrayElimCell_18 Int)) (= (select .cse9 (+ .cse10 v_arrayElimCell_18)) .cse11)) (= (select .cse9 (+ .cse10 v_arrayElimCell_17)) .cse11))))))) (< v_~a~0_56 0))))) (forall ((~A~0.offset Int) (v_~b~0_60 Int) (v_ArrVal_653 (Array Int Int))) (or (< c_~M~0 (+ v_~b~0_60 1)) (< v_~b~0_60 0) (forall ((v_~a~0_56 Int)) (or (< c_~N~0 (+ v_~a~0_56 1)) (forall ((v_ArrVal_657 (Array Int Int)) (v_arrayElimCell_17 Int) (v_arrayElimCell_16 Int)) (let ((.cse20 (store |c_#memory_$Pointer$.base| c_~A~0.base v_ArrVal_653))) (let ((.cse21 (select (select .cse20 c_~B~0.base) .cse8))) (let ((.cse17 (* v_~b~0_60 4)) (.cse19 (let ((.cse22 (store |c_#memory_int| c_~A~0.base (store .cse6 (+ ~A~0.offset .cse7) |c_thread1Thread1of1ForFork0_#t~mem2|)))) (store .cse22 .cse21 (store (select .cse22 .cse21) v_arrayElimCell_16 (select (select .cse22 c_~F~0.base) .cse5)))))) (let ((.cse16 (select .cse19 (select (select (store .cse20 .cse21 v_ArrVal_657) c_~B~0.base) (+ (* v_~a~0_56 4) c_~B~0.offset)))) (.cse18 (select (select .cse19 c_~A~0.base) (+ (* (* v_~a~0_56 c_~M~0) 4) .cse17 ~A~0.offset)))) (or (= (select .cse16 (+ .cse17 v_arrayElimCell_17)) .cse18) (forall ((v_arrayElimCell_18 Int)) (= (select .cse16 (+ .cse17 v_arrayElimCell_18)) .cse18)))))))) (= v_~a~0_56 c_thread2Thread1of1ForFork1_~i~1) (< v_~a~0_56 0))))) (forall ((~A~0.offset Int) (v_ArrVal_653 (Array Int Int))) (let ((.cse25 (store |c_#memory_$Pointer$.base| c_~A~0.base v_ArrVal_653))) (let ((.cse23 (select (select .cse25 c_~B~0.base) .cse8))) (or (= c_~B~0.base .cse23) (forall ((v_ArrVal_657 (Array Int Int)) (v_~a~0_56 Int) (v_arrayElimCell_17 Int) (v_~b~0_60 Int)) (or (< c_~N~0 (+ v_~a~0_56 1)) (let ((.cse24 (let ((.cse27 (store |c_#memory_int| c_~A~0.base (store .cse6 (+ ~A~0.offset .cse7) |c_thread1Thread1of1ForFork0_#t~mem2|)))) (store .cse27 .cse23 (store (select .cse27 .cse23) v_arrayElimCell_17 (select (select .cse27 c_~F~0.base) .cse5))))) (.cse26 (* v_~b~0_60 4))) (= (select (select .cse24 (select (select (store .cse25 .cse23 v_ArrVal_657) c_~B~0.base) (+ (* v_~a~0_56 4) c_~B~0.offset))) (+ .cse26 v_arrayElimCell_17)) (select (select .cse24 c_~A~0.base) (+ (* (* v_~a~0_56 c_~M~0) 4) .cse26 ~A~0.offset)))) (< c_~M~0 (+ v_~b~0_60 1)) (< v_~b~0_60 0) (< v_~a~0_56 0))))))) (forall ((~A~0.offset Int) (v_ArrVal_653 (Array Int Int))) (let ((.cse30 (store |c_#memory_$Pointer$.base| c_~A~0.base v_ArrVal_653))) (let ((.cse28 (select (select .cse30 c_~B~0.base) .cse8))) (or (= c_~B~0.base .cse28) (forall ((v_ArrVal_657 (Array Int Int)) (v_~a~0_56 Int) (v_arrayElimCell_17 Int) (v_~b~0_60 Int) (v_arrayElimCell_16 Int)) (or (< c_~N~0 (+ v_~a~0_56 1)) (< c_~M~0 (+ v_~b~0_60 1)) (< v_~b~0_60 0) (let ((.cse29 (let ((.cse32 (store |c_#memory_int| c_~A~0.base (store .cse6 (+ ~A~0.offset .cse7) |c_thread1Thread1of1ForFork0_#t~mem2|)))) (store .cse32 .cse28 (store (select .cse32 .cse28) v_arrayElimCell_16 (select (select .cse32 c_~F~0.base) .cse5))))) (.cse31 (* v_~b~0_60 4))) (= (select (select .cse29 (select (select (store .cse30 .cse28 v_ArrVal_657) c_~B~0.base) (+ (* v_~a~0_56 4) c_~B~0.offset))) (+ .cse31 v_arrayElimCell_17)) (select (select .cse29 c_~A~0.base) (+ (* (* v_~a~0_56 c_~M~0) 4) .cse31 ~A~0.offset)))) (= v_~a~0_56 c_thread2Thread1of1ForFork1_~i~1) (< v_~a~0_56 0))))))) (forall ((~A~0.offset Int) (v_ArrVal_653 (Array Int Int))) (let ((.cse34 (store |c_#memory_$Pointer$.base| c_~A~0.base v_ArrVal_653))) (let ((.cse35 (select (select .cse34 c_~B~0.base) .cse8))) (or (forall ((v_ArrVal_657 (Array Int Int)) (v_~a~0_56 Int) (v_arrayElimCell_18 Int) (v_arrayElimCell_17 Int) (v_~b~0_60 Int)) (or (< c_~N~0 (+ v_~a~0_56 1)) (< c_~M~0 (+ v_~b~0_60 1)) (< v_~b~0_60 0) (let ((.cse33 (let ((.cse37 (store |c_#memory_int| c_~A~0.base (store .cse6 (+ ~A~0.offset .cse7) |c_thread1Thread1of1ForFork0_#t~mem2|)))) (store .cse37 .cse35 (store (select .cse37 .cse35) v_arrayElimCell_17 (select (select .cse37 c_~F~0.base) .cse5))))) (.cse36 (* v_~b~0_60 4))) (= (select (select .cse33 (select (select (store .cse34 .cse35 v_ArrVal_657) c_~B~0.base) (+ (* v_~a~0_56 4) c_~B~0.offset))) (+ .cse36 v_arrayElimCell_18)) (select (select .cse33 c_~A~0.base) (+ (* (* v_~a~0_56 c_~M~0) 4) .cse36 ~A~0.offset)))) (< v_~a~0_56 0))) (not (= c_~B~0.base .cse35)))))))) is different from false [2023-11-06 22:48:39,572 INFO L322 Elim1Store]: treesize reduction 4, result has 97.9 percent of original size [2023-11-06 22:48:39,573 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 5342 treesize of output 3818 [2023-11-06 22:48:48,854 INFO L322 Elim1Store]: treesize reduction 8, result has 97.6 percent of original size [2023-11-06 22:48:48,855 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 16163 treesize of output 12999 [2023-11-06 22:49:12,234 INFO L322 Elim1Store]: treesize reduction 4, result has 97.9 percent of original size [2023-11-06 22:49:12,235 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2636 treesize of output 1968 [2023-11-06 22:49:16,961 INFO L322 Elim1Store]: treesize reduction 8, result has 97.6 percent of original size [2023-11-06 22:49:16,962 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 6303 treesize of output 5335 [2023-11-06 22:49:40,967 INFO L322 Elim1Store]: treesize reduction 51, result has 73.6 percent of original size [2023-11-06 22:49:40,968 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3956 treesize of output 3225 [2023-11-06 22:49:44,027 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:49:44,033 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 22:49:51,893 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:49:51,893 INFO L351 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 462 treesize of output 307 [2023-11-06 22:49:52,132 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:49:52,135 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 318642 treesize of output 305810 [2023-11-06 22:49:53,612 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7169 treesize of output 6833 [2023-11-06 22:49:53,836 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:49:53,837 INFO L351 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 6833 treesize of output 6666 [2023-11-06 22:49:54,048 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:49:54,049 INFO L351 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 6657 treesize of output 6346 [2023-11-06 22:49:54,215 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:49:54,216 INFO L351 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 6337 treesize of output 6274 [2023-11-06 22:49:54,353 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6265 treesize of output 6073 [2023-11-06 22:49:54,532 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:49:54,533 INFO L351 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 6073 treesize of output 5954 [2023-11-06 22:49:54,680 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5945 treesize of output 5753 [2023-11-06 22:49:54,851 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:49:54,852 INFO L351 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 5753 treesize of output 5650 [2023-11-06 22:49:55,045 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:49:55,046 INFO L351 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 5641 treesize of output 5594 [2023-11-06 22:49:55,220 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:49:55,222 INFO L351 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 5585 treesize of output 5370 [2023-11-06 22:49:55,413 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:49:55,415 INFO L351 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 5361 treesize of output 5114 [2023-11-06 22:49:55,602 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:49:55,604 INFO L351 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 5105 treesize of output 5050 [2023-11-06 22:49:55,791 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5041 treesize of output 5037 [2023-11-06 22:49:55,999 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5037 treesize of output 5029 [2023-11-06 22:49:56,201 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5029 treesize of output 5027 [2023-11-06 22:50:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 1 not checked. [2023-11-06 22:50:19,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:19,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266145394] [2023-11-06 22:50:19,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:50:19,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622981644] [2023-11-06 22:50:19,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622981644] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:50:19,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:50:19,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2023-11-06 22:50:19,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950326596] [2023-11-06 22:50:19,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:50:19,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 22:50:19,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:19,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 22:50:19,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=916, Unknown=22, NotChecked=62, Total=1122 [2023-11-06 22:50:21,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 604 [2023-11-06 22:50:21,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 180 flow. Second operand has 34 states, 34 states have (on average 149.64705882352942) internal successors, (5088), 34 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:21,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:50:21,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 604 [2023-11-06 22:50:21,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:50:23,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:50:26,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:50:28,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:50:33,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:50:35,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:50:39,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:50:44,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:50:49,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:51:03,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:51:05,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:51:16,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:51:18,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:51:23,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2023-11-06 22:51:25,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:51:33,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2023-11-06 22:51:37,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:51:39,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2023-11-06 22:51:41,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:51:42,035 INFO L124 PetriNetUnfolderBase]: 599/1017 cut-off events. [2023-11-06 22:51:42,035 INFO L125 PetriNetUnfolderBase]: For 939/939 co-relation queries the response was YES. [2023-11-06 22:51:42,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3217 conditions, 1017 events. 599/1017 cut-off events. For 939/939 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 4091 event pairs, 99 based on Foata normal form. 1/1018 useless extension candidates. Maximal degree in co-relation 3187. Up to 448 conditions per place. [2023-11-06 22:51:42,045 INFO L140 encePairwiseOnDemand]: 587/604 looper letters, 100 selfloop transitions, 38 changer transitions 1/139 dead transitions. [2023-11-06 22:51:42,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 139 transitions, 876 flow [2023-11-06 22:51:42,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:51:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:51:42,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3535 transitions. [2023-11-06 22:51:42,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2544630002879355 [2023-11-06 22:51:42,063 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3535 transitions. [2023-11-06 22:51:42,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3535 transitions. [2023-11-06 22:51:42,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:51:42,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3535 transitions. [2023-11-06 22:51:42,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 153.69565217391303) internal successors, (3535), 23 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:42,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 604.0) internal successors, (14496), 24 states have internal predecessors, (14496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:42,102 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 604.0) internal successors, (14496), 24 states have internal predecessors, (14496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:42,102 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 180 flow. Second operand 23 states and 3535 transitions. [2023-11-06 22:51:42,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 139 transitions, 876 flow [2023-11-06 22:51:42,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 139 transitions, 852 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:51:42,110 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 476 flow [2023-11-06 22:51:42,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=604, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=476, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2023-11-06 22:51:42,111 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 50 predicate places. [2023-11-06 22:51:42,111 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 476 flow [2023-11-06 22:51:42,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 149.64705882352942) internal successors, (5088), 34 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:42,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:51:42,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:42,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:42,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:42,315 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:51:42,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:42,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1279570718, now seen corresponding path program 2 times [2023-11-06 22:51:42,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:42,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28723871] [2023-11-06 22:51:42,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:42,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:42,344 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:51:42,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656169659] [2023-11-06 22:51:42,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:51:42,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:42,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:42,354 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:42,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9a66eb-d80f-4790-850f-cd4daf7ff684/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:51:42,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:51:42,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:51:42,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-06 22:51:42,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:42,998 INFO L322 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2023-11-06 22:51:42,999 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 34 [2023-11-06 22:51:43,121 INFO L322 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2023-11-06 22:51:43,122 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2023-11-06 22:51:43,329 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-11-06 22:51:43,329 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 32 treesize of output 57 [2023-11-06 22:51:43,528 INFO L322 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2023-11-06 22:51:43,529 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 39 [2023-11-06 22:51:43,897 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 9 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 [2023-11-06 22:51:44,047 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2023-11-06 22:51:44,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 30 [2023-11-06 22:51:44,590 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2023-11-06 22:51:44,603 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-11-06 22:51:45,439 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 22:51:45,439 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 73 [2023-11-06 22:51:45,451 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2023-11-06 22:51:45,462 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2023-11-06 22:51:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:51:45,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:46,264 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:51:46,265 INFO L351 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 322 treesize of output 290 [2023-11-06 22:51:46,284 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 143 treesize of output 137