./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/config/GemCutterReach.xml -i ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/config/svcomp-Reach-32bit-GemCutter_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer GemCutter --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 389f5b7d6579b5ac06564f3c82f3f69fea502868b761df6187d49f96e1a317cd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-17 22:49:19,571 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 22:49:19,694 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/config/svcomp-Reach-32bit-GemCutter_Default.epf [2023-11-17 22:49:19,704 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-17 22:49:19,708 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-17 22:49:19,751 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 22:49:19,752 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-17 22:49:19,753 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-17 22:49:19,755 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 22:49:19,761 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 22:49:19,763 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 22:49:19,764 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 22:49:19,764 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 22:49:19,766 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 22:49:19,767 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 22:49:19,768 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 22:49:19,768 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 22:49:19,769 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 22:49:19,769 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 22:49:19,770 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 22:49:19,770 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 22:49:19,771 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 22:49:19,772 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 22:49:19,772 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 22:49:19,772 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 22:49:19,774 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 22:49:19,774 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 22:49:19,774 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 22:49:19,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 22:49:19,776 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 22:49:19,777 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 22:49:19,777 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 22:49:19,778 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 22:49:19,778 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2023-11-17 22:49:19,778 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 22:49:19,789 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-17 22:49:19,789 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2023-11-17 22:49:19,790 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-17 22:49:19,790 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2023-11-17 22:49:19,790 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2023-11-17 22:49:19,790 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> GemCutter Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 389f5b7d6579b5ac06564f3c82f3f69fea502868b761df6187d49f96e1a317cd [2023-11-17 22:49:20,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 22:49:20,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 22:49:20,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 22:49:20,199 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 22:49:20,200 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 22:49:20,201 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i [2023-11-17 22:49:23,510 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 22:49:23,907 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 22:49:23,907 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i [2023-11-17 22:49:23,925 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/data/6194453dc/f1110e9228ed40c0a0eb07de0194b66a/FLAG380bce7e8 [2023-11-17 22:49:23,942 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/data/6194453dc/f1110e9228ed40c0a0eb07de0194b66a [2023-11-17 22:49:23,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 22:49:23,947 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-17 22:49:23,949 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 22:49:23,949 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 22:49:23,956 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 22:49:23,957 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 10:49:23" (1/1) ... [2023-11-17 22:49:23,958 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@745f0e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 10:49:23, skipping insertion in model container [2023-11-17 22:49:23,959 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 10:49:23" (1/1) ... [2023-11-17 22:49:24,030 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 22:49:24,508 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_c04acbdf-d038-4782-a5c3-cda73449d8e1/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i[30648,30661] [2023-11-17 22:49:24,521 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 22:49:24,539 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 22:49:24,620 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_c04acbdf-d038-4782-a5c3-cda73449d8e1/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i[30648,30661] [2023-11-17 22:49:24,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 22:49:24,687 INFO L206 MainTranslator]: Completed translation [2023-11-17 22:49:24,687 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 10:49:24 WrapperNode [2023-11-17 22:49:24,688 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 22:49:24,689 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 22:49:24,690 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 22:49:24,690 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 22:49:24,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 10:49:24" (1/1) ... [2023-11-17 22:49:24,733 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 10:49:24" (1/1) ... [2023-11-17 22:49:24,759 INFO L138 Inliner]: procedures = 162, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2023-11-17 22:49:24,759 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 22:49:24,760 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 22:49:24,760 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 22:49:24,761 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 22:49:24,771 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 10:49:24" (1/1) ... [2023-11-17 22:49:24,771 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 10:49:24" (1/1) ... [2023-11-17 22:49:24,775 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 10:49:24" (1/1) ... [2023-11-17 22:49:24,776 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 10:49:24" (1/1) ... [2023-11-17 22:49:24,798 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 10:49:24" (1/1) ... [2023-11-17 22:49:24,803 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 10:49:24" (1/1) ... [2023-11-17 22:49:24,813 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 10:49:24" (1/1) ... [2023-11-17 22:49:24,814 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 10:49:24" (1/1) ... [2023-11-17 22:49:24,818 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 22:49:24,819 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 22:49:24,819 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 22:49:24,820 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 22:49:24,821 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 10:49:24" (1/1) ... [2023-11-17 22:49:24,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 22:49:24,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:24,877 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 22:49:24,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 22:49:24,924 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-11-17 22:49:24,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-11-17 22:49:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 22:49:24,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 22:49:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 22:49:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 22:49:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 22:49:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 22:49:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 22:49:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 22:49:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 22:49:24,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 22:49:24,933 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 22:49:25,140 INFO L236 CfgBuilder]: Building ICFG [2023-11-17 22:49:25,143 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 22:49:25,342 INFO L277 CfgBuilder]: Performing block encoding [2023-11-17 22:49:25,352 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 22:49:25,352 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 22:49:25,356 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 10:49:25 BoogieIcfgContainer [2023-11-17 22:49:25,357 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 22:49:25,360 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 22:49:25,360 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 22:49:25,364 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 22:49:25,365 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 10:49:23" (1/3) ... [2023-11-17 22:49:25,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f8e305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 10:49:25, skipping insertion in model container [2023-11-17 22:49:25,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 10:49:24" (2/3) ... [2023-11-17 22:49:25,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f8e305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 10:49:25, skipping insertion in model container [2023-11-17 22:49:25,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 10:49:25" (3/3) ... [2023-11-17 22:49:25,368 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs-pthread.i [2023-11-17 22:49:25,379 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-17 22:49:25,392 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 22:49:25,392 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 22:49:25,392 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 22:49:25,453 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 22:49:25,543 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 22:49:25,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-11-17 22:49:25,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:25,548 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-11-17 22:49:25,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2023-11-17 22:49:25,665 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2023-11-17 22:49:25,683 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thr1Thread1of1ForFork1 ======== [2023-11-17 22:49:25,693 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=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28b21262, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 22:49:25,693 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-17 22:49:25,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 22:49:25,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:25,936 INFO L85 PathProgramCache]: Analyzing trace with hash -469750890, now seen corresponding path program 1 times [2023-11-17 22:49:25,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:25,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990792170] [2023-11-17 22:49:25,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:25,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 22:49:26,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 22:49:26,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990792170] [2023-11-17 22:49:26,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990792170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 22:49:26,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 22:49:26,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 22:49:26,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056765400] [2023-11-17 22:49:26,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 22:49:26,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 22:49:26,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 22:49:26,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 22:49:26,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 22:49:26,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:26,524 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-11-17 22:49:26,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2023-11-17 22:49:26,526 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:26,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:26,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 22:49:26,683 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 22:49:26,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:26,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1797756797, now seen corresponding path program 1 times [2023-11-17 22:49:26,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:26,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122502470] [2023-11-17 22:49:26,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:26,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 22:49:27,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 22:49:27,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122502470] [2023-11-17 22:49:27,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122502470] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 22:49:27,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815384273] [2023-11-17 22:49:27,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:27,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 22:49:27,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:27,322 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 22:49:27,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 22:49:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:27,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 22:49:27,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 22:49:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 22:49:27,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 22:49:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 22:49:28,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815384273] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 22:49:28,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 22:49:28,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 22:49:28,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790376558] [2023-11-17 22:49:28,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 22:49:28,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 22:49:28,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 22:49:28,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 22:49:28,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-17 22:49:28,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:28,136 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-11-17 22:49:28,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.076923076923077) internal successors, (157), 13 states have internal predecessors, (157), 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) [2023-11-17 22:49:28,136 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:28,137 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:28,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:28,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 22:49:28,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 22:49:28,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-17 22:49:28,500 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 22:49:28,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:28,500 INFO L85 PathProgramCache]: Analyzing trace with hash 590559637, now seen corresponding path program 2 times [2023-11-17 22:49:28,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:28,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490761911] [2023-11-17 22:49:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:28,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 22:49:28,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 22:49:28,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490761911] [2023-11-17 22:49:28,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490761911] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 22:49:28,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599797141] [2023-11-17 22:49:28,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 22:49:28,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 22:49:28,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:28,855 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 22:49:28,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 22:49:29,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 22:49:29,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 22:49:29,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 22:49:29,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 22:49:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 22:49:29,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 22:49:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 22:49:29,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599797141] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 22:49:29,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 22:49:29,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-17 22:49:29,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858598176] [2023-11-17 22:49:29,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 22:49:29,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 22:49:29,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 22:49:29,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 22:49:29,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2023-11-17 22:49:29,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:29,666 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-11-17 22:49:29,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.652173913043478) internal successors, (199), 23 states have internal predecessors, (199), 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) [2023-11-17 22:49:29,667 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:29,667 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2023-11-17 22:49:29,668 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:30,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:30,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 22:49:30,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 22:49:30,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 22:49:30,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 22:49:30,297 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 22:49:30,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:30,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1687568771, now seen corresponding path program 3 times [2023-11-17 22:49:30,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:30,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142868517] [2023-11-17 22:49:30,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:30,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 22:49:30,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 22:49:30,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142868517] [2023-11-17 22:49:30,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142868517] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 22:49:30,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703175094] [2023-11-17 22:49:30,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 22:49:30,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 22:49:30,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:30,602 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 22:49:30,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 22:49:30,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 22:49:30,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 22:49:30,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 22:49:30,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 22:49:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-17 22:49:31,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 22:49:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-17 22:49:31,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703175094] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 22:49:31,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 22:49:31,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 25 [2023-11-17 22:49:31,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973713638] [2023-11-17 22:49:31,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 22:49:31,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 22:49:31,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 22:49:31,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 22:49:31,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2023-11-17 22:49:31,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:31,528 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-11-17 22:49:31,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.28) internal successors, (232), 25 states have internal predecessors, (232), 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) [2023-11-17 22:49:31,529 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:31,529 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2023-11-17 22:49:31,529 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 18 states. [2023-11-17 22:49:31,529 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:32,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:32,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 22:49:32,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 22:49:32,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 22:49:32,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 22:49:32,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 22:49:32,503 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 22:49:32,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:32,504 INFO L85 PathProgramCache]: Analyzing trace with hash -212978535, now seen corresponding path program 4 times [2023-11-17 22:49:32,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:32,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999494267] [2023-11-17 22:49:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:32,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 374 proven. 0 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-11-17 22:49:32,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 22:49:32,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999494267] [2023-11-17 22:49:32,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999494267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 22:49:32,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 22:49:32,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 22:49:32,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948472000] [2023-11-17 22:49:32,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 22:49:32,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 22:49:32,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 22:49:32,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 22:49:32,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 22:49:32,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:32,850 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-11-17 22:49:32,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2023-11-17 22:49:32,851 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:32,851 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2023-11-17 22:49:32,851 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2023-11-17 22:49:32,851 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 22 states. [2023-11-17 22:49:32,851 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:33,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:33,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 22:49:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 22:49:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 22:49:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 22:49:33,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 22:49:33,161 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 22:49:33,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:33,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1573856036, now seen corresponding path program 5 times [2023-11-17 22:49:33,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:33,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933458467] [2023-11-17 22:49:33,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:33,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 22:49:33,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 22:49:33,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933458467] [2023-11-17 22:49:33,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933458467] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 22:49:33,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314077516] [2023-11-17 22:49:33,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 22:49:33,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 22:49:33,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:33,623 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 22:49:33,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 22:49:33,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-17 22:49:33,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 22:49:33,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 22:49:33,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 22:49:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-17 22:49:34,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 22:49:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-17 22:49:34,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314077516] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 22:49:34,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 22:49:34,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 31 [2023-11-17 22:49:34,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067123646] [2023-11-17 22:49:34,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 22:49:34,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 22:49:34,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 22:49:34,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 22:49:34,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2023-11-17 22:49:34,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:34,640 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-11-17 22:49:34,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.451612903225806) internal successors, (231), 31 states have internal predecessors, (231), 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) [2023-11-17 22:49:34,641 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:34,641 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2023-11-17 22:49:34,641 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 20 states. [2023-11-17 22:49:34,641 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 31 states. [2023-11-17 22:49:34,641 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2023-11-17 22:49:34,642 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:36,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:36,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 22:49:36,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 22:49:36,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 22:49:36,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 22:49:36,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 22:49:36,113 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-17 22:49:36,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 22:49:36,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 22:49:36,344 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1] [2023-11-17 22:49:36,346 INFO L307 ceAbstractionStarter]: Result for error location thr1Thread1of1ForFork1 was SAFE (1/2) [2023-11-17 22:49:36,351 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 22:49:36,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-11-17 22:49:36,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:36,353 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-11-17 22:49:36,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (7)] Waiting until timeout for monitored process [2023-11-17 22:49:36,362 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2023-11-17 22:49:36,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2023-11-17 22:49:36,365 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=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28b21262, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 22:49:36,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 22:49:36,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 22:49:36,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:36,437 INFO L85 PathProgramCache]: Analyzing trace with hash -896428925, now seen corresponding path program 1 times [2023-11-17 22:49:36,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:36,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100831962] [2023-11-17 22:49:36,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:36,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 22:49:36,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 22:49:36,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100831962] [2023-11-17 22:49:36,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100831962] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 22:49:36,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 22:49:36,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 22:49:36,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842681306] [2023-11-17 22:49:36,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 22:49:36,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 22:49:36,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 22:49:36,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 22:49:36,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 22:49:36,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:36,515 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-11-17 22:49:36,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2023-11-17 22:49:36,516 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:36,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 22:49:36,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 22:49:36,575 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 22:49:36,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:36,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1544857245, now seen corresponding path program 1 times [2023-11-17 22:49:36,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:36,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208383410] [2023-11-17 22:49:36,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:36,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 22:49:36,613 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 22:49:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 22:49:36,675 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 22:49:36,675 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 22:49:36,676 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 22:49:36,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-11-17 22:49:36,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 22:49:36,684 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 22:49:36,684 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE,UNKNOWN (2/2) [2023-11-17 22:49:36,685 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 22:49:36,685 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 22:49:36,717 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 22:49:36,722 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 22:49:36,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-11-17 22:49:36,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:36,728 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-11-17 22:49:36,746 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2023-11-17 22:49:36,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2023-11-17 22:49:36,747 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=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28b21262, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 22:49:36,747 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 22:49:36,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (8)] Waiting until timeout for monitored process [2023-11-17 22:49:36,933 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 22:49:36,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:36,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1081665476, now seen corresponding path program 1 times [2023-11-17 22:49:36,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:36,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756355310] [2023-11-17 22:49:36,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:36,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-17 22:49:37,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 22:49:37,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756355310] [2023-11-17 22:49:37,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756355310] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 22:49:37,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 22:49:37,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 22:49:37,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318454819] [2023-11-17 22:49:37,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 22:49:37,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 22:49:37,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 22:49:37,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 22:49:37,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 22:49:37,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:37,050 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-11-17 22:49:37,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2023-11-17 22:49:37,051 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:37,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 22:49:37,152 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 22:49:37,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:37,152 INFO L85 PathProgramCache]: Analyzing trace with hash -904339782, now seen corresponding path program 1 times [2023-11-17 22:49:37,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:37,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026334061] [2023-11-17 22:49:37,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:37,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 22:49:37,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 22:49:37,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026334061] [2023-11-17 22:49:37,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026334061] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 22:49:37,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389984430] [2023-11-17 22:49:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:37,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 22:49:37,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:37,396 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 22:49:37,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 22:49:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:37,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 22:49:37,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 22:49:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 22:49:37,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 22:49:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 22:49:37,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389984430] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 22:49:37,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 22:49:37,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 22:49:37,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418375296] [2023-11-17 22:49:37,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 22:49:37,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 22:49:37,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 22:49:37,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 22:49:37,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-17 22:49:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:37,960 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-11-17 22:49:37,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 13 states have internal predecessors, (187), 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) [2023-11-17 22:49:37,961 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:37,961 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:38,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:38,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 22:49:38,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 22:49:38,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-17 22:49:38,326 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 22:49:38,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:38,326 INFO L85 PathProgramCache]: Analyzing trace with hash 559279417, now seen corresponding path program 1 times [2023-11-17 22:49:38,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:38,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209087153] [2023-11-17 22:49:38,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:38,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 22:49:38,361 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 22:49:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 22:49:38,410 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 22:49:38,413 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 22:49:38,413 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 22:49:38,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-11-17 22:49:38,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 22:49:38,416 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 22:49:38,417 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE,UNKNOWN (1/3) [2023-11-17 22:49:38,417 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 22:49:38,417 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 22:49:38,447 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 22:49:38,451 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 22:49:38,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-11-17 22:49:38,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:38,453 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-11-17 22:49:38,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (10)] Waiting until timeout for monitored process [2023-11-17 22:49:38,457 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2023-11-17 22:49:38,458 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thr1Thread3of3ForFork1 ======== [2023-11-17 22:49:38,459 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=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28b21262, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 22:49:38,459 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-17 22:49:38,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-17 22:49:38,463 INFO L445 BasicCegarLoop]: Path program histogram: [] [2023-11-17 22:49:38,464 INFO L307 ceAbstractionStarter]: Result for error location thr1Thread3of3ForFork1 was SAFE (1/4) [2023-11-17 22:49:38,467 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 22:49:38,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-11-17 22:49:38,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:38,474 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-11-17 22:49:38,477 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2023-11-17 22:49:38,478 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2023-11-17 22:49:38,478 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=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28b21262, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 22:49:38,479 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 22:49:38,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (11)] Waiting until timeout for monitored process [2023-11-17 22:49:38,822 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 22:49:38,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:38,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1827850645, now seen corresponding path program 1 times [2023-11-17 22:49:38,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:38,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683174482] [2023-11-17 22:49:38,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:38,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-17 22:49:38,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 22:49:38,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683174482] [2023-11-17 22:49:38,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683174482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 22:49:38,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 22:49:38,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 22:49:38,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326857542] [2023-11-17 22:49:38,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 22:49:38,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 22:49:38,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 22:49:38,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 22:49:38,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 22:49:38,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:38,920 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-11-17 22:49:38,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2023-11-17 22:49:38,921 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:39,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:39,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 22:49:39,026 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 22:49:39,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:39,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1722359369, now seen corresponding path program 1 times [2023-11-17 22:49:39,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:39,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338007239] [2023-11-17 22:49:39,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:39,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-17 22:49:39,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 22:49:39,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338007239] [2023-11-17 22:49:39,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338007239] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 22:49:39,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099083788] [2023-11-17 22:49:39,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:39,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 22:49:39,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:39,240 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 22:49:39,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 22:49:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:39,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 22:49:39,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 22:49:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-17 22:49:39,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 22:49:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-17 22:49:39,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099083788] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 22:49:39,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 22:49:39,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 22:49:39,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896614283] [2023-11-17 22:49:39,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 22:49:39,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 22:49:39,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 22:49:39,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 22:49:39,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-17 22:49:39,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:39,831 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-11-17 22:49:39,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.307692307692308) internal successors, (199), 13 states have internal predecessors, (199), 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) [2023-11-17 22:49:39,832 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:39,832 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:40,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:40,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 22:49:40,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 22:49:40,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-17 22:49:40,227 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 22:49:40,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:40,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1801948211, now seen corresponding path program 2 times [2023-11-17 22:49:40,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:40,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990567560] [2023-11-17 22:49:40,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:40,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-17 22:49:40,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 22:49:40,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990567560] [2023-11-17 22:49:40,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990567560] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 22:49:40,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010953795] [2023-11-17 22:49:40,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 22:49:40,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 22:49:40,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:40,474 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 22:49:40,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 22:49:40,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 22:49:40,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 22:49:40,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 22:49:40,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 22:49:40,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-17 22:49:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-17 22:49:40,719 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 22:49:40,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010953795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 22:49:40,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 22:49:40,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-11-17 22:49:40,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118062209] [2023-11-17 22:49:40,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 22:49:40,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 22:49:40,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 22:49:40,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 22:49:40,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-17 22:49:40,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:40,722 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-11-17 22:49:40,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2023-11-17 22:49:40,723 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:40,723 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2023-11-17 22:49:40,723 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:40,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:40,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 22:49:40,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 22:49:40,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 22:49:40,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 22:49:40,996 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 22:49:40,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:40,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1976572169, now seen corresponding path program 1 times [2023-11-17 22:49:40,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:40,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349610116] [2023-11-17 22:49:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:40,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-17 22:49:41,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 22:49:41,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349610116] [2023-11-17 22:49:41,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349610116] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 22:49:41,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841980045] [2023-11-17 22:49:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:41,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 22:49:41,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:41,212 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 22:49:41,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 22:49:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:41,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 22:49:41,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 22:49:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-17 22:49:41,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 22:49:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-17 22:49:42,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841980045] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 22:49:42,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 22:49:42,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 25 [2023-11-17 22:49:42,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227471648] [2023-11-17 22:49:42,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 22:49:42,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 22:49:42,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 22:49:42,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 22:49:42,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2023-11-17 22:49:42,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:42,230 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-11-17 22:49:42,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.6) internal successors, (240), 25 states have internal predecessors, (240), 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) [2023-11-17 22:49:42,231 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:42,231 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2023-11-17 22:49:42,231 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2023-11-17 22:49:42,231 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:43,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:43,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 22:49:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 22:49:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 22:49:43,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 22:49:43,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 22:49:43,229 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 22:49:43,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:43,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2119586894, now seen corresponding path program 1 times [2023-11-17 22:49:43,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:43,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374941649] [2023-11-17 22:49:43,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:43,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 22:49:43,282 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 22:49:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 22:49:43,334 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 22:49:43,335 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 22:49:43,335 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 22:49:43,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-11-17 22:49:43,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-17 22:49:43,338 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-11-17 22:49:43,338 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE,UNKNOWN (2/4) [2023-11-17 22:49:43,339 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 22:49:43,339 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 22:49:43,406 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 22:49:43,409 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 22:49:43,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-11-17 22:49:43,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:43,411 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-11-17 22:49:43,419 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2023-11-17 22:49:43,420 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thr1Thread3of4ForFork1 ======== [2023-11-17 22:49:43,420 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=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28b21262, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 22:49:43,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-17 22:49:43,423 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-17 22:49:43,425 INFO L445 BasicCegarLoop]: Path program histogram: [] [2023-11-17 22:49:43,425 INFO L307 ceAbstractionStarter]: Result for error location thr1Thread3of4ForFork1 was SAFE (1/5) [2023-11-17 22:49:43,428 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 22:49:43,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-11-17 22:49:43,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:43,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (15)] Waiting until timeout for monitored process [2023-11-17 22:49:43,434 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-11-17 22:49:43,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (16)] Waiting until timeout for monitored process [2023-11-17 22:49:43,440 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2023-11-17 22:49:43,440 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thr1Thread4of4ForFork1 ======== [2023-11-17 22:49:43,441 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=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28b21262, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 22:49:43,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-17 22:49:43,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-17 22:49:43,447 INFO L445 BasicCegarLoop]: Path program histogram: [] [2023-11-17 22:49:43,447 INFO L307 ceAbstractionStarter]: Result for error location thr1Thread4of4ForFork1 was SAFE (2/5) [2023-11-17 22:49:43,452 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 22:49:43,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-11-17 22:49:43,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:43,455 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-11-17 22:49:43,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (17)] Waiting until timeout for monitored process [2023-11-17 22:49:43,465 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2023-11-17 22:49:43,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thr1Thread2of4ForFork1 ======== [2023-11-17 22:49:43,466 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=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28b21262, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 22:49:43,466 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-17 22:49:43,469 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-17 22:49:43,470 INFO L445 BasicCegarLoop]: Path program histogram: [] [2023-11-17 22:49:43,470 INFO L307 ceAbstractionStarter]: Result for error location thr1Thread2of4ForFork1 was SAFE (3/5) [2023-11-17 22:49:43,473 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 22:49:43,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-11-17 22:49:43,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:43,480 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-11-17 22:49:43,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (18)] Waiting until timeout for monitored process [2023-11-17 22:49:43,484 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2023-11-17 22:49:43,484 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thr1Thread1of4ForFork1 ======== [2023-11-17 22:49:43,485 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=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28b21262, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 22:49:43,485 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-17 22:49:43,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 22:49:43,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:43,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1846968182, now seen corresponding path program 1 times [2023-11-17 22:49:43,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:43,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338590386] [2023-11-17 22:49:43,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:43,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 22:49:43,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 22:49:43,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338590386] [2023-11-17 22:49:43,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338590386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 22:49:43,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 22:49:43,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 22:49:43,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388212852] [2023-11-17 22:49:43,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 22:49:43,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 22:49:43,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 22:49:43,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 22:49:43,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 22:49:43,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:43,639 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-11-17 22:49:43,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2023-11-17 22:49:43,640 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:43,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:43,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-17 22:49:43,811 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 22:49:43,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:43,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1286652497, now seen corresponding path program 1 times [2023-11-17 22:49:43,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:43,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098545070] [2023-11-17 22:49:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:43,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 22:49:43,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 22:49:43,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098545070] [2023-11-17 22:49:43,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098545070] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 22:49:43,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084607047] [2023-11-17 22:49:43,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:43,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 22:49:43,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:43,950 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 22:49:43,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 22:49:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:44,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 22:49:44,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 22:49:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 22:49:44,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 22:49:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 22:49:44,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084607047] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 22:49:44,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 22:49:44,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 22:49:44,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008052816] [2023-11-17 22:49:44,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 22:49:44,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 22:49:44,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 22:49:44,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 22:49:44,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-17 22:49:44,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:44,511 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-11-17 22:49:44,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.76923076923077) internal successors, (166), 13 states have internal predecessors, (166), 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) [2023-11-17 22:49:44,512 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:44,512 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:44,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:44,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 22:49:44,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 22:49:44,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-17 22:49:44,995 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 22:49:44,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:44,995 INFO L85 PathProgramCache]: Analyzing trace with hash -358248278, now seen corresponding path program 1 times [2023-11-17 22:49:44,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:44,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272876448] [2023-11-17 22:49:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:44,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-17 22:49:45,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 22:49:45,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272876448] [2023-11-17 22:49:45,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272876448] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 22:49:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654192972] [2023-11-17 22:49:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:45,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 22:49:45,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 [2023-11-17 22:49:45,194 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 22:49:45,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 22:49:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:45,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 22:49:45,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 22:49:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-17 22:49:45,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 22:49:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-17 22:49:46,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654192972] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 22:49:46,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 22:49:46,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 25 [2023-11-17 22:49:46,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725425554] [2023-11-17 22:49:46,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 22:49:46,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 22:49:46,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 22:49:46,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 22:49:46,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2023-11-17 22:49:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:46,154 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-11-17 22:49:46,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.28) internal successors, (232), 25 states have internal predecessors, (232), 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) [2023-11-17 22:49:46,156 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:46,156 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2023-11-17 22:49:46,156 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:47,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:47,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 22:49:47,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 22:49:47,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-17 22:49:48,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04acbdf-d038-4782-a5c3-cda73449d8e1/bin/ugemcutter-verify-ztSkJzofpW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 22:49:48,104 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 22:49:48,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 22:49:48,104 INFO L85 PathProgramCache]: Analyzing trace with hash -67909380, now seen corresponding path program 1 times [2023-11-17 22:49:48,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 22:49:48,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948410198] [2023-11-17 22:49:48,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 22:49:48,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 22:49:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 22:49:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 743 proven. 0 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2023-11-17 22:49:48,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 22:49:48,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948410198] [2023-11-17 22:49:48,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948410198] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 22:49:48,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 22:49:48,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 22:49:48,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302301243] [2023-11-17 22:49:48,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 22:49:48,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 22:49:48,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 22:49:48,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 22:49:48,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 22:49:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 22:49:48,691 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-11-17 22:49:48,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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) [2023-11-17 22:49:48,692 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2023-11-17 22:49:48,692 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2023-11-17 22:49:48,692 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 27 states. [2023-11-17 22:49:48,692 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states.