./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-40.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/config/GemCutterReach.xml -i ../../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-40.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/config/svcomp-Reach-32bit-GemCutter_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer GemCutter --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b6d5da741db538e8728209fa456d0dc9c63ceba5521dacbaf062bafc94e3da01 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 16:26:06,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 16:26:06,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 16:26:06,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 16:26:06,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 16:26:06,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 16:26:06,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 16:26:06,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 16:26:06,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 16:26:06,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 16:26:06,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 16:26:06,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 16:26:06,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 16:26:06,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 16:26:06,520 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 16:26:06,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 16:26:06,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 16:26:06,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 16:26:06,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 16:26:06,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 16:26:06,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 16:26:06,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 16:26:06,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 16:26:06,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 16:26:06,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 16:26:06,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 16:26:06,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 16:26:06,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 16:26:06,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 16:26:06,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 16:26:06,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 16:26:06,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 16:26:06,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 16:26:06,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 16:26:06,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 16:26:06,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 16:26:06,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 16:26:06,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 16:26:06,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 16:26:06,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 16:26:06,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 16:26:06,567 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/config/svcomp-Reach-32bit-GemCutter_Default.epf [2022-11-20 16:26:06,606 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 16:26:06,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 16:26:06,607 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 16:26:06,607 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 16:26:06,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 16:26:06,608 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 16:26:06,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 16:26:06,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 16:26:06,609 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 16:26:06,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 16:26:06,611 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 16:26:06,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 16:26:06,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 16:26:06,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 16:26:06,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 16:26:06,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 16:26:06,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 16:26:06,612 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 16:26:06,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 16:26:06,613 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 16:26:06,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 16:26:06,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 16:26:06,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 16:26:06,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 16:26:06,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 16:26:06,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 16:26:06,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 16:26:06,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 16:26:06,615 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 16:26:06,616 INFO L138 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2022-11-20 16:26:06,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 16:26:06,616 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 16:26:06,617 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2022-11-20 16:26:06,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 16:26:06,617 INFO L138 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2022-11-20 16:26:06,617 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2022-11-20 16:26:06,618 INFO L138 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_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> GemCutter Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6d5da741db538e8728209fa456d0dc9c63ceba5521dacbaf062bafc94e3da01 [2022-11-20 16:26:06,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 16:26:06,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 16:26:06,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 16:26:06,935 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 16:26:06,936 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 16:26:06,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/../../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-40.i [2022-11-20 16:26:10,011 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 16:26:10,420 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 16:26:10,421 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-40.i [2022-11-20 16:26:10,434 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/data/fe0e89e0c/1b0c933990f44266834012534f91f103/FLAG61b6721ff [2022-11-20 16:26:10,454 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/data/fe0e89e0c/1b0c933990f44266834012534f91f103 [2022-11-20 16:26:10,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 16:26:10,459 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 16:26:10,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 16:26:10,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 16:26:10,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 16:26:10,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:26:10" (1/1) ... [2022-11-20 16:26:10,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a981e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:26:10, skipping insertion in model container [2022-11-20 16:26:10,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:26:10" (1/1) ... [2022-11-20 16:26:10,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 16:26:10,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 16:26:10,912 WARN L237 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_b98f723c-02f0-4586-83f7-6459f2c52426/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-40.i[30190,30203] [2022-11-20 16:26:10,930 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 16:26:10,940 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 16:26:10,995 WARN L237 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_b98f723c-02f0-4586-83f7-6459f2c52426/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-40.i[30190,30203] [2022-11-20 16:26:11,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 16:26:11,033 INFO L208 MainTranslator]: Completed translation [2022-11-20 16:26:11,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:26:11 WrapperNode [2022-11-20 16:26:11,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 16:26:11,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 16:26:11,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 16:26:11,036 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 16:26:11,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:26:11" (1/1) ... [2022-11-20 16:26:11,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:26:11" (1/1) ... [2022-11-20 16:26:11,080 INFO L138 Inliner]: procedures = 163, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 71 [2022-11-20 16:26:11,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 16:26:11,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 16:26:11,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 16:26:11,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 16:26:11,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:26:11" (1/1) ... [2022-11-20 16:26:11,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:26:11" (1/1) ... [2022-11-20 16:26:11,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:26:11" (1/1) ... [2022-11-20 16:26:11,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:26:11" (1/1) ... [2022-11-20 16:26:11,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:26:11" (1/1) ... [2022-11-20 16:26:11,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:26:11" (1/1) ... [2022-11-20 16:26:11,106 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:26:11" (1/1) ... [2022-11-20 16:26:11,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:26:11" (1/1) ... [2022-11-20 16:26:11,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 16:26:11,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 16:26:11,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 16:26:11,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 16:26:11,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:26:11" (1/1) ... [2022-11-20 16:26:11,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 16:26:11,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:11,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 16:26:11,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 16:26:11,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 16:26:11,202 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2022-11-20 16:26:11,202 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2022-11-20 16:26:11,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 16:26:11,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 16:26:11,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 16:26:11,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 16:26:11,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 16:26:11,203 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2022-11-20 16:26:11,203 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2022-11-20 16:26:11,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 16:26:11,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 16:26:11,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 16:26:11,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 16:26:11,206 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 16:26:11,334 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 16:26:11,336 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 16:26:11,560 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 16:26:11,567 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 16:26:11,567 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 16:26:11,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:26:11 BoogieIcfgContainer [2022-11-20 16:26:11,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 16:26:11,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 16:26:11,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 16:26:11,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 16:26:11,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 04:26:10" (1/3) ... [2022-11-20 16:26:11,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df72dec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:26:11, skipping insertion in model container [2022-11-20 16:26:11,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:26:11" (2/3) ... [2022-11-20 16:26:11,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df72dec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:26:11, skipping insertion in model container [2022-11-20 16:26:11,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:26:11" (3/3) ... [2022-11-20 16:26:11,589 INFO L112 eAbstractionObserver]: Analyzing ICFG reorder_c11_bad-40.i [2022-11-20 16:26:11,603 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 16:26:11,614 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 16:26:11,615 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 16:26:11,615 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 16:26:11,690 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 16:26:11,737 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:11,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-11-20 16:26:11,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:11,739 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-11-20 16:26:11,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2022-11-20 16:26:11,779 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-11-20 16:26:11,794 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == checkThreadThread1of1ForFork1 ======== [2022-11-20 16:26:11,801 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2c1f83e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:11,801 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 16:26:11,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:11,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:11,928 INFO L85 PathProgramCache]: Analyzing trace with hash -211201094, now seen corresponding path program 1 times [2022-11-20 16:26:11,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:11,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702719875] [2022-11-20 16:26:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:11,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 16:26:12,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:12,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702719875] [2022-11-20 16:26:12,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702719875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:12,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:12,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 16:26:12,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713242913] [2022-11-20 16:26:12,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:12,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 16:26:12,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:12,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 16:26:12,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 16:26:12,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:12,180 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:12,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 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) [2022-11-20 16:26:12,182 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:12,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:12,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 16:26:12,199 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:12,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:12,200 INFO L85 PathProgramCache]: Analyzing trace with hash -407714599, now seen corresponding path program 1 times [2022-11-20 16:26:12,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:12,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339388126] [2022-11-20 16:26:12,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:12,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 16:26:12,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:12,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339388126] [2022-11-20 16:26:12,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339388126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:12,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:12,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 16:26:12,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340830427] [2022-11-20 16:26:12,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:12,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 16:26:12,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:12,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 16:26:12,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 16:26:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:12,362 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:12,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 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) [2022-11-20 16:26:12,362 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:12,363 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:12,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:12,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 16:26:12,462 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:12,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:12,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2025312585, now seen corresponding path program 1 times [2022-11-20 16:26:12,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:12,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25997374] [2022-11-20 16:26:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:12,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 16:26:12,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:12,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25997374] [2022-11-20 16:26:12,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25997374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 16:26:12,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021954922] [2022-11-20 16:26:12,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:12,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:12,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:12,798 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 16:26:12,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 16:26:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:12,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 16:26:12,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 16:26:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 16:26:12,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 16:26:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 16:26:13,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021954922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 16:26:13,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 16:26:13,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 16:26:13,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044250768] [2022-11-20 16:26:13,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 16:26:13,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 16:26:13,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:13,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 16:26:13,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 16:26:13,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:13,052 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:13,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 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) [2022-11-20 16:26:13,052 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:13,052 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:13,052 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:13,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:13,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:13,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 16:26:13,155 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 16:26:13,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 16:26:13,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:13,367 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 16:26:13,369 INFO L307 ceAbstractionStarter]: Result for error location checkThreadThread1of1ForFork1 was SAFE (1/2) [2022-11-20 16:26:13,380 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:13,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-11-20 16:26:13,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:13,382 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-11-20 16:26:13,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (4)] Waiting until timeout for monitored process [2022-11-20 16:26:13,393 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-11-20 16:26:13,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2022-11-20 16:26:13,394 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2c1f83e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:13,394 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 16:26:13,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 16:26:13,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:13,470 INFO L85 PathProgramCache]: Analyzing trace with hash 889598928, now seen corresponding path program 1 times [2022-11-20 16:26:13,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:13,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100371223] [2022-11-20 16:26:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:13,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 16:26:13,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:13,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100371223] [2022-11-20 16:26:13,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100371223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:13,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:13,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 16:26:13,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761600090] [2022-11-20 16:26:13,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:13,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 16:26:13,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:13,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 16:26:13,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 16:26:13,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:13,521 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:13,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 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) [2022-11-20 16:26:13,521 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:13,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:13,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 16:26:13,536 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 16:26:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:13,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1100949841, now seen corresponding path program 1 times [2022-11-20 16:26:13,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:13,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617032222] [2022-11-20 16:26:13,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:13,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 16:26:13,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:13,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617032222] [2022-11-20 16:26:13,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617032222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:13,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:13,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 16:26:13,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367085796] [2022-11-20 16:26:13,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:13,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 16:26:13,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:13,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 16:26:13,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 16:26:13,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:13,632 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:13,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2022-11-20 16:26:13,634 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:13,635 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:13,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:13,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:13,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 16:26:13,748 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 16:26:13,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:13,748 INFO L85 PathProgramCache]: Analyzing trace with hash -51185951, now seen corresponding path program 1 times [2022-11-20 16:26:13,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:13,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382795226] [2022-11-20 16:26:13,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:13,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 16:26:13,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:13,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382795226] [2022-11-20 16:26:13,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382795226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 16:26:13,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786642088] [2022-11-20 16:26:13,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:13,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:13,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:13,915 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 16:26:13,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 16:26:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:14,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 16:26:14,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 16:26:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 16:26:14,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 16:26:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 16:26:14,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786642088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 16:26:14,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 16:26:14,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 16:26:14,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331313183] [2022-11-20 16:26:14,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 16:26:14,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 16:26:14,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:14,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 16:26:14,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 16:26:14,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:14,237 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:14,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 16:26:14,238 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:14,238 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:14,239 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:14,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:14,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:14,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 16:26:14,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 16:26:14,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 16:26:14,512 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 16:26:14,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:14,513 INFO L85 PathProgramCache]: Analyzing trace with hash -809257032, now seen corresponding path program 1 times [2022-11-20 16:26:14,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:14,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312691640] [2022-11-20 16:26:14,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:14,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 16:26:14,551 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 16:26:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 16:26:14,596 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 16:26:14,596 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 16:26:14,597 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 16:26:14,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2022-11-20 16:26:14,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 16:26:14,603 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 16:26:14,604 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE,UNKNOWN (2/2) [2022-11-20 16:26:14,605 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 16:26:14,605 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 16:26:14,647 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-20 16:26:14,650 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:14,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-11-20 16:26:14,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:14,655 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-11-20 16:26:14,670 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-11-20 16:26:14,670 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == checkThreadThread1of2ForFork1 ======== [2022-11-20 16:26:14,671 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2c1f83e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:14,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 16:26:14,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (6)] Waiting until timeout for monitored process [2022-11-20 16:26:14,763 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:14,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:14,764 INFO L85 PathProgramCache]: Analyzing trace with hash -341074863, now seen corresponding path program 1 times [2022-11-20 16:26:14,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:14,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538862461] [2022-11-20 16:26:14,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:14,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 16:26:14,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:14,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538862461] [2022-11-20 16:26:14,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538862461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:14,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:14,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 16:26:14,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221442405] [2022-11-20 16:26:14,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:14,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 16:26:14,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:14,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 16:26:14,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 16:26:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:14,820 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:14,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 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) [2022-11-20 16:26:14,820 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:14,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 16:26:14,828 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:14,829 INFO L85 PathProgramCache]: Analyzing trace with hash -537588368, now seen corresponding path program 1 times [2022-11-20 16:26:14,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:14,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066711447] [2022-11-20 16:26:14,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:14,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 16:26:14,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:14,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066711447] [2022-11-20 16:26:14,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066711447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:14,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:14,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 16:26:14,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112672419] [2022-11-20 16:26:14,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:14,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 16:26:14,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:14,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 16:26:14,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 16:26:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:14,900 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:14,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 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) [2022-11-20 16:26:14,900 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:14,900 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:14,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:15,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:15,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 16:26:15,001 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:15,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:15,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1185139879, now seen corresponding path program 1 times [2022-11-20 16:26:15,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:15,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113255111] [2022-11-20 16:26:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:15,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 16:26:15,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:15,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113255111] [2022-11-20 16:26:15,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113255111] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 16:26:15,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934122311] [2022-11-20 16:26:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:15,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:15,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:15,096 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 16:26:15,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 16:26:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:15,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 16:26:15,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 16:26:15,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 16:26:15,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 16:26:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 16:26:15,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934122311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 16:26:15,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 16:26:15,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 16:26:15,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435569868] [2022-11-20 16:26:15,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 16:26:15,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 16:26:15,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:15,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 16:26:15,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 16:26:15,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:15,283 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:15,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 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) [2022-11-20 16:26:15,283 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:15,283 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:15,284 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:15,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:15,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:15,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 16:26:15,511 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 16:26:15,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 16:26:15,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:15,719 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 16:26:15,719 INFO L307 ceAbstractionStarter]: Result for error location checkThreadThread1of2ForFork1 was SAFE (1/3) [2022-11-20 16:26:15,721 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:15,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-11-20 16:26:15,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:15,723 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-11-20 16:26:15,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (8)] Waiting until timeout for monitored process [2022-11-20 16:26:15,732 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-11-20 16:26:15,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == checkThreadThread2of2ForFork1 ======== [2022-11-20 16:26:15,733 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2c1f83e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:15,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 16:26:15,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:15,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:15,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1877390047, now seen corresponding path program 1 times [2022-11-20 16:26:15,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:15,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076047145] [2022-11-20 16:26:15,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:15,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 16:26:15,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:15,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076047145] [2022-11-20 16:26:15,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076047145] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:15,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:15,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 16:26:15,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035382247] [2022-11-20 16:26:15,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:15,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 16:26:15,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:15,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 16:26:15,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 16:26:15,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:15,847 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:15,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 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) [2022-11-20 16:26:15,848 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:15,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:15,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 16:26:15,857 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:15,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:15,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1810383294, now seen corresponding path program 1 times [2022-11-20 16:26:15,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:15,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17128445] [2022-11-20 16:26:15,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:15,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 16:26:15,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:15,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17128445] [2022-11-20 16:26:15,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17128445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:15,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:15,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 16:26:15,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613935849] [2022-11-20 16:26:15,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:15,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 16:26:15,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:15,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 16:26:15,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 16:26:15,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:15,900 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:15,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2022-11-20 16:26:15,901 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:15,901 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:15,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:15,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:15,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 16:26:15,964 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:15,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:15,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1004643353, now seen corresponding path program 1 times [2022-11-20 16:26:15,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:15,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787188855] [2022-11-20 16:26:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:15,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 16:26:16,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:16,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787188855] [2022-11-20 16:26:16,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787188855] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 16:26:16,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857181498] [2022-11-20 16:26:16,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:16,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:16,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:16,070 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 16:26:16,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 16:26:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:16,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 16:26:16,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 16:26:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 16:26:16,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 16:26:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 16:26:16,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857181498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 16:26:16,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 16:26:16,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 16:26:16,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502289324] [2022-11-20 16:26:16,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 16:26:16,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 16:26:16,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:16,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 16:26:16,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 16:26:16,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:16,294 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:16,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 16:26:16,294 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:16,294 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:16,295 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 16:26:16,525 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 16:26:16,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 16:26:16,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 16:26:16,734 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 16:26:16,734 INFO L307 ceAbstractionStarter]: Result for error location checkThreadThread2of2ForFork1 was SAFE (2/3) [2022-11-20 16:26:16,739 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:16,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-11-20 16:26:16,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:16,741 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-11-20 16:26:16,751 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-11-20 16:26:16,751 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2022-11-20 16:26:16,752 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2c1f83e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:16,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 16:26:16,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (10)] Waiting until timeout for monitored process [2022-11-20 16:26:16,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 16:26:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:16,812 INFO L85 PathProgramCache]: Analyzing trace with hash -537437102, now seen corresponding path program 1 times [2022-11-20 16:26:16,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:16,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675016395] [2022-11-20 16:26:16,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:16,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:26:16,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:16,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675016395] [2022-11-20 16:26:16,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675016395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:16,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:16,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 16:26:16,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36322156] [2022-11-20 16:26:16,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:16,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 16:26:16,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:16,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 16:26:16,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 16:26:16,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:16,839 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:16,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 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) [2022-11-20 16:26:16,839 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:16,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 16:26:16,844 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 16:26:16,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:16,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1188043795, now seen corresponding path program 1 times [2022-11-20 16:26:16,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:16,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155990676] [2022-11-20 16:26:16,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:16,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:26:16,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:16,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155990676] [2022-11-20 16:26:16,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155990676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:16,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:16,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 16:26:16,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038755748] [2022-11-20 16:26:16,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:16,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 16:26:16,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:16,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 16:26:16,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 16:26:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:16,884 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:16,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2022-11-20 16:26:16,884 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:16,884 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:16,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:16,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:16,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 16:26:16,939 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 16:26:16,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:16,940 INFO L85 PathProgramCache]: Analyzing trace with hash 387530314, now seen corresponding path program 1 times [2022-11-20 16:26:16,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:16,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281839843] [2022-11-20 16:26:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:16,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:26:17,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:17,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281839843] [2022-11-20 16:26:17,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281839843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 16:26:17,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394449741] [2022-11-20 16:26:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:17,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:17,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:17,022 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 16:26:17,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 16:26:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:17,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 16:26:17,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 16:26:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:26:17,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 16:26:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:26:17,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394449741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 16:26:17,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 16:26:17,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 16:26:17,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128719343] [2022-11-20 16:26:17,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 16:26:17,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 16:26:17,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:17,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 16:26:17,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 16:26:17,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:17,252 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:17,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 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) [2022-11-20 16:26:17,253 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:17,253 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:17,253 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:17,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:17,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:17,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 16:26:17,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 16:26:17,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 16:26:17,541 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 16:26:17,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:17,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1103714139, now seen corresponding path program 1 times [2022-11-20 16:26:17,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:17,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899718038] [2022-11-20 16:26:17,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:17,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 16:26:17,570 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 16:26:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 16:26:17,605 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 16:26:17,606 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 16:26:17,606 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 16:26:17,606 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2022-11-20 16:26:17,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 16:26:17,608 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 16:26:17,608 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE,UNKNOWN (3/3) [2022-11-20 16:26:17,608 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 16:26:17,608 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 16:26:17,643 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2022-11-20 16:26:17,647 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:17,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-11-20 16:26:17,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:17,649 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-11-20 16:26:17,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (12)] Waiting until timeout for monitored process [2022-11-20 16:26:17,667 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-11-20 16:26:17,668 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2022-11-20 16:26:17,669 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2c1f83e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:17,669 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 16:26:17,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 16:26:17,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:17,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1469739100, now seen corresponding path program 1 times [2022-11-20 16:26:17,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:17,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780947604] [2022-11-20 16:26:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:17,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:17,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:17,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780947604] [2022-11-20 16:26:17,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780947604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:17,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:17,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 16:26:17,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823534152] [2022-11-20 16:26:17,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:17,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 16:26:17,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:17,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 16:26:17,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 16:26:17,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:17,777 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:17,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 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) [2022-11-20 16:26:17,777 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:17,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:17,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 16:26:17,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 16:26:17,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:17,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1477498459, now seen corresponding path program 1 times [2022-11-20 16:26:17,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:17,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050668957] [2022-11-20 16:26:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:17,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:17,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:17,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050668957] [2022-11-20 16:26:17,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050668957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:17,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:17,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 16:26:17,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632865491] [2022-11-20 16:26:17,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:17,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 16:26:17,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:17,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 16:26:17,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 16:26:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:17,833 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:17,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 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) [2022-11-20 16:26:17,834 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:17,834 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:17,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:17,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:17,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 16:26:17,902 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 16:26:17,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:17,902 INFO L85 PathProgramCache]: Analyzing trace with hash 110372144, now seen corresponding path program 1 times [2022-11-20 16:26:17,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:17,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664448035] [2022-11-20 16:26:17,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:17,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:17,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:17,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664448035] [2022-11-20 16:26:17,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664448035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 16:26:17,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686732463] [2022-11-20 16:26:17,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:17,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:17,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:17,992 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 16:26:17,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 16:26:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:18,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 16:26:18,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 16:26:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:18,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 16:26:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:18,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686732463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 16:26:18,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 16:26:18,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 16:26:18,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564340129] [2022-11-20 16:26:18,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 16:26:18,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 16:26:18,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:18,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 16:26:18,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 16:26:18,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:18,206 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:18,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2022-11-20 16:26:18,207 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:18,207 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:18,207 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:18,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:18,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:18,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 16:26:18,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 16:26:18,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:18,578 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 16:26:18,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:18,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1358272628, now seen corresponding path program 1 times [2022-11-20 16:26:18,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:18,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465977035] [2022-11-20 16:26:18,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:18,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-20 16:26:18,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:18,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465977035] [2022-11-20 16:26:18,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465977035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 16:26:18,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78814940] [2022-11-20 16:26:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:18,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:18,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:18,711 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 16:26:18,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 16:26:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:18,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 16:26:18,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 16:26:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:18,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 16:26:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:19,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78814940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 16:26:19,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 16:26:19,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-20 16:26:19,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351278998] [2022-11-20 16:26:19,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 16:26:19,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 16:26:19,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:19,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 16:26:19,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-11-20 16:26:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:19,175 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:19,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.789473684210526) internal successors, (186), 19 states have internal predecessors, (186), 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) [2022-11-20 16:26:19,175 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:19,175 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:19,176 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2022-11-20 16:26:19,176 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:19,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:19,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:19,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 16:26:19,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 16:26:19,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 16:26:19,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:19,502 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 16:26:19,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:19,502 INFO L85 PathProgramCache]: Analyzing trace with hash -394870116, now seen corresponding path program 1 times [2022-11-20 16:26:19,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:19,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486363059] [2022-11-20 16:26:19,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:19,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 16:26:19,519 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 16:26:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 16:26:19,539 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 16:26:19,539 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 16:26:19,539 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 16:26:19,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2022-11-20 16:26:19,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 16:26:19,541 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 16:26:19,541 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE,UNKNOWN (1/4) [2022-11-20 16:26:19,541 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 16:26:19,542 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-20 16:26:19,566 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2022-11-20 16:26:19,569 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:19,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-11-20 16:26:19,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:19,570 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-11-20 16:26:19,576 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-11-20 16:26:19,576 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == checkThreadThread4of4ForFork1 ======== [2022-11-20 16:26:19,576 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2c1f83e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:19,576 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 16:26:19,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (15)] Waiting until timeout for monitored process [2022-11-20 16:26:19,678 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:19,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:19,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1829361734, now seen corresponding path program 1 times [2022-11-20 16:26:19,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:19,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43900754] [2022-11-20 16:26:19,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:19,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:19,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:19,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43900754] [2022-11-20 16:26:19,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43900754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:19,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:19,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 16:26:19,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499990463] [2022-11-20 16:26:19,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:19,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 16:26:19,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:19,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 16:26:19,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 16:26:19,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:19,703 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:19,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 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) [2022-11-20 16:26:19,703 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:19,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:19,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 16:26:19,711 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:19,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:19,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1060191719, now seen corresponding path program 1 times [2022-11-20 16:26:19,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:19,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371966558] [2022-11-20 16:26:19,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:19,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:19,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:19,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371966558] [2022-11-20 16:26:19,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371966558] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:19,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:19,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 16:26:19,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411683560] [2022-11-20 16:26:19,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:19,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 16:26:19,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:19,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 16:26:19,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 16:26:19,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:19,754 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:19,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-11-20 16:26:19,754 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:19,755 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:19,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:19,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:19,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-20 16:26:19,845 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:19,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:19,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1649451298, now seen corresponding path program 1 times [2022-11-20 16:26:19,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:19,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627162853] [2022-11-20 16:26:19,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:19,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:19,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:19,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627162853] [2022-11-20 16:26:19,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627162853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 16:26:19,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405417215] [2022-11-20 16:26:19,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:19,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:19,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:19,935 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 16:26:19,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 16:26:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:20,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 16:26:20,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 16:26:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:20,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 16:26:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:20,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405417215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 16:26:20,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 16:26:20,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 16:26:20,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070999604] [2022-11-20 16:26:20,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 16:26:20,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 16:26:20,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:20,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 16:26:20,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 16:26:20,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:20,153 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:20,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 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) [2022-11-20 16:26:20,154 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:20,154 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:20,154 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:20,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:20,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:20,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 16:26:20,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 16:26:20,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:20,542 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:20,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:20,542 INFO L85 PathProgramCache]: Analyzing trace with hash -137869495, now seen corresponding path program 1 times [2022-11-20 16:26:20,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:20,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900782153] [2022-11-20 16:26:20,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:20,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-20 16:26:20,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:20,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900782153] [2022-11-20 16:26:20,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900782153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 16:26:20,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400987747] [2022-11-20 16:26:20,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:20,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:20,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:20,652 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 16:26:20,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 16:26:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:20,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 16:26:20,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 16:26:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:20,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 16:26:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:21,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400987747] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 16:26:21,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 16:26:21,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-20 16:26:21,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095205870] [2022-11-20 16:26:21,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 16:26:21,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 16:26:21,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:21,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 16:26:21,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-11-20 16:26:21,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:21,165 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:21,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.947368421052632) internal successors, (189), 19 states have internal predecessors, (189), 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) [2022-11-20 16:26:21,165 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:21,165 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:21,165 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2022-11-20 16:26:21,166 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:25,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 16:26:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 16:26:25,471 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 16:26:25,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 16:26:25,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 16:26:25,678 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 16:26:25,678 INFO L307 ceAbstractionStarter]: Result for error location checkThreadThread4of4ForFork1 was SAFE (1/5) [2022-11-20 16:26:25,681 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:25,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-11-20 16:26:25,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:25,682 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-11-20 16:26:25,696 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-11-20 16:26:25,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == checkThreadThread3of4ForFork1 ======== [2022-11-20 16:26:25,697 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2c1f83e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:25,698 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 16:26:25,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (18)] Waiting until timeout for monitored process [2022-11-20 16:26:25,801 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:25,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:25,801 INFO L85 PathProgramCache]: Analyzing trace with hash 814714362, now seen corresponding path program 1 times [2022-11-20 16:26:25,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:25,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945431674] [2022-11-20 16:26:25,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:25,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:26:25,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:25,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945431674] [2022-11-20 16:26:25,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945431674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:25,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:25,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 16:26:25,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763216015] [2022-11-20 16:26:25,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:25,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 16:26:25,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:25,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 16:26:25,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 16:26:25,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:25,823 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:25,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 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) [2022-11-20 16:26:25,824 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:25,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:25,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-20 16:26:25,832 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:25,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:25,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1847448935, now seen corresponding path program 1 times [2022-11-20 16:26:25,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:25,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894383412] [2022-11-20 16:26:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:25,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:26:25,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:25,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894383412] [2022-11-20 16:26:25,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894383412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:25,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:25,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 16:26:25,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568246636] [2022-11-20 16:26:25,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:25,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 16:26:25,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:25,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 16:26:25,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 16:26:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:25,872 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:25,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-11-20 16:26:25,872 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:25,873 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:25,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:25,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:25,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-20 16:26:25,945 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:25,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:25,945 INFO L85 PathProgramCache]: Analyzing trace with hash 406869022, now seen corresponding path program 1 times [2022-11-20 16:26:25,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:25,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255548765] [2022-11-20 16:26:25,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:25,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:26:26,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:26,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255548765] [2022-11-20 16:26:26,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255548765] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 16:26:26,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271027986] [2022-11-20 16:26:26,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:26,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:26,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:26,026 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 16:26:26,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 16:26:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:26,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 16:26:26,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 16:26:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:26:26,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 16:26:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:26:26,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271027986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 16:26:26,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 16:26:26,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 16:26:26,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297881330] [2022-11-20 16:26:26,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 16:26:26,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 16:26:26,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:26,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 16:26:26,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 16:26:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:26,286 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:26,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 16:26:26,286 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:26,286 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:26,287 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:26,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 16:26:26,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 16:26:26,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 16:26:26,651 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:26,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1400405047, now seen corresponding path program 1 times [2022-11-20 16:26:26,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:26,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888414037] [2022-11-20 16:26:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:26,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 16:26:26,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:26,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888414037] [2022-11-20 16:26:26,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888414037] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 16:26:26,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927679503] [2022-11-20 16:26:26,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:26,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:26,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:26,764 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 16:26:26,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 16:26:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:26,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 16:26:26,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 16:26:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:26:27,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 16:26:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:26:27,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927679503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 16:26:27,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 16:26:27,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-20 16:26:27,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686695265] [2022-11-20 16:26:27,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 16:26:27,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 16:26:27,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:27,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 16:26:27,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-11-20 16:26:27,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:27,241 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:27,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.68421052631579) internal successors, (184), 19 states have internal predecessors, (184), 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) [2022-11-20 16:26:27,242 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:27,242 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:27,242 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2022-11-20 16:26:27,242 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:30,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:30,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:30,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 16:26:30,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 16:26:30,342 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 16:26:30,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 16:26:30,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:30,543 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 16:26:30,543 INFO L307 ceAbstractionStarter]: Result for error location checkThreadThread3of4ForFork1 was SAFE (2/5) [2022-11-20 16:26:30,545 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:30,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-11-20 16:26:30,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:30,551 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-11-20 16:26:30,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (21)] Waiting until timeout for monitored process [2022-11-20 16:26:30,555 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-11-20 16:26:30,555 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2022-11-20 16:26:30,556 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2c1f83e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:30,556 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 16:26:30,666 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 16:26:30,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:30,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1148207270, now seen corresponding path program 1 times [2022-11-20 16:26:30,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:30,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826720391] [2022-11-20 16:26:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:30,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-20 16:26:30,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:30,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826720391] [2022-11-20 16:26:30,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826720391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:30,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:30,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 16:26:30,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770913015] [2022-11-20 16:26:30,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:30,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 16:26:30,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:30,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 16:26:30,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 16:26:30,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:30,696 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:30,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 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) [2022-11-20 16:26:30,696 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:30,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-20 16:26:30,703 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 16:26:30,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:30,703 INFO L85 PathProgramCache]: Analyzing trace with hash 939508967, now seen corresponding path program 1 times [2022-11-20 16:26:30,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:30,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109834176] [2022-11-20 16:26:30,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:30,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-20 16:26:30,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:30,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109834176] [2022-11-20 16:26:30,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109834176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:30,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:30,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 16:26:30,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152594743] [2022-11-20 16:26:30,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:30,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 16:26:30,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:30,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 16:26:30,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 16:26:30,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:30,747 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:30,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-11-20 16:26:30,747 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:30,747 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:30,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-20 16:26:30,893 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 16:26:30,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:30,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1147540734, now seen corresponding path program 1 times [2022-11-20 16:26:30,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:30,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740527180] [2022-11-20 16:26:30,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:30,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-20 16:26:30,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:30,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740527180] [2022-11-20 16:26:30,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740527180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 16:26:30,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031469536] [2022-11-20 16:26:30,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:30,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:30,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:31,003 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 16:26:31,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 16:26:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:31,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 16:26:31,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 16:26:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-20 16:26:31,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 16:26:31,256 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-20 16:26:31,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031469536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 16:26:31,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 16:26:31,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 16:26:31,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941655792] [2022-11-20 16:26:31,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 16:26:31,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 16:26:31,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:31,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 16:26:31,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 16:26:31,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:31,260 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:31,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 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) [2022-11-20 16:26:31,261 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:31,261 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:31,261 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:31,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:31,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:31,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 16:26:31,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 16:26:31,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:31,618 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 16:26:31,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:31,618 INFO L85 PathProgramCache]: Analyzing trace with hash -677371465, now seen corresponding path program 1 times [2022-11-20 16:26:31,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:31,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210772535] [2022-11-20 16:26:31,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:31,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-20 16:26:31,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:31,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210772535] [2022-11-20 16:26:31,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210772535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 16:26:31,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608263644] [2022-11-20 16:26:31,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:31,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:31,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:31,768 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 16:26:31,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 16:26:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:31,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 16:26:31,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 16:26:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-20 16:26:32,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 16:26:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-20 16:26:32,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608263644] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 16:26:32,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 16:26:32,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-20 16:26:32,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259671199] [2022-11-20 16:26:32,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 16:26:32,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 16:26:32,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:32,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 16:26:32,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-11-20 16:26:32,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:32,258 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:32,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.052631578947368) internal successors, (191), 19 states have internal predecessors, (191), 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) [2022-11-20 16:26:32,258 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:32,258 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:32,258 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2022-11-20 16:26:32,259 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:32,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:32,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:32,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 16:26:32,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 16:26:32,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 16:26:32,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:32,659 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 16:26:32,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:32,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1056843702, now seen corresponding path program 1 times [2022-11-20 16:26:32,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:32,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344503041] [2022-11-20 16:26:32,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:32,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 16:26:32,682 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 16:26:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 16:26:32,728 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 16:26:32,728 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 16:26:32,728 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 16:26:32,729 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2022-11-20 16:26:32,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-20 16:26:32,731 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 16:26:32,732 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE,UNKNOWN (3/5) [2022-11-20 16:26:32,732 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 16:26:32,732 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-20 16:26:32,778 INFO L144 ThreadInstanceAdder]: Constructed 20 joinOtherThreadTransitions. [2022-11-20 16:26:32,781 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:32,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-11-20 16:26:32,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:32,783 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-11-20 16:26:32,789 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-11-20 16:26:32,790 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == checkThreadThread3of5ForFork1 ======== [2022-11-20 16:26:32,790 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2c1f83e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:32,790 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 16:26:32,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (24)] Waiting until timeout for monitored process [2022-11-20 16:26:32,934 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:32,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:32,935 INFO L85 PathProgramCache]: Analyzing trace with hash -351814739, now seen corresponding path program 1 times [2022-11-20 16:26:32,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:32,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060551937] [2022-11-20 16:26:32,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:32,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:26:32,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:32,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060551937] [2022-11-20 16:26:32,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060551937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:32,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:32,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 16:26:32,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753035632] [2022-11-20 16:26:32,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:32,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 16:26:32,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:32,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 16:26:32,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 16:26:32,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:32,963 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:32,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 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) [2022-11-20 16:26:32,964 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:32,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:32,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-20 16:26:32,975 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:32,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:32,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1280989260, now seen corresponding path program 1 times [2022-11-20 16:26:32,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:32,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506707059] [2022-11-20 16:26:32,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:32,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:26:33,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:33,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506707059] [2022-11-20 16:26:33,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506707059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:33,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:33,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 16:26:33,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347257927] [2022-11-20 16:26:33,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:33,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 16:26:33,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:33,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 16:26:33,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 16:26:33,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:33,027 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:33,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-11-20 16:26:33,027 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:33,027 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:33,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:33,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-20 16:26:33,124 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:33,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:33,125 INFO L85 PathProgramCache]: Analyzing trace with hash 2010040941, now seen corresponding path program 1 times [2022-11-20 16:26:33,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:33,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111698354] [2022-11-20 16:26:33,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:33,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:26:33,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:33,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111698354] [2022-11-20 16:26:33,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111698354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 16:26:33,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247954923] [2022-11-20 16:26:33,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:33,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:33,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:33,215 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 16:26:33,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 16:26:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:33,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 16:26:33,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 16:26:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:26:33,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 16:26:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:26:33,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247954923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 16:26:33,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 16:26:33,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 16:26:33,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102279811] [2022-11-20 16:26:33,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 16:26:33,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 16:26:33,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:33,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 16:26:33,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 16:26:33,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:33,450 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:33,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 16:26:33,450 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:33,451 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:33,451 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:33,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:33,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:33,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 16:26:33,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 16:26:33,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-20 16:26:33,854 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:33,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:33,855 INFO L85 PathProgramCache]: Analyzing trace with hash 366071832, now seen corresponding path program 1 times [2022-11-20 16:26:33,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:33,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794193813] [2022-11-20 16:26:33,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:33,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 16:26:33,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:33,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794193813] [2022-11-20 16:26:33,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794193813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 16:26:33,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680377845] [2022-11-20 16:26:33,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:33,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:33,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:33,972 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 16:26:33,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 16:26:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:34,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 16:26:34,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 16:26:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:26:34,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 16:26:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 16:26:34,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680377845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 16:26:34,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 16:26:34,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-20 16:26:34,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287836926] [2022-11-20 16:26:34,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 16:26:34,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 16:26:34,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:34,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 16:26:34,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-11-20 16:26:34,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:34,443 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:34,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.68421052631579) internal successors, (184), 19 states have internal predecessors, (184), 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) [2022-11-20 16:26:34,444 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:34,444 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:34,444 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2022-11-20 16:26:34,444 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:52,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:52,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:52,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 16:26:52,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 16:26:52,039 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 16:26:52,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 16:26:52,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-20 16:26:52,242 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 16:26:52,243 INFO L307 ceAbstractionStarter]: Result for error location checkThreadThread3of5ForFork1 was SAFE (1/6) [2022-11-20 16:26:52,246 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:52,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-11-20 16:26:52,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:52,247 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-11-20 16:26:52,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (27)] Waiting until timeout for monitored process [2022-11-20 16:26:52,252 INFO L159 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-11-20 16:26:52,252 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == checkThreadThread4of5ForFork1 ======== [2022-11-20 16:26:52,253 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2c1f83e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 16:26:52,253 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 16:26:52,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:52,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:52,374 INFO L85 PathProgramCache]: Analyzing trace with hash -903161009, now seen corresponding path program 1 times [2022-11-20 16:26:52,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:52,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656138771] [2022-11-20 16:26:52,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:52,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:52,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:52,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656138771] [2022-11-20 16:26:52,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656138771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:52,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:52,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 16:26:52,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835703797] [2022-11-20 16:26:52,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:52,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 16:26:52,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:52,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 16:26:52,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 16:26:52,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:52,402 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:52,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 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) [2022-11-20 16:26:52,402 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:52,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-20 16:26:52,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:52,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:52,411 INFO L85 PathProgramCache]: Analyzing trace with hash -133990994, now seen corresponding path program 1 times [2022-11-20 16:26:52,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:52,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237178065] [2022-11-20 16:26:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:52,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:52,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:52,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237178065] [2022-11-20 16:26:52,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237178065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 16:26:52,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 16:26:52,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 16:26:52,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405116830] [2022-11-20 16:26:52,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 16:26:52,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 16:26:52,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:52,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 16:26:52,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 16:26:52,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:52,459 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:52,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-11-20 16:26:52,460 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:52,460 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:52,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:52,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:52,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-20 16:26:52,547 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:52,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:52,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1393629711, now seen corresponding path program 1 times [2022-11-20 16:26:52,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:52,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561191026] [2022-11-20 16:26:52,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:52,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:52,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:52,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561191026] [2022-11-20 16:26:52,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561191026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 16:26:52,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217383263] [2022-11-20 16:26:52,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:52,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:52,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:52,643 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 16:26:52,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 16:26:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:52,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 16:26:52,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 16:26:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:52,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 16:26:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:52,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217383263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 16:26:52,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 16:26:52,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 16:26:52,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917326597] [2022-11-20 16:26:52,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 16:26:52,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 16:26:52,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:52,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 16:26:52,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 16:26:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:52,926 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:52,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 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) [2022-11-20 16:26:52,927 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:52,927 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:52,927 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:53,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:53,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:53,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 16:26:53,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 16:26:53,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:53,311 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 16:26:53,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 16:26:53,312 INFO L85 PathProgramCache]: Analyzing trace with hash -25732998, now seen corresponding path program 1 times [2022-11-20 16:26:53,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 16:26:53,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453066371] [2022-11-20 16:26:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:53,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 16:26:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-20 16:26:53,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 16:26:53,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453066371] [2022-11-20 16:26:53,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453066371] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 16:26:53,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492724978] [2022-11-20 16:26:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 16:26:53,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 16:26:53,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 [2022-11-20 16:26:53,429 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 16:26:53,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b98f723c-02f0-4586-83f7-6459f2c52426/bin/ugemcutter-CCe4ZdLeKS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 16:26:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 16:26:53,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 16:26:53,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 16:26:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:53,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 16:26:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 16:26:53,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492724978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 16:26:53,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 16:26:53,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-20 16:26:53,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841446542] [2022-11-20 16:26:53,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 16:26:53,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 16:26:53,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 16:26:53,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 16:26:53,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-11-20 16:26:53,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:53,902 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-11-20 16:26:53,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.947368421052632) internal successors, (189), 19 states have internal predecessors, (189), 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) [2022-11-20 16:26:53,902 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-11-20 16:26:53,902 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2022-11-20 16:26:53,903 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2022-11-20 16:26:53,903 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states.