./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_374ccf78-9524-4ff7-bf13-9f127066e7eb/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_374ccf78-9524-4ff7-bf13-9f127066e7eb/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_374ccf78-9524-4ff7-bf13-9f127066e7eb/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_374ccf78-9524-4ff7-bf13-9f127066e7eb/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_374ccf78-9524-4ff7-bf13-9f127066e7eb/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_374ccf78-9524-4ff7-bf13-9f127066e7eb/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 16d5feefc85136540ef4669433de80b700c3a57c51c2b65f22ef098d8e79a29f --- 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-b5237d8 [2022-11-21 16:39:15,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:39:15,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:39:15,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:39:15,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:39:15,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:39:15,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:39:15,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:39:15,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:39:15,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:39:15,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:39:15,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:39:15,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:39:15,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:39:15,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:39:15,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:39:15,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:39:15,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:39:15,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:39:15,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:39:15,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:39:15,686 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:39:15,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:39:15,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:39:15,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:39:15,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:39:15,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:39:15,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:39:15,705 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:39:15,706 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:39:15,706 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:39:15,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:39:15,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:39:15,708 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:39:15,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:39:15,709 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:39:15,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:39:15,710 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:39:15,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:39:15,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:39:15,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:39:15,718 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_374ccf78-9524-4ff7-bf13-9f127066e7eb/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:39:15,753 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:39:15,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:39:15,754 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:39:15,754 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:39:15,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:39:15,755 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:39:15,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:39:15,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:39:15,758 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:39:15,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:39:15,759 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:39:15,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:39:15,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:39:15,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:39:15,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:39:15,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:39:15,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:39:15,760 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:39:15,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:39:15,761 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:39:15,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:39:15,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:39:15,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:39:15,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:39:15,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:39:15,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:39:15,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:39:15,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:39:15,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:39:15,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:39:15,763 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:39:15,763 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:39:15,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:39:15,764 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_374ccf78-9524-4ff7-bf13-9f127066e7eb/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_374ccf78-9524-4ff7-bf13-9f127066e7eb/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16d5feefc85136540ef4669433de80b700c3a57c51c2b65f22ef098d8e79a29f [2022-11-21 16:39:16,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:39:16,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:39:16,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:39:16,071 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:39:16,071 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:39:16,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_374ccf78-9524-4ff7-bf13-9f127066e7eb/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-21 16:39:19,116 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:39:19,449 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:39:19,449 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_374ccf78-9524-4ff7-bf13-9f127066e7eb/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-21 16:39:19,459 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_374ccf78-9524-4ff7-bf13-9f127066e7eb/bin/uautomizer-vX5HgA9Q3a/data/356d8a142/55e026257efd493290c58c7a43ae1d04/FLAG400b769c4 [2022-11-21 16:39:19,475 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_374ccf78-9524-4ff7-bf13-9f127066e7eb/bin/uautomizer-vX5HgA9Q3a/data/356d8a142/55e026257efd493290c58c7a43ae1d04 [2022-11-21 16:39:19,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:39:19,479 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:39:19,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:39:19,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:39:19,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:39:19,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:39:19" (1/1) ... [2022-11-21 16:39:19,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@275f6bc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:19, skipping insertion in model container [2022-11-21 16:39:19,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:39:19" (1/1) ... [2022-11-21 16:39:19,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:39:19,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:39:19,711 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_374ccf78-9524-4ff7-bf13-9f127066e7eb/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2022-11-21 16:39:19,742 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:39:19,757 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:39:19,807 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_374ccf78-9524-4ff7-bf13-9f127066e7eb/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2022-11-21 16:39:19,847 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:39:19,869 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:39:19,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:19 WrapperNode [2022-11-21 16:39:19,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:39:19,871 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:39:19,871 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:39:19,871 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:39:19,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:19" (1/1) ... [2022-11-21 16:39:19,887 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:19" (1/1) ... [2022-11-21 16:39:19,922 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 423 [2022-11-21 16:39:19,922 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:39:19,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:39:19,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:39:19,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:39:19,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:19" (1/1) ... [2022-11-21 16:39:19,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:19" (1/1) ... [2022-11-21 16:39:19,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:19" (1/1) ... [2022-11-21 16:39:19,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:19" (1/1) ... [2022-11-21 16:39:19,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:19" (1/1) ... [2022-11-21 16:39:19,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:19" (1/1) ... [2022-11-21 16:39:19,985 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:19" (1/1) ... [2022-11-21 16:39:19,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:19" (1/1) ... [2022-11-21 16:39:19,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:39:19,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:39:20,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:39:20,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:39:20,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:19" (1/1) ... [2022-11-21 16:39:20,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:39:20,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_374ccf78-9524-4ff7-bf13-9f127066e7eb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:39:20,045 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_374ccf78-9524-4ff7-bf13-9f127066e7eb/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:39:20,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_374ccf78-9524-4ff7-bf13-9f127066e7eb/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:39:20,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:39:20,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:39:20,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:39:20,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:39:20,235 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:39:20,238 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:39:20,739 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:39:20,747 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:39:20,747 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-21 16:39:20,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:39:20 BoogieIcfgContainer [2022-11-21 16:39:20,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:39:20,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:39:20,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:39:20,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:39:20,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:39:19" (1/3) ... [2022-11-21 16:39:20,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47db7cc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:39:20, skipping insertion in model container [2022-11-21 16:39:20,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:19" (2/3) ... [2022-11-21 16:39:20,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47db7cc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:39:20, skipping insertion in model container [2022-11-21 16:39:20,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:39:20" (3/3) ... [2022-11-21 16:39:20,760 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-21 16:39:20,791 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:39:20,791 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:39:20,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:39:20,888 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1ada95a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:39:20,889 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:39:20,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 110 states have (on average 1.6818181818181819) internal successors, (185), 111 states have internal predecessors, (185), 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) [2022-11-21 16:39:20,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-21 16:39:20,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:39:20,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:39:20,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:39:20,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:20,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2117585175, now seen corresponding path program 1 times [2022-11-21 16:39:20,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:39:20,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547416058] [2022-11-21 16:39:20,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:20,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:39:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:39:21,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:39:21,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:39:21,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547416058] [2022-11-21 16:39:21,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547416058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:39:21,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:39:21,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:39:21,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396522658] [2022-11-21 16:39:21,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:39:21,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:39:21,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:39:21,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:39:21,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:39:21,406 INFO L87 Difference]: Start difference. First operand has 112 states, 110 states have (on average 1.6818181818181819) internal successors, (185), 111 states have internal predecessors, (185), 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) Second operand 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) [2022-11-21 16:39:21,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:39:21,493 INFO L93 Difference]: Finished difference Result 266 states and 425 transitions. [2022-11-21 16:39:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:39:21,495 INFO L78 Accepts]: Start accepts. 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) Word has length 49 [2022-11-21 16:39:21,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:39:21,507 INFO L225 Difference]: With dead ends: 266 [2022-11-21 16:39:21,507 INFO L226 Difference]: Without dead ends: 175 [2022-11-21 16:39:21,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:39:21,514 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 130 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:39:21,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 384 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:39:21,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-21 16:39:21,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2022-11-21 16:39:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.505813953488372) internal successors, (259), 172 states have internal predecessors, (259), 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) [2022-11-21 16:39:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 259 transitions. [2022-11-21 16:39:21,578 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 259 transitions. Word has length 49 [2022-11-21 16:39:21,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:39:21,578 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 259 transitions. [2022-11-21 16:39:21,579 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) [2022-11-21 16:39:21,579 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 259 transitions. [2022-11-21 16:39:21,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-21 16:39:21,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:39:21,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:39:21,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:39:21,582 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:39:21,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:21,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1419109229, now seen corresponding path program 1 times [2022-11-21 16:39:21,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:39:21,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586763080] [2022-11-21 16:39:21,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:21,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:39:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:39:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:39:21,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:39:21,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586763080] [2022-11-21 16:39:21,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586763080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:39:21,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:39:21,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:39:21,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132131184] [2022-11-21 16:39:21,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:39:21,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:39:21,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:39:21,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:39:21,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:39:21,770 INFO L87 Difference]: Start difference. First operand 173 states and 259 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2022-11-21 16:39:21,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:39:21,844 INFO L93 Difference]: Finished difference Result 433 states and 671 transitions. [2022-11-21 16:39:21,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:39:21,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) Word has length 50 [2022-11-21 16:39:21,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:39:21,854 INFO L225 Difference]: With dead ends: 433 [2022-11-21 16:39:21,854 INFO L226 Difference]: Without dead ends: 287 [2022-11-21 16:39:21,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:39:21,856 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 108 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:39:21,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 329 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:39:21,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-21 16:39:21,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 285. [2022-11-21 16:39:21,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.5352112676056338) internal successors, (436), 284 states have internal predecessors, (436), 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) [2022-11-21 16:39:21,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 436 transitions. [2022-11-21 16:39:21,946 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 436 transitions. Word has length 50 [2022-11-21 16:39:21,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:39:21,947 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 436 transitions. [2022-11-21 16:39:21,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2022-11-21 16:39:21,948 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 436 transitions. [2022-11-21 16:39:21,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:39:21,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:39:21,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:39:21,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:39:21,950 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:39:21,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:21,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1570665396, now seen corresponding path program 1 times [2022-11-21 16:39:21,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:39:21,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627095887] [2022-11-21 16:39:21,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:21,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:39:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:39:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:39:22,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:39:22,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627095887] [2022-11-21 16:39:22,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627095887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:39:22,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:39:22,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:39:22,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728123608] [2022-11-21 16:39:22,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:39:22,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:39:22,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:39:22,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:39:22,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:39:22,160 INFO L87 Difference]: Start difference. First operand 285 states and 436 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2022-11-21 16:39:22,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:39:22,240 INFO L93 Difference]: Finished difference Result 737 states and 1150 transitions. [2022-11-21 16:39:22,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:39:22,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) Word has length 51 [2022-11-21 16:39:22,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:39:22,244 INFO L225 Difference]: With dead ends: 737 [2022-11-21 16:39:22,244 INFO L226 Difference]: Without dead ends: 479 [2022-11-21 16:39:22,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:39:22,247 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 103 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:39:22,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 314 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:39:22,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-21 16:39:22,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 477. [2022-11-21 16:39:22,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.546218487394958) internal successors, (736), 476 states have internal predecessors, (736), 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) [2022-11-21 16:39:22,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 736 transitions. [2022-11-21 16:39:22,307 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 736 transitions. Word has length 51 [2022-11-21 16:39:22,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:39:22,308 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 736 transitions. [2022-11-21 16:39:22,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2022-11-21 16:39:22,308 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 736 transitions. [2022-11-21 16:39:22,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-21 16:39:22,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:39:22,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:39:22,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:39:22,310 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:39:22,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:22,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1205622842, now seen corresponding path program 1 times [2022-11-21 16:39:22,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:39:22,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346210700] [2022-11-21 16:39:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:22,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:39:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:39:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:39:22,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:39:22,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346210700] [2022-11-21 16:39:22,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346210700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:39:22,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:39:22,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:39:22,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052447675] [2022-11-21 16:39:22,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:39:22,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:39:22,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:39:22,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:39:22,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:39:22,487 INFO L87 Difference]: Start difference. First operand 477 states and 736 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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) [2022-11-21 16:39:22,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:39:22,946 INFO L93 Difference]: Finished difference Result 2727 states and 4281 transitions. [2022-11-21 16:39:22,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:39:22,947 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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) Word has length 52 [2022-11-21 16:39:22,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:39:22,961 INFO L225 Difference]: With dead ends: 2727 [2022-11-21 16:39:22,962 INFO L226 Difference]: Without dead ends: 2277 [2022-11-21 16:39:22,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:39:22,977 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 1016 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:39:22,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 1218 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:39:22,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2022-11-21 16:39:23,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 925. [2022-11-21 16:39:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 1.5454545454545454) internal successors, (1428), 924 states have internal predecessors, (1428), 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) [2022-11-21 16:39:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1428 transitions. [2022-11-21 16:39:23,189 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1428 transitions. Word has length 52 [2022-11-21 16:39:23,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:39:23,190 INFO L495 AbstractCegarLoop]: Abstraction has 925 states and 1428 transitions. [2022-11-21 16:39:23,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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) [2022-11-21 16:39:23,191 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1428 transitions. [2022-11-21 16:39:23,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-21 16:39:23,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:39:23,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:39:23,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:39:23,200 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:39:23,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:23,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1299853839, now seen corresponding path program 1 times [2022-11-21 16:39:23,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:39:23,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066861144] [2022-11-21 16:39:23,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:23,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:39:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:39:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:39:23,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:39:23,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066861144] [2022-11-21 16:39:23,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066861144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:39:23,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:39:23,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:39:23,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167496786] [2022-11-21 16:39:23,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:39:23,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:39:23,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:39:23,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:39:23,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:39:23,467 INFO L87 Difference]: Start difference. First operand 925 states and 1428 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2022-11-21 16:39:24,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:39:24,203 INFO L93 Difference]: Finished difference Result 4029 states and 6232 transitions. [2022-11-21 16:39:24,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:39:24,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) Word has length 53 [2022-11-21 16:39:24,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:39:24,217 INFO L225 Difference]: With dead ends: 4029 [2022-11-21 16:39:24,217 INFO L226 Difference]: Without dead ends: 3131 [2022-11-21 16:39:24,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:39:24,226 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 509 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:39:24,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 739 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:39:24,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2022-11-21 16:39:24,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3125. [2022-11-21 16:39:24,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3125 states, 3124 states have (on average 1.5403329065300897) internal successors, (4812), 3124 states have internal predecessors, (4812), 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) [2022-11-21 16:39:24,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 4812 transitions. [2022-11-21 16:39:24,787 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 4812 transitions. Word has length 53 [2022-11-21 16:39:24,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:39:24,788 INFO L495 AbstractCegarLoop]: Abstraction has 3125 states and 4812 transitions. [2022-11-21 16:39:24,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2022-11-21 16:39:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 4812 transitions. [2022-11-21 16:39:24,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-21 16:39:24,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:39:24,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:39:24,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:39:24,797 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:39:24,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:24,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1774851107, now seen corresponding path program 1 times [2022-11-21 16:39:24,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:39:24,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13587265] [2022-11-21 16:39:24,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:24,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:39:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:39:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:39:24,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:39:24,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13587265] [2022-11-21 16:39:24,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13587265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:39:24,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:39:24,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:39:24,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209247990] [2022-11-21 16:39:24,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:39:24,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:39:24,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:39:24,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:39:24,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:39:24,896 INFO L87 Difference]: Start difference. First operand 3125 states and 4812 transitions. Second operand 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) [2022-11-21 16:39:25,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:39:25,910 INFO L93 Difference]: Finished difference Result 8249 states and 12654 transitions. [2022-11-21 16:39:25,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:39:25,911 INFO L78 Accepts]: Start accepts. 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) Word has length 54 [2022-11-21 16:39:25,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:39:25,929 INFO L225 Difference]: With dead ends: 8249 [2022-11-21 16:39:25,930 INFO L226 Difference]: Without dead ends: 5151 [2022-11-21 16:39:25,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:39:25,934 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 115 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:39:25,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 369 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:39:25,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2022-11-21 16:39:26,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 5149. [2022-11-21 16:39:26,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5149 states, 5148 states have (on average 1.5159285159285159) internal successors, (7804), 5148 states have internal predecessors, (7804), 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) [2022-11-21 16:39:26,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5149 states to 5149 states and 7804 transitions. [2022-11-21 16:39:26,692 INFO L78 Accepts]: Start accepts. Automaton has 5149 states and 7804 transitions. Word has length 54 [2022-11-21 16:39:26,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:39:26,692 INFO L495 AbstractCegarLoop]: Abstraction has 5149 states and 7804 transitions. [2022-11-21 16:39:26,693 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) [2022-11-21 16:39:26,693 INFO L276 IsEmpty]: Start isEmpty. Operand 5149 states and 7804 transitions. [2022-11-21 16:39:26,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:39:26,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:39:26,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:39:26,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:39:26,695 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:39:26,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:26,696 INFO L85 PathProgramCache]: Analyzing trace with hash -850826877, now seen corresponding path program 1 times [2022-11-21 16:39:26,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:39:26,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255609711] [2022-11-21 16:39:26,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:26,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:39:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:39:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:39:27,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:39:27,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255609711] [2022-11-21 16:39:27,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255609711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:39:27,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:39:27,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:39:27,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91879217] [2022-11-21 16:39:27,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:39:27,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:39:27,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:39:27,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:39:27,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:39:27,017 INFO L87 Difference]: Start difference. First operand 5149 states and 7804 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2022-11-21 16:39:28,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:39:28,644 INFO L93 Difference]: Finished difference Result 10527 states and 15837 transitions. [2022-11-21 16:39:28,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:39:28,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) Word has length 55 [2022-11-21 16:39:28,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:39:28,688 INFO L225 Difference]: With dead ends: 10527 [2022-11-21 16:39:28,689 INFO L226 Difference]: Without dead ends: 10525 [2022-11-21 16:39:28,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:39:28,693 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 248 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:39:28,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 771 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:39:28,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10525 states. [2022-11-21 16:39:29,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10525 to 5405. [2022-11-21 16:39:29,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5405 states, 5404 states have (on average 1.4914877868245744) internal successors, (8060), 5404 states have internal predecessors, (8060), 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) [2022-11-21 16:39:29,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5405 states to 5405 states and 8060 transitions. [2022-11-21 16:39:29,921 INFO L78 Accepts]: Start accepts. Automaton has 5405 states and 8060 transitions. Word has length 55 [2022-11-21 16:39:29,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:39:29,921 INFO L495 AbstractCegarLoop]: Abstraction has 5405 states and 8060 transitions. [2022-11-21 16:39:29,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2022-11-21 16:39:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 5405 states and 8060 transitions. [2022-11-21 16:39:29,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-21 16:39:29,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:39:29,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:39:29,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:39:29,923 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:39:29,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:29,924 INFO L85 PathProgramCache]: Analyzing trace with hash -595256360, now seen corresponding path program 1 times [2022-11-21 16:39:29,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:39:29,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132610267] [2022-11-21 16:39:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:29,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:39:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:39:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:39:29,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:39:29,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132610267] [2022-11-21 16:39:29,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132610267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:39:29,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:39:29,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:39:29,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235585092] [2022-11-21 16:39:29,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:39:29,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:39:29,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:39:29,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:39:29,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:39:29,990 INFO L87 Difference]: Start difference. First operand 5405 states and 8060 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2022-11-21 16:39:31,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:39:31,295 INFO L93 Difference]: Finished difference Result 13259 states and 19788 transitions. [2022-11-21 16:39:31,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:39:31,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) Word has length 56 [2022-11-21 16:39:31,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:39:31,336 INFO L225 Difference]: With dead ends: 13259 [2022-11-21 16:39:31,337 INFO L226 Difference]: Without dead ends: 7881 [2022-11-21 16:39:31,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:39:31,345 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 92 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:39:31,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 281 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:39:31,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7881 states. [2022-11-21 16:39:32,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7881 to 7823. [2022-11-21 16:39:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7823 states, 7822 states have (on average 1.4812068524673996) internal successors, (11586), 7822 states have internal predecessors, (11586), 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) [2022-11-21 16:39:32,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7823 states to 7823 states and 11586 transitions. [2022-11-21 16:39:32,499 INFO L78 Accepts]: Start accepts. Automaton has 7823 states and 11586 transitions. Word has length 56 [2022-11-21 16:39:32,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:39:32,500 INFO L495 AbstractCegarLoop]: Abstraction has 7823 states and 11586 transitions. [2022-11-21 16:39:32,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2022-11-21 16:39:32,500 INFO L276 IsEmpty]: Start isEmpty. Operand 7823 states and 11586 transitions. [2022-11-21 16:39:32,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-21 16:39:32,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:39:32,506 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:39:32,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:39:32,508 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:39:32,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:32,509 INFO L85 PathProgramCache]: Analyzing trace with hash -264442661, now seen corresponding path program 1 times [2022-11-21 16:39:32,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:39:32,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778913062] [2022-11-21 16:39:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:32,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:39:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:39:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:39:33,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:39:33,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778913062] [2022-11-21 16:39:33,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778913062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:39:33,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627675743] [2022-11-21 16:39:33,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:33,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:39:33,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_374ccf78-9524-4ff7-bf13-9f127066e7eb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:39:33,083 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_374ccf78-9524-4ff7-bf13-9f127066e7eb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:39:33,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_374ccf78-9524-4ff7-bf13-9f127066e7eb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:39:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:39:33,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:39:33,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:39:33,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:39:33,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:39:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:39:33,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627675743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:39:33,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:39:33,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2022-11-21 16:39:33,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930670967] [2022-11-21 16:39:33,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:39:33,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:39:33,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:39:33,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:39:33,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:39:33,929 INFO L87 Difference]: Start difference. First operand 7823 states and 11586 transitions. Second operand has 14 states, 14 states have (on average 16.071428571428573) internal successors, (225), 14 states have internal predecessors, (225), 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) [2022-11-21 16:40:12,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:40:12,357 INFO L93 Difference]: Finished difference Result 164215 states and 240340 transitions. [2022-11-21 16:40:12,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-11-21 16:40:12,358 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 16.071428571428573) internal successors, (225), 14 states have internal predecessors, (225), 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) Word has length 79 [2022-11-21 16:40:12,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:40:12,994 INFO L225 Difference]: With dead ends: 164215 [2022-11-21 16:40:12,994 INFO L226 Difference]: Without dead ends: 156421 [2022-11-21 16:40:13,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8046 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3160, Invalid=15200, Unknown=0, NotChecked=0, Total=18360 [2022-11-21 16:40:13,121 INFO L413 NwaCegarLoop]: 646 mSDtfsCounter, 11254 mSDsluCounter, 3372 mSDsCounter, 0 mSdLazyCounter, 3623 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11254 SdHoareTripleChecker+Valid, 4018 SdHoareTripleChecker+Invalid, 3706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:40:13,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11254 Valid, 4018 Invalid, 3706 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [83 Valid, 3623 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-21 16:40:13,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156421 states.