./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc --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 64bit --witnessprinter.graph.data.programhash 71db3ddd8c41e0e55165084822cc484764b1b1fea6b2ce41ef188424a7fe2ced --- 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-5e519f3 [2022-11-02 20:23:12,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:23:12,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:23:12,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:23:12,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:23:12,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:23:12,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:23:12,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:23:12,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:23:12,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:23:12,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:23:12,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:23:12,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:23:12,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:23:12,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:23:12,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:23:12,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:23:12,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:23:12,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:23:12,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:23:12,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:23:12,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:23:12,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:23:12,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:23:12,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:23:12,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:23:12,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:23:12,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:23:12,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:23:12,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:23:12,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:23:12,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:23:12,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:23:12,580 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:23:12,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:23:12,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:23:12,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:23:12,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:23:12,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:23:12,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:23:12,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:23:12,587 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 20:23:12,636 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:23:12,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:23:12,637 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:23:12,637 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:23:12,638 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:23:12,638 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:23:12,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:23:12,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:23:12,640 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:23:12,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:23:12,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:23:12,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:23:12,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:23:12,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:23:12,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:23:12,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:23:12,643 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:23:12,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:23:12,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:23:12,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:23:12,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:23:12,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:23:12,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:23:12,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:23:12,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:23:12,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:23:12,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:23:12,648 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:23:12,648 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:23:12,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:23:12,649 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_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71db3ddd8c41e0e55165084822cc484764b1b1fea6b2ce41ef188424a7fe2ced [2022-11-02 20:23:13,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:23:13,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:23:13,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:23:13,071 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:23:13,072 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:23:13,073 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c [2022-11-02 20:23:13,157 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/data/d9503adc5/a1d89b27c82845e482d1196084408cc8/FLAGb4c7586e6 [2022-11-02 20:23:13,841 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:23:13,842 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c [2022-11-02 20:23:13,852 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/data/d9503adc5/a1d89b27c82845e482d1196084408cc8/FLAGb4c7586e6 [2022-11-02 20:23:14,118 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/data/d9503adc5/a1d89b27c82845e482d1196084408cc8 [2022-11-02 20:23:14,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:23:14,129 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:23:14,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:23:14,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:23:14,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:23:14,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:23:14" (1/1) ... [2022-11-02 20:23:14,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e3b1545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:14, skipping insertion in model container [2022-11-02 20:23:14,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:23:14" (1/1) ... [2022-11-02 20:23:14,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:23:14,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:23:14,367 WARN L230 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_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c[1107,1120] [2022-11-02 20:23:14,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:23:14,479 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:23:14,490 WARN L230 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_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c[1107,1120] [2022-11-02 20:23:14,606 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:23:14,632 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:23:14,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:14 WrapperNode [2022-11-02 20:23:14,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:23:14,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:23:14,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:23:14,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:23:14,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:14" (1/1) ... [2022-11-02 20:23:14,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:14" (1/1) ... [2022-11-02 20:23:14,736 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 604 [2022-11-02 20:23:14,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:23:14,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:23:14,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:23:14,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:23:14,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:14" (1/1) ... [2022-11-02 20:23:14,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:14" (1/1) ... [2022-11-02 20:23:14,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:14" (1/1) ... [2022-11-02 20:23:14,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:14" (1/1) ... [2022-11-02 20:23:14,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:14" (1/1) ... [2022-11-02 20:23:14,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:14" (1/1) ... [2022-11-02 20:23:14,782 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:14" (1/1) ... [2022-11-02 20:23:14,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:14" (1/1) ... [2022-11-02 20:23:14,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:23:14,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:23:14,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:23:14,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:23:14,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:14" (1/1) ... [2022-11-02 20:23:14,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:23:14,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:23:14,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:23:14,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:23:14,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:23:14,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:23:15,142 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:23:15,144 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:23:16,074 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:23:16,084 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:23:16,085 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:23:16,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:23:16 BoogieIcfgContainer [2022-11-02 20:23:16,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:23:16,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:23:16,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:23:16,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:23:16,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:23:14" (1/3) ... [2022-11-02 20:23:16,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f006e50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:23:16, skipping insertion in model container [2022-11-02 20:23:16,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:14" (2/3) ... [2022-11-02 20:23:16,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f006e50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:23:16, skipping insertion in model container [2022-11-02 20:23:16,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:23:16" (3/3) ... [2022-11-02 20:23:16,099 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c [2022-11-02 20:23:16,122 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:23:16,123 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:23:16,198 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:23:16,205 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;@22b08019, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:23:16,206 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:23:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 93 states have (on average 1.4946236559139785) internal successors, (139), 94 states have internal predecessors, (139), 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) [2022-11-02 20:23:16,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-02 20:23:16,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:16,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-02 20:23:16,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:16,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:16,226 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-02 20:23:16,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:16,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027756695] [2022-11-02 20:23:16,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:16,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:23:16,607 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:23:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:23:16,743 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:23:16,745 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:23:16,746 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-02 20:23:16,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:23:16,753 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-02 20:23:16,757 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-02 20:23:16,780 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-02 20:23:16,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 08:23:16 BoogieIcfgContainer [2022-11-02 20:23:16,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-02 20:23:16,789 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-02 20:23:16,789 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-02 20:23:16,790 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-02 20:23:16,790 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:23:16" (3/4) ... [2022-11-02 20:23:16,794 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-02 20:23:16,794 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-02 20:23:16,795 INFO L158 Benchmark]: Toolchain (without parser) took 2665.93ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 61.5MB in the beginning and 84.4MB in the end (delta: -22.9MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:23:16,796 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 102.8MB. Free memory is still 78.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:23:16,796 INFO L158 Benchmark]: CACSL2BoogieTranslator took 502.24ms. Allocated memory is still 102.8MB. Free memory was 61.3MB in the beginning and 68.0MB in the end (delta: -6.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-02 20:23:16,797 INFO L158 Benchmark]: Boogie Procedure Inliner took 103.10ms. Allocated memory is still 102.8MB. Free memory was 68.0MB in the beginning and 61.7MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-02 20:23:16,798 INFO L158 Benchmark]: Boogie Preprocessor took 55.23ms. Allocated memory is still 102.8MB. Free memory was 61.7MB in the beginning and 58.0MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-02 20:23:16,798 INFO L158 Benchmark]: RCFGBuilder took 1294.36ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 58.0MB in the beginning and 72.5MB in the end (delta: -14.5MB). Peak memory consumption was 34.6MB. Max. memory is 16.1GB. [2022-11-02 20:23:16,799 INFO L158 Benchmark]: TraceAbstraction took 697.91ms. Allocated memory is still 123.7MB. Free memory was 71.9MB in the beginning and 85.2MB in the end (delta: -13.4MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-02 20:23:16,799 INFO L158 Benchmark]: Witness Printer took 4.68ms. Allocated memory is still 123.7MB. Free memory was 85.2MB in the beginning and 84.4MB in the end (delta: 839.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:23:16,803 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 102.8MB. Free memory is still 78.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 502.24ms. Allocated memory is still 102.8MB. Free memory was 61.3MB in the beginning and 68.0MB in the end (delta: -6.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 103.10ms. Allocated memory is still 102.8MB. Free memory was 68.0MB in the beginning and 61.7MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.23ms. Allocated memory is still 102.8MB. Free memory was 61.7MB in the beginning and 58.0MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1294.36ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 58.0MB in the beginning and 72.5MB in the end (delta: -14.5MB). Peak memory consumption was 34.6MB. Max. memory is 16.1GB. * TraceAbstraction took 697.91ms. Allocated memory is still 123.7MB. Free memory was 71.9MB in the beginning and 85.2MB in the end (delta: -13.4MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 4.68ms. Allocated memory is still 123.7MB. Free memory was 85.2MB in the beginning and 84.4MB in the end (delta: 839.1kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 156, overapproximation of bitwiseOr at line 165, overapproximation of bitwiseAnd at line 150. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 8); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (8 - 1); [L31] const SORT_10 mask_SORT_10 = (SORT_10)-1 >> (sizeof(SORT_10) * 8 - 32); [L32] const SORT_10 msb_SORT_10 = (SORT_10)1 << (32 - 1); [L34] const SORT_32 mask_SORT_32 = (SORT_32)-1 >> (sizeof(SORT_32) * 8 - 4); [L35] const SORT_32 msb_SORT_32 = (SORT_32)1 << (4 - 1); [L37] const SORT_68 mask_SORT_68 = (SORT_68)-1 >> (sizeof(SORT_68) * 8 - 10); [L38] const SORT_68 msb_SORT_68 = (SORT_68)1 << (10 - 1); [L40] const SORT_1 var_7 = 0; [L41] const SORT_10 var_12 = 1; [L42] const SORT_1 var_22 = 1; [L43] const SORT_68 var_69 = 0; [L44] const SORT_10 var_119 = 104; [L46] SORT_1 input_2; [L47] SORT_3 input_4; [L48] SORT_1 input_5; [L49] SORT_1 input_6; [L50] SORT_1 input_30; [L51] SORT_32 input_33; [L52] SORT_1 input_35; [L53] SORT_32 input_37; [L54] SORT_1 input_39; [L55] SORT_1 input_45; [L56] SORT_1 input_47; [L57] SORT_1 input_49; [L58] SORT_3 input_53; [L59] SORT_1 input_56; [L60] SORT_1 input_66; [L61] SORT_1 input_75; [L62] SORT_1 input_81; [L63] SORT_1 input_85; [L64] SORT_1 input_95; [L65] SORT_1 input_101; [L66] SORT_1 input_107; [L67] SORT_1 input_113; [L68] SORT_1 input_114; [L69] SORT_1 input_115; [L70] SORT_1 input_132; [L71] SORT_68 input_139; [L72] SORT_1 input_147; [L73] SORT_1 input_148; [L74] SORT_1 input_149; [L76] SORT_1 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L77] SORT_1 state_15 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L78] SORT_1 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L79] SORT_1 state_28 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L80] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L81] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L82] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L83] SORT_1 state_58 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L84] SORT_1 state_60 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L85] SORT_1 state_62 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L86] SORT_1 state_64 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L87] SORT_68 state_70 = __VERIFIER_nondet_ushort() & mask_SORT_68; [L88] SORT_1 state_72 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L90] SORT_1 init_9_arg_1 = var_7; [L91] state_8 = init_9_arg_1 [L92] SORT_1 init_16_arg_1 = var_7; [L93] state_15 = init_16_arg_1 [L94] SORT_1 init_27_arg_1 = var_7; [L95] state_26 = init_27_arg_1 [L96] SORT_1 init_29_arg_1 = var_7; [L97] state_28 = init_29_arg_1 [L98] SORT_1 init_42_arg_1 = var_7; [L99] state_41 = init_42_arg_1 [L100] SORT_1 init_44_arg_1 = var_7; [L101] state_43 = init_44_arg_1 [L102] SORT_1 init_52_arg_1 = var_22; [L103] state_51 = init_52_arg_1 [L104] SORT_1 init_59_arg_1 = var_7; [L105] state_58 = init_59_arg_1 [L106] SORT_1 init_61_arg_1 = var_7; [L107] state_60 = init_61_arg_1 [L108] SORT_1 init_63_arg_1 = var_7; [L109] state_62 = init_63_arg_1 [L110] SORT_1 init_65_arg_1 = var_7; [L111] state_64 = init_65_arg_1 [L112] SORT_68 init_71_arg_1 = var_69; [L113] state_70 = init_71_arg_1 [L114] SORT_1 init_73_arg_1 = var_7; [L115] state_72 = init_73_arg_1 VAL [init_16_arg_1=0, init_27_arg_1=0, init_29_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_52_arg_1=1, init_59_arg_1=0, init_61_arg_1=0, init_63_arg_1=0, init_65_arg_1=0, init_71_arg_1=0, init_73_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_10=4294967295, mask_SORT_3=255, mask_SORT_32=15, mask_SORT_68=1023, msb_SORT_1=1, msb_SORT_10=2147483648, msb_SORT_3=128, msb_SORT_32=8, msb_SORT_68=512, state_15=0, state_26=0, state_28=0, state_41=0, state_43=0, state_51=1, state_58=0, state_60=0, state_62=0, state_64=0, state_70=0, state_72=0, state_8=0, var_119=104, var_12=1, var_22=1, var_69=0, var_7=0] [L118] input_2 = __VERIFIER_nondet_uchar() [L119] input_4 = __VERIFIER_nondet_uchar() [L120] input_5 = __VERIFIER_nondet_uchar() [L121] input_6 = __VERIFIER_nondet_uchar() [L122] input_30 = __VERIFIER_nondet_uchar() [L123] input_33 = __VERIFIER_nondet_uchar() [L124] input_35 = __VERIFIER_nondet_uchar() [L125] input_37 = __VERIFIER_nondet_uchar() [L126] input_39 = __VERIFIER_nondet_uchar() [L127] input_45 = __VERIFIER_nondet_uchar() [L128] input_47 = __VERIFIER_nondet_uchar() [L129] input_49 = __VERIFIER_nondet_uchar() [L130] input_53 = __VERIFIER_nondet_uchar() [L131] input_56 = __VERIFIER_nondet_uchar() [L132] input_66 = __VERIFIER_nondet_uchar() [L133] input_75 = __VERIFIER_nondet_uchar() [L134] input_81 = __VERIFIER_nondet_uchar() [L135] input_85 = __VERIFIER_nondet_uchar() [L136] input_95 = __VERIFIER_nondet_uchar() [L137] input_101 = __VERIFIER_nondet_uchar() [L138] input_107 = __VERIFIER_nondet_uchar() [L139] input_113 = __VERIFIER_nondet_uchar() [L140] input_114 = __VERIFIER_nondet_uchar() [L141] input_115 = __VERIFIER_nondet_uchar() [L142] input_132 = __VERIFIER_nondet_uchar() [L143] input_139 = __VERIFIER_nondet_ushort() [L144] input_147 = __VERIFIER_nondet_uchar() [L145] input_148 = __VERIFIER_nondet_uchar() [L146] input_149 = __VERIFIER_nondet_uchar() [L149] SORT_1 var_11_arg_0 = state_8; [L150] var_11_arg_0 = var_11_arg_0 & mask_SORT_1 [L151] SORT_10 var_11 = var_11_arg_0; [L152] SORT_10 var_13_arg_0 = var_11; [L153] SORT_10 var_13_arg_1 = var_12; [L154] SORT_1 var_13 = var_13_arg_0 == var_13_arg_1; [L155] SORT_1 var_14_arg_0 = var_13; [L156] SORT_1 var_14 = ~var_14_arg_0; [L157] SORT_1 var_17_arg_0 = state_15; [L158] var_17_arg_0 = var_17_arg_0 & mask_SORT_1 [L159] SORT_10 var_17 = var_17_arg_0; [L160] SORT_10 var_18_arg_0 = var_17; [L161] SORT_10 var_18_arg_1 = var_12; [L162] SORT_1 var_18 = var_18_arg_0 == var_18_arg_1; [L163] SORT_1 var_19_arg_0 = var_14; [L164] SORT_1 var_19_arg_1 = var_18; [L165] SORT_1 var_19 = var_19_arg_0 | var_19_arg_1; [L166] SORT_1 var_23_arg_0 = var_19; [L167] SORT_1 var_23 = ~var_23_arg_0; [L168] SORT_1 var_24_arg_0 = var_22; [L169] SORT_1 var_24_arg_1 = var_23; [L170] SORT_1 var_24 = var_24_arg_0 & var_24_arg_1; [L171] var_24 = var_24 & mask_SORT_1 [L172] SORT_1 bad_25_arg_0 = var_24; [L173] CALL __VERIFIER_assert(!(bad_25_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 95 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-02 20:23:16,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc --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 64bit --witnessprinter.graph.data.programhash 71db3ddd8c41e0e55165084822cc484764b1b1fea6b2ce41ef188424a7fe2ced --- 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-5e519f3 [2022-11-02 20:23:19,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:23:19,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:23:19,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:23:19,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:23:19,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:23:19,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:23:19,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:23:19,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:23:19,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:23:19,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:23:19,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:23:19,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:23:19,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:23:19,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:23:19,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:23:19,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:23:19,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:23:19,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:23:19,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:23:19,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:23:19,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:23:19,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:23:19,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:23:19,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:23:19,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:23:19,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:23:19,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:23:19,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:23:19,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:23:19,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:23:19,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:23:19,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:23:19,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:23:19,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:23:19,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:23:19,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:23:19,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:23:19,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:23:19,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:23:19,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:23:19,404 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-11-02 20:23:19,438 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:23:19,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:23:19,439 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:23:19,439 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:23:19,440 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:23:19,440 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:23:19,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:23:19,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:23:19,441 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:23:19,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:23:19,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:23:19,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:23:19,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:23:19,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:23:19,443 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:23:19,443 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-02 20:23:19,443 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-02 20:23:19,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:23:19,444 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:23:19,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:23:19,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:23:19,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:23:19,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:23:19,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:23:19,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:23:19,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:23:19,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:23:19,446 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-02 20:23:19,446 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-02 20:23:19,446 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:23:19,446 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:23:19,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:23:19,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-02 20:23:19,447 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71db3ddd8c41e0e55165084822cc484764b1b1fea6b2ce41ef188424a7fe2ced [2022-11-02 20:23:19,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:23:19,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:23:19,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:23:19,939 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:23:19,940 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:23:19,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c [2022-11-02 20:23:20,036 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/data/e9772be22/1a0168e7f7144b46b6ff91f14f1f6938/FLAG179809de7 [2022-11-02 20:23:20,792 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:23:20,792 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c [2022-11-02 20:23:20,812 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/data/e9772be22/1a0168e7f7144b46b6ff91f14f1f6938/FLAG179809de7 [2022-11-02 20:23:21,079 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/data/e9772be22/1a0168e7f7144b46b6ff91f14f1f6938 [2022-11-02 20:23:21,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:23:21,086 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:23:21,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:23:21,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:23:21,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:23:21,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:23:21" (1/1) ... [2022-11-02 20:23:21,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c25b5b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:21, skipping insertion in model container [2022-11-02 20:23:21,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:23:21" (1/1) ... [2022-11-02 20:23:21,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:23:21,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:23:21,381 WARN L230 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_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c[1107,1120] [2022-11-02 20:23:21,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:23:21,577 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:23:21,589 WARN L230 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_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c[1107,1120] [2022-11-02 20:23:21,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:23:21,675 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:23:21,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:21 WrapperNode [2022-11-02 20:23:21,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:23:21,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:23:21,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:23:21,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:23:21,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:21" (1/1) ... [2022-11-02 20:23:21,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:21" (1/1) ... [2022-11-02 20:23:21,772 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 604 [2022-11-02 20:23:21,772 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:23:21,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:23:21,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:23:21,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:23:21,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:21" (1/1) ... [2022-11-02 20:23:21,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:21" (1/1) ... [2022-11-02 20:23:21,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:21" (1/1) ... [2022-11-02 20:23:21,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:21" (1/1) ... [2022-11-02 20:23:21,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:21" (1/1) ... [2022-11-02 20:23:21,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:21" (1/1) ... [2022-11-02 20:23:21,816 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:21" (1/1) ... [2022-11-02 20:23:21,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:21" (1/1) ... [2022-11-02 20:23:21,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:23:21,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:23:21,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:23:21,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:23:21,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:21" (1/1) ... [2022-11-02 20:23:21,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:23:21,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:23:21,913 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:23:21,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:23:21,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:23:21,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:23:22,171 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:23:22,173 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:23:22,998 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:23:23,009 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:23:23,010 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:23:23,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:23:23 BoogieIcfgContainer [2022-11-02 20:23:23,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:23:23,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:23:23,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:23:23,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:23:23,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:23:21" (1/3) ... [2022-11-02 20:23:23,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269a8a6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:23:23, skipping insertion in model container [2022-11-02 20:23:23,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:23:21" (2/3) ... [2022-11-02 20:23:23,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269a8a6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:23:23, skipping insertion in model container [2022-11-02 20:23:23,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:23:23" (3/3) ... [2022-11-02 20:23:23,026 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p06.c [2022-11-02 20:23:23,047 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:23:23,048 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:23:23,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:23:23,132 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;@5da67a43, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:23:23,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:23:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 93 states have (on average 1.4946236559139785) internal successors, (139), 94 states have internal predecessors, (139), 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) [2022-11-02 20:23:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-02 20:23:23,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:23,145 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-02 20:23:23,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:23,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:23,151 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-02 20:23:23,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:23,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763058036] [2022-11-02 20:23:23,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:23,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:23,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:23,172 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:23,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-02 20:23:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:23,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:23:23,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:23,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:23,671 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:23,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763058036] [2022-11-02 20:23:23,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763058036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:23,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:23,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:23,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482404394] [2022-11-02 20:23:23,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:23,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:23,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:23,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:23,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:23,726 INFO L87 Difference]: Start difference. First operand has 95 states, 93 states have (on average 1.4946236559139785) internal successors, (139), 94 states have internal predecessors, (139), 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 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2022-11-02 20:23:23,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:23,894 INFO L93 Difference]: Finished difference Result 272 states and 408 transitions. [2022-11-02 20:23:23,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:23,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2022-11-02 20:23:23,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:23,907 INFO L225 Difference]: With dead ends: 272 [2022-11-02 20:23:23,911 INFO L226 Difference]: Without dead ends: 179 [2022-11-02 20:23:23,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:23,918 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 255 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:23,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 367 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:23:23,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-02 20:23:23,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 93. [2022-11-02 20:23:23,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 92 states have internal predecessors, (135), 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) [2022-11-02 20:23:23,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 135 transitions. [2022-11-02 20:23:23,961 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 135 transitions. Word has length 5 [2022-11-02 20:23:23,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:23,962 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 135 transitions. [2022-11-02 20:23:23,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2022-11-02 20:23:23,962 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 135 transitions. [2022-11-02 20:23:23,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:23,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:23,965 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:23,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:24,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:24,167 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:24,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:24,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1914847655, now seen corresponding path program 1 times [2022-11-02 20:23:24,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:24,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26217925] [2022-11-02 20:23:24,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:24,173 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:24,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:24,174 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:24,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-02 20:23:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:24,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:24,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:24,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:24,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:24,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26217925] [2022-11-02 20:23:24,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26217925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:24,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:24,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:24,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501702141] [2022-11-02 20:23:24,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:24,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:24,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:24,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:24,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:24,572 INFO L87 Difference]: Start difference. First operand 93 states and 135 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:24,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:24,638 INFO L93 Difference]: Finished difference Result 355 states and 522 transitions. [2022-11-02 20:23:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:24,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:24,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:24,641 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:24,642 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:24,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:24,644 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 378 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:24,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 513 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:24,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:24,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 95. [2022-11-02 20:23:24,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.4574468085106382) internal successors, (137), 94 states have internal predecessors, (137), 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) [2022-11-02 20:23:24,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 137 transitions. [2022-11-02 20:23:24,658 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 137 transitions. Word has length 92 [2022-11-02 20:23:24,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:24,659 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 137 transitions. [2022-11-02 20:23:24,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:24,659 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 137 transitions. [2022-11-02 20:23:24,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:24,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:24,662 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:24,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:24,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:24,885 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:24,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1328571433, now seen corresponding path program 1 times [2022-11-02 20:23:24,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:24,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935919519] [2022-11-02 20:23:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:24,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:24,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:24,889 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:24,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-02 20:23:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:25,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:23:25,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:25,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:25,364 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:25,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935919519] [2022-11-02 20:23:25,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935919519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:25,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:25,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:23:25,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633626510] [2022-11-02 20:23:25,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:25,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:23:25,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:25,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:23:25,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:23:25,374 INFO L87 Difference]: Start difference. First operand 95 states and 137 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 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) [2022-11-02 20:23:25,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:25,636 INFO L93 Difference]: Finished difference Result 274 states and 400 transitions. [2022-11-02 20:23:25,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:23:25,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:25,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:25,638 INFO L225 Difference]: With dead ends: 274 [2022-11-02 20:23:25,638 INFO L226 Difference]: Without dead ends: 185 [2022-11-02 20:23:25,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:23:25,640 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 377 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:25,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 599 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:23:25,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-02 20:23:25,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 97. [2022-11-02 20:23:25,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.4479166666666667) internal successors, (139), 96 states have internal predecessors, (139), 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) [2022-11-02 20:23:25,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2022-11-02 20:23:25,662 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 92 [2022-11-02 20:23:25,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:25,663 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2022-11-02 20:23:25,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 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) [2022-11-02 20:23:25,663 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2022-11-02 20:23:25,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:25,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:25,665 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:25,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:25,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:25,883 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:25,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:25,884 INFO L85 PathProgramCache]: Analyzing trace with hash -547911385, now seen corresponding path program 1 times [2022-11-02 20:23:25,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:25,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884104422] [2022-11-02 20:23:25,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:25,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:25,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:25,887 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:25,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-02 20:23:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:26,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:26,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:26,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:26,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:26,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884104422] [2022-11-02 20:23:26,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884104422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:26,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:26,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:26,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538301876] [2022-11-02 20:23:26,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:26,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:26,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:26,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:26,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:26,273 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:26,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:26,326 INFO L93 Difference]: Finished difference Result 355 states and 520 transitions. [2022-11-02 20:23:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:26,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:26,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:26,329 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:26,329 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:26,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:26,340 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 366 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:26,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 502 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:26,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:26,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 99. [2022-11-02 20:23:26,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.4387755102040816) internal successors, (141), 98 states have internal predecessors, (141), 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) [2022-11-02 20:23:26,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 141 transitions. [2022-11-02 20:23:26,366 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 141 transitions. Word has length 92 [2022-11-02 20:23:26,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:26,368 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 141 transitions. [2022-11-02 20:23:26,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:26,369 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 141 transitions. [2022-11-02 20:23:26,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:26,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:26,372 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:26,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:26,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:26,588 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:26,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:26,589 INFO L85 PathProgramCache]: Analyzing trace with hash 776944809, now seen corresponding path program 1 times [2022-11-02 20:23:26,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:26,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875653834] [2022-11-02 20:23:26,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:26,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:26,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:26,591 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:26,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-02 20:23:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:26,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:26,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:27,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:27,032 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:27,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875653834] [2022-11-02 20:23:27,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875653834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:27,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:27,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:27,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322994499] [2022-11-02 20:23:27,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:27,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:27,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:27,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:27,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:27,036 INFO L87 Difference]: Start difference. First operand 99 states and 141 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:27,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:27,086 INFO L93 Difference]: Finished difference Result 355 states and 519 transitions. [2022-11-02 20:23:27,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:27,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:27,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:27,089 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:27,089 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:27,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:27,091 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 360 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:27,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 501 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:27,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:27,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 101. [2022-11-02 20:23:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.43) internal successors, (143), 100 states have internal predecessors, (143), 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) [2022-11-02 20:23:27,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 143 transitions. [2022-11-02 20:23:27,114 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 143 transitions. Word has length 92 [2022-11-02 20:23:27,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:27,114 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 143 transitions. [2022-11-02 20:23:27,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:27,115 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 143 transitions. [2022-11-02 20:23:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:27,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:27,124 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:27,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:27,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:27,340 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:27,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:27,340 INFO L85 PathProgramCache]: Analyzing trace with hash -280893269, now seen corresponding path program 1 times [2022-11-02 20:23:27,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:27,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478859724] [2022-11-02 20:23:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:27,341 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:27,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:27,344 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:27,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-02 20:23:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:27,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:27,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:27,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:27,657 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:27,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478859724] [2022-11-02 20:23:27,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478859724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:27,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:27,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:27,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359448032] [2022-11-02 20:23:27,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:27,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:27,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:27,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:27,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:27,675 INFO L87 Difference]: Start difference. First operand 101 states and 143 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:27,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:27,720 INFO L93 Difference]: Finished difference Result 355 states and 518 transitions. [2022-11-02 20:23:27,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:27,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:27,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:27,722 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:27,723 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:27,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:27,724 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 349 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:27,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 500 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:27,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:27,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 105. [2022-11-02 20:23:27,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.4230769230769231) internal successors, (148), 104 states have internal predecessors, (148), 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) [2022-11-02 20:23:27,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 148 transitions. [2022-11-02 20:23:27,731 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 148 transitions. Word has length 92 [2022-11-02 20:23:27,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:27,732 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 148 transitions. [2022-11-02 20:23:27,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 148 transitions. [2022-11-02 20:23:27,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:27,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:27,734 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:27,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:27,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:27,954 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:27,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:27,955 INFO L85 PathProgramCache]: Analyzing trace with hash -253827667, now seen corresponding path program 1 times [2022-11-02 20:23:27,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:27,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595971394] [2022-11-02 20:23:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:27,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:27,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:27,958 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:27,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-02 20:23:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:28,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:28,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:28,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:28,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:28,288 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:28,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595971394] [2022-11-02 20:23:28,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595971394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:28,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:28,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:28,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453809218] [2022-11-02 20:23:28,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:28,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:28,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:28,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:28,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:28,291 INFO L87 Difference]: Start difference. First operand 105 states and 148 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:28,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:28,341 INFO L93 Difference]: Finished difference Result 355 states and 517 transitions. [2022-11-02 20:23:28,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:28,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:28,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:28,343 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:28,343 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:28,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:28,345 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 338 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:28,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 499 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:28,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:28,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 109. [2022-11-02 20:23:28,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.4166666666666667) internal successors, (153), 108 states have internal predecessors, (153), 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) [2022-11-02 20:23:28,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 153 transitions. [2022-11-02 20:23:28,352 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 153 transitions. Word has length 92 [2022-11-02 20:23:28,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:28,353 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 153 transitions. [2022-11-02 20:23:28,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:28,353 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 153 transitions. [2022-11-02 20:23:28,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:28,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:28,355 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:28,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:28,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:28,577 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:28,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:28,578 INFO L85 PathProgramCache]: Analyzing trace with hash 2130097071, now seen corresponding path program 1 times [2022-11-02 20:23:28,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:28,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276565089] [2022-11-02 20:23:28,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:28,579 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:28,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:28,580 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:28,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-02 20:23:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:28,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:28,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:28,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:28,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:28,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276565089] [2022-11-02 20:23:28,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276565089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:28,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:28,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:28,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177413805] [2022-11-02 20:23:28,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:28,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:28,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:28,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:28,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:28,909 INFO L87 Difference]: Start difference. First operand 109 states and 153 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:28,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:28,956 INFO L93 Difference]: Finished difference Result 355 states and 516 transitions. [2022-11-02 20:23:28,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:28,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:28,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:28,958 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:28,958 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:28,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:28,960 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 327 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:28,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 498 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:28,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:28,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 113. [2022-11-02 20:23:28,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.4107142857142858) internal successors, (158), 112 states have internal predecessors, (158), 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) [2022-11-02 20:23:28,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 158 transitions. [2022-11-02 20:23:28,966 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 158 transitions. Word has length 92 [2022-11-02 20:23:28,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:28,966 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 158 transitions. [2022-11-02 20:23:28,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 158 transitions. [2022-11-02 20:23:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:28,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:28,968 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:28,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:29,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:29,184 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:29,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:29,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1637470897, now seen corresponding path program 1 times [2022-11-02 20:23:29,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:29,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370819700] [2022-11-02 20:23:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:29,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:29,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:29,186 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:29,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-02 20:23:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:29,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:29,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:29,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:29,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:29,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370819700] [2022-11-02 20:23:29,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370819700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:29,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:29,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:29,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973268667] [2022-11-02 20:23:29,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:29,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:29,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:29,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:29,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:29,524 INFO L87 Difference]: Start difference. First operand 113 states and 158 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:29,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:29,556 INFO L93 Difference]: Finished difference Result 355 states and 515 transitions. [2022-11-02 20:23:29,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:29,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:29,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:29,559 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:29,559 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:29,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:29,562 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 321 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:29,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 506 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:29,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:29,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 115. [2022-11-02 20:23:29,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.4035087719298245) internal successors, (160), 114 states have internal predecessors, (160), 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) [2022-11-02 20:23:29,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 160 transitions. [2022-11-02 20:23:29,569 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 160 transitions. Word has length 92 [2022-11-02 20:23:29,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:29,570 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 160 transitions. [2022-11-02 20:23:29,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:29,570 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 160 transitions. [2022-11-02 20:23:29,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:29,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:29,573 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:29,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:29,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:29,788 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:29,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:29,789 INFO L85 PathProgramCache]: Analyzing trace with hash 421317171, now seen corresponding path program 1 times [2022-11-02 20:23:29,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:29,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793857611] [2022-11-02 20:23:29,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:29,790 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:29,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:29,791 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:29,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-02 20:23:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:30,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:30,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:30,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:30,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:30,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793857611] [2022-11-02 20:23:30,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793857611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:30,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:30,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:30,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651639316] [2022-11-02 20:23:30,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:30,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:30,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:30,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:30,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:30,102 INFO L87 Difference]: Start difference. First operand 115 states and 160 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:30,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:30,136 INFO L93 Difference]: Finished difference Result 355 states and 514 transitions. [2022-11-02 20:23:30,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:30,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:30,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:30,138 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:30,138 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:30,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:30,140 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 315 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:30,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 505 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:30,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:30,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 117. [2022-11-02 20:23:30,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.396551724137931) internal successors, (162), 116 states have internal predecessors, (162), 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) [2022-11-02 20:23:30,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 162 transitions. [2022-11-02 20:23:30,146 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 162 transitions. Word has length 92 [2022-11-02 20:23:30,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:30,146 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 162 transitions. [2022-11-02 20:23:30,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 162 transitions. [2022-11-02 20:23:30,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:30,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:30,148 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:30,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:30,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:30,359 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:30,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:30,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1264862667, now seen corresponding path program 1 times [2022-11-02 20:23:30,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:30,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153024803] [2022-11-02 20:23:30,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:30,360 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:30,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:30,361 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:30,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-02 20:23:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:30,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:30,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:30,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:30,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:30,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153024803] [2022-11-02 20:23:30,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153024803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:30,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:30,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:30,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140887707] [2022-11-02 20:23:30,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:30,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:30,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:30,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:30,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:30,701 INFO L87 Difference]: Start difference. First operand 117 states and 162 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:30,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:30,738 INFO L93 Difference]: Finished difference Result 355 states and 513 transitions. [2022-11-02 20:23:30,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:30,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:30,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:30,740 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:30,741 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:30,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:30,742 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 304 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:30,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 501 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:30,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:30,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 121. [2022-11-02 20:23:30,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.3916666666666666) internal successors, (167), 120 states have internal predecessors, (167), 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) [2022-11-02 20:23:30,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 167 transitions. [2022-11-02 20:23:30,747 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 167 transitions. Word has length 92 [2022-11-02 20:23:30,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:30,748 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 167 transitions. [2022-11-02 20:23:30,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:30,748 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 167 transitions. [2022-11-02 20:23:30,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:30,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:30,749 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:30,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:30,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:30,972 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:30,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:30,973 INFO L85 PathProgramCache]: Analyzing trace with hash 696711991, now seen corresponding path program 1 times [2022-11-02 20:23:30,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:30,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338701609] [2022-11-02 20:23:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:30,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:30,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:30,975 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:30,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-02 20:23:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:31,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:31,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:31,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:31,289 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:31,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338701609] [2022-11-02 20:23:31,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338701609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:31,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:31,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:31,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208984613] [2022-11-02 20:23:31,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:31,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:31,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:31,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:31,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:31,291 INFO L87 Difference]: Start difference. First operand 121 states and 167 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:31,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:31,331 INFO L93 Difference]: Finished difference Result 355 states and 512 transitions. [2022-11-02 20:23:31,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:31,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:31,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:31,333 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:31,333 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:31,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:31,334 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 298 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:31,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 500 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:31,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:31,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 123. [2022-11-02 20:23:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.3852459016393444) internal successors, (169), 122 states have internal predecessors, (169), 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) [2022-11-02 20:23:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 169 transitions. [2022-11-02 20:23:31,340 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 169 transitions. Word has length 92 [2022-11-02 20:23:31,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:31,340 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 169 transitions. [2022-11-02 20:23:31,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:31,340 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 169 transitions. [2022-11-02 20:23:31,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:31,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:31,342 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:31,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:31,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:31,547 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:31,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:31,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1257411769, now seen corresponding path program 1 times [2022-11-02 20:23:31,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:31,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961934930] [2022-11-02 20:23:31,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:31,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:31,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:31,554 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:31,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-02 20:23:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:31,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:31,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:31,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:31,896 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:31,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961934930] [2022-11-02 20:23:31,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961934930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:31,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:31,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:31,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413109909] [2022-11-02 20:23:31,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:31,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:31,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:31,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:31,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:31,899 INFO L87 Difference]: Start difference. First operand 123 states and 169 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:31,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:31,948 INFO L93 Difference]: Finished difference Result 355 states and 511 transitions. [2022-11-02 20:23:31,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:31,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:31,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:31,950 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:31,950 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:31,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:31,951 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 287 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:31,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 493 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:31,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 127. [2022-11-02 20:23:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.380952380952381) internal successors, (174), 126 states have internal predecessors, (174), 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) [2022-11-02 20:23:31,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 174 transitions. [2022-11-02 20:23:31,957 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 174 transitions. Word has length 92 [2022-11-02 20:23:31,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:31,958 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 174 transitions. [2022-11-02 20:23:31,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:31,958 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 174 transitions. [2022-11-02 20:23:31,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:31,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:31,959 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:31,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:32,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:32,174 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:32,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:32,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1650770117, now seen corresponding path program 1 times [2022-11-02 20:23:32,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:32,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029345665] [2022-11-02 20:23:32,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:32,175 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:32,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:32,176 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:32,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-02 20:23:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:32,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:32,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:32,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:32,526 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:32,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029345665] [2022-11-02 20:23:32,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1029345665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:32,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:32,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:32,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495478011] [2022-11-02 20:23:32,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:32,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:32,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:32,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:32,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:32,528 INFO L87 Difference]: Start difference. First operand 127 states and 174 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:32,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:32,573 INFO L93 Difference]: Finished difference Result 355 states and 510 transitions. [2022-11-02 20:23:32,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:32,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:32,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:32,575 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:32,575 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:32,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:32,576 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 271 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:32,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 492 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:32,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:32,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 133. [2022-11-02 20:23:32,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.378787878787879) internal successors, (182), 132 states have internal predecessors, (182), 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) [2022-11-02 20:23:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 182 transitions. [2022-11-02 20:23:32,581 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 182 transitions. Word has length 92 [2022-11-02 20:23:32,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:32,582 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 182 transitions. [2022-11-02 20:23:32,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 182 transitions. [2022-11-02 20:23:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:32,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:32,583 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:32,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:32,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:32,807 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:32,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:32,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1666288835, now seen corresponding path program 1 times [2022-11-02 20:23:32,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:32,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871686445] [2022-11-02 20:23:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:32,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:32,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:32,809 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:32,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-02 20:23:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:33,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:23:33,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:33,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:33,276 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:33,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871686445] [2022-11-02 20:23:33,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871686445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:33,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:33,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:33,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106172425] [2022-11-02 20:23:33,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:33,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:33,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:33,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:33,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:33,279 INFO L87 Difference]: Start difference. First operand 133 states and 182 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:33,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:33,395 INFO L93 Difference]: Finished difference Result 355 states and 509 transitions. [2022-11-02 20:23:33,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:33,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:33,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:33,398 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:33,398 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:33,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:33,399 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 265 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:33,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 458 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:23:33,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:33,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 135. [2022-11-02 20:23:33,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.373134328358209) internal successors, (184), 134 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 184 transitions. [2022-11-02 20:23:33,405 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 184 transitions. Word has length 92 [2022-11-02 20:23:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:33,405 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 184 transitions. [2022-11-02 20:23:33,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:33,405 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 184 transitions. [2022-11-02 20:23:33,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:33,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:33,406 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:33,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:33,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:33,620 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:33,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:33,621 INFO L85 PathProgramCache]: Analyzing trace with hash -2019377217, now seen corresponding path program 1 times [2022-11-02 20:23:33,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:33,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227653328] [2022-11-02 20:23:33,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:33,622 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:33,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:33,623 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:33,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-02 20:23:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:33,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:23:33,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:34,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:34,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:34,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227653328] [2022-11-02 20:23:34,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227653328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:34,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:34,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:23:34,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57194572] [2022-11-02 20:23:34,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:34,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:23:34,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:23:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:34,233 INFO L87 Difference]: Start difference. First operand 135 states and 184 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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) [2022-11-02 20:23:34,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:34,335 INFO L93 Difference]: Finished difference Result 400 states and 573 transitions. [2022-11-02 20:23:34,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:23:34,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:34,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:34,337 INFO L225 Difference]: With dead ends: 400 [2022-11-02 20:23:34,337 INFO L226 Difference]: Without dead ends: 311 [2022-11-02 20:23:34,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:23:34,338 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 453 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:34,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 738 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:23:34,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-02 20:23:34,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 137. [2022-11-02 20:23:34,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.3676470588235294) internal successors, (186), 136 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:34,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 186 transitions. [2022-11-02 20:23:34,344 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 186 transitions. Word has length 92 [2022-11-02 20:23:34,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:34,345 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 186 transitions. [2022-11-02 20:23:34,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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) [2022-11-02 20:23:34,345 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 186 transitions. [2022-11-02 20:23:34,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:34,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:34,346 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:34,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:34,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:34,561 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:34,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:34,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1125890879, now seen corresponding path program 1 times [2022-11-02 20:23:34,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:34,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13403136] [2022-11-02 20:23:34,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:34,563 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:34,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:34,564 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:34,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-02 20:23:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:34,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:34,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:34,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:34,866 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:34,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13403136] [2022-11-02 20:23:34,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13403136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:34,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:34,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:34,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069013020] [2022-11-02 20:23:34,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:34,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:34,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:34,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:34,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:34,868 INFO L87 Difference]: Start difference. First operand 137 states and 186 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:34,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:34,923 INFO L93 Difference]: Finished difference Result 355 states and 507 transitions. [2022-11-02 20:23:34,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:34,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:34,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:34,925 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:34,925 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:34,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:34,926 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 253 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:34,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 477 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:34,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:34,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 139. [2022-11-02 20:23:34,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.3623188405797102) internal successors, (188), 138 states have internal predecessors, (188), 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) [2022-11-02 20:23:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 188 transitions. [2022-11-02 20:23:34,931 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 188 transitions. Word has length 92 [2022-11-02 20:23:34,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:34,932 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 188 transitions. [2022-11-02 20:23:34,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 188 transitions. [2022-11-02 20:23:34,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:34,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:34,933 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:34,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:35,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:35,147 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:35,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:35,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2023284157, now seen corresponding path program 1 times [2022-11-02 20:23:35,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:35,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029891636] [2022-11-02 20:23:35,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:35,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:35,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:35,149 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:35,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-02 20:23:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:35,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:23:35,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:35,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:35,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:35,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029891636] [2022-11-02 20:23:35,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029891636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:35,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:35,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:23:35,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769146854] [2022-11-02 20:23:35,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:35,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:23:35,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:35,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:23:35,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:35,808 INFO L87 Difference]: Start difference. First operand 139 states and 188 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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) [2022-11-02 20:23:35,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:35,921 INFO L93 Difference]: Finished difference Result 400 states and 571 transitions. [2022-11-02 20:23:35,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:23:35,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:35,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:35,923 INFO L225 Difference]: With dead ends: 400 [2022-11-02 20:23:35,924 INFO L226 Difference]: Without dead ends: 311 [2022-11-02 20:23:35,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:23:35,925 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 439 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:35,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 730 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:23:35,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-02 20:23:35,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 141. [2022-11-02 20:23:35,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.3571428571428572) internal successors, (190), 140 states have internal predecessors, (190), 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) [2022-11-02 20:23:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 190 transitions. [2022-11-02 20:23:35,931 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 190 transitions. Word has length 92 [2022-11-02 20:23:35,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:35,931 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 190 transitions. [2022-11-02 20:23:35,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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) [2022-11-02 20:23:35,932 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 190 transitions. [2022-11-02 20:23:35,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:35,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:35,933 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:35,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:36,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:36,147 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:36,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:36,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1599637435, now seen corresponding path program 1 times [2022-11-02 20:23:36,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:36,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432958054] [2022-11-02 20:23:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:36,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:36,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:36,150 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:36,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-02 20:23:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:36,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:36,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:36,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:36,490 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:36,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432958054] [2022-11-02 20:23:36,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1432958054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:36,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:36,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:36,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480203666] [2022-11-02 20:23:36,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:36,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:36,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:36,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:36,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:36,494 INFO L87 Difference]: Start difference. First operand 141 states and 190 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:36,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:36,551 INFO L93 Difference]: Finished difference Result 355 states and 505 transitions. [2022-11-02 20:23:36,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:36,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:36,553 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:36,554 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:36,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:36,555 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 236 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:36,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 475 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:36,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 145. [2022-11-02 20:23:36,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.3541666666666667) internal successors, (195), 144 states have internal predecessors, (195), 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) [2022-11-02 20:23:36,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 195 transitions. [2022-11-02 20:23:36,560 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 195 transitions. Word has length 92 [2022-11-02 20:23:36,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:36,561 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 195 transitions. [2022-11-02 20:23:36,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:36,561 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 195 transitions. [2022-11-02 20:23:36,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:36,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:36,562 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:36,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:36,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:36,775 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:36,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:36,776 INFO L85 PathProgramCache]: Analyzing trace with hash -940105913, now seen corresponding path program 1 times [2022-11-02 20:23:36,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:36,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761129578] [2022-11-02 20:23:36,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:36,777 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:36,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:36,778 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:36,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-02 20:23:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:37,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:37,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:37,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:37,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:37,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761129578] [2022-11-02 20:23:37,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761129578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:37,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:37,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:37,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077304635] [2022-11-02 20:23:37,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:37,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:37,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:37,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:37,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:37,137 INFO L87 Difference]: Start difference. First operand 145 states and 195 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:37,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:37,181 INFO L93 Difference]: Finished difference Result 355 states and 504 transitions. [2022-11-02 20:23:37,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:37,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:37,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:37,183 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:37,183 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:37,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:37,184 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 230 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:37,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 486 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:37,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:37,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 147. [2022-11-02 20:23:37,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.3493150684931507) internal successors, (197), 146 states have internal predecessors, (197), 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) [2022-11-02 20:23:37,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 197 transitions. [2022-11-02 20:23:37,195 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 197 transitions. Word has length 92 [2022-11-02 20:23:37,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:37,196 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 197 transitions. [2022-11-02 20:23:37,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:37,196 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 197 transitions. [2022-11-02 20:23:37,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:37,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:37,197 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:37,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:37,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:37,411 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:37,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:37,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1784111415, now seen corresponding path program 1 times [2022-11-02 20:23:37,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:37,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970714290] [2022-11-02 20:23:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:37,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:37,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:37,414 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:37,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-02 20:23:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:37,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:37,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:37,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:37,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:37,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:37,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970714290] [2022-11-02 20:23:37,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970714290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:37,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:37,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:37,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105867749] [2022-11-02 20:23:37,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:37,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:37,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:37,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:37,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:37,760 INFO L87 Difference]: Start difference. First operand 147 states and 197 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:37,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:37,791 INFO L93 Difference]: Finished difference Result 355 states and 503 transitions. [2022-11-02 20:23:37,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:37,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:37,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:37,794 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:37,794 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:37,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:37,795 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 224 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:37,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 494 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:37,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:37,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 149. [2022-11-02 20:23:37,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.3445945945945945) internal successors, (199), 148 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:37,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 199 transitions. [2022-11-02 20:23:37,804 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 199 transitions. Word has length 92 [2022-11-02 20:23:37,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:37,804 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 199 transitions. [2022-11-02 20:23:37,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:37,805 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 199 transitions. [2022-11-02 20:23:37,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:37,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:37,806 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:37,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:38,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:38,019 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:38,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:38,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1856497973, now seen corresponding path program 1 times [2022-11-02 20:23:38,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:38,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101001094] [2022-11-02 20:23:38,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:38,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:38,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:38,021 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:38,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-02 20:23:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:38,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:38,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:38,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:38,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:38,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101001094] [2022-11-02 20:23:38,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101001094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:38,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:38,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:38,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159069379] [2022-11-02 20:23:38,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:38,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:38,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:38,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:38,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:38,369 INFO L87 Difference]: Start difference. First operand 149 states and 199 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:38,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:38,398 INFO L93 Difference]: Finished difference Result 355 states and 502 transitions. [2022-11-02 20:23:38,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:38,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:38,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:38,400 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:38,400 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:38,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:38,402 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 218 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:38,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 493 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:38,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:38,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 151. [2022-11-02 20:23:38,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.34) internal successors, (201), 150 states have internal predecessors, (201), 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) [2022-11-02 20:23:38,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 201 transitions. [2022-11-02 20:23:38,408 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 201 transitions. Word has length 92 [2022-11-02 20:23:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:38,409 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 201 transitions. [2022-11-02 20:23:38,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:38,409 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 201 transitions. [2022-11-02 20:23:38,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:38,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:38,410 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:38,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:38,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:38,624 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:38,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:38,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1154898099, now seen corresponding path program 1 times [2022-11-02 20:23:38,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:38,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445822472] [2022-11-02 20:23:38,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:38,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:38,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:38,627 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:38,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-02 20:23:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:38,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:38,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:38,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:38,955 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:38,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445822472] [2022-11-02 20:23:38,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445822472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:38,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:38,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:38,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394306315] [2022-11-02 20:23:38,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:38,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:38,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:38,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:38,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:38,958 INFO L87 Difference]: Start difference. First operand 151 states and 201 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:39,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:39,003 INFO L93 Difference]: Finished difference Result 355 states and 501 transitions. [2022-11-02 20:23:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:39,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:39,005 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:39,005 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:39,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:39,006 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 207 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:39,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 483 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:39,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:39,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 155. [2022-11-02 20:23:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.3376623376623376) internal successors, (206), 154 states have internal predecessors, (206), 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) [2022-11-02 20:23:39,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 206 transitions. [2022-11-02 20:23:39,011 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 206 transitions. Word has length 92 [2022-11-02 20:23:39,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:39,012 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 206 transitions. [2022-11-02 20:23:39,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:39,012 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 206 transitions. [2022-11-02 20:23:39,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:39,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:39,013 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:39,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:39,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:39,226 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:39,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:39,227 INFO L85 PathProgramCache]: Analyzing trace with hash 768329935, now seen corresponding path program 1 times [2022-11-02 20:23:39,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:39,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947130045] [2022-11-02 20:23:39,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:39,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:39,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:39,228 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:39,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-02 20:23:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:39,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:39,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:39,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:39,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:39,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947130045] [2022-11-02 20:23:39,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947130045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:39,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:39,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:39,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961844402] [2022-11-02 20:23:39,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:39,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:39,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:39,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:39,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:39,545 INFO L87 Difference]: Start difference. First operand 155 states and 206 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:39,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:39,600 INFO L93 Difference]: Finished difference Result 355 states and 500 transitions. [2022-11-02 20:23:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:39,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:39,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:39,603 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:39,603 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:39,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:39,604 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 201 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:39,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 482 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:39,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 157. [2022-11-02 20:23:39,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.3333333333333333) internal successors, (208), 156 states have internal predecessors, (208), 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) [2022-11-02 20:23:39,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 208 transitions. [2022-11-02 20:23:39,612 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 208 transitions. Word has length 92 [2022-11-02 20:23:39,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:39,613 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 208 transitions. [2022-11-02 20:23:39,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:39,613 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 208 transitions. [2022-11-02 20:23:39,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:39,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:39,619 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:39,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:39,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:39,820 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:39,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:39,820 INFO L85 PathProgramCache]: Analyzing trace with hash 908878545, now seen corresponding path program 1 times [2022-11-02 20:23:39,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:39,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [367714905] [2022-11-02 20:23:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:39,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:39,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:39,822 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:39,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-02 20:23:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:40,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:40,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:40,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:40,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:40,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [367714905] [2022-11-02 20:23:40,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [367714905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:40,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:40,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:40,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854903193] [2022-11-02 20:23:40,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:40,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:40,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:40,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:40,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:40,155 INFO L87 Difference]: Start difference. First operand 157 states and 208 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:40,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:40,189 INFO L93 Difference]: Finished difference Result 355 states and 499 transitions. [2022-11-02 20:23:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:40,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:40,191 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:40,191 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:40,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:40,193 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 195 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:40,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 487 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:40,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:40,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 159. [2022-11-02 20:23:40,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.3291139240506329) internal successors, (210), 158 states have internal predecessors, (210), 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) [2022-11-02 20:23:40,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 210 transitions. [2022-11-02 20:23:40,210 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 210 transitions. Word has length 92 [2022-11-02 20:23:40,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:40,210 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 210 transitions. [2022-11-02 20:23:40,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:40,211 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 210 transitions. [2022-11-02 20:23:40,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:40,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:40,212 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:40,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:40,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:40,427 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:40,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:40,427 INFO L85 PathProgramCache]: Analyzing trace with hash -896559789, now seen corresponding path program 1 times [2022-11-02 20:23:40,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:40,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726381961] [2022-11-02 20:23:40,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:40,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:40,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:40,429 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:40,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-02 20:23:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:40,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:40,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:40,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:40,784 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:40,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726381961] [2022-11-02 20:23:40,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726381961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:40,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:40,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:40,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081535493] [2022-11-02 20:23:40,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:40,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:40,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:40,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:40,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:40,787 INFO L87 Difference]: Start difference. First operand 159 states and 210 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:40,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:40,840 INFO L93 Difference]: Finished difference Result 355 states and 498 transitions. [2022-11-02 20:23:40,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:40,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:40,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:40,841 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:40,842 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:40,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:40,843 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 184 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:40,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 468 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:40,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:40,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 163. [2022-11-02 20:23:40,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.3271604938271604) internal successors, (215), 162 states have internal predecessors, (215), 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) [2022-11-02 20:23:40,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 215 transitions. [2022-11-02 20:23:40,848 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 215 transitions. Word has length 92 [2022-11-02 20:23:40,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:40,848 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 215 transitions. [2022-11-02 20:23:40,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:40,849 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 215 transitions. [2022-11-02 20:23:40,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:40,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:40,850 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:40,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:41,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:41,063 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:41,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:41,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1709463765, now seen corresponding path program 1 times [2022-11-02 20:23:41,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:41,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446108050] [2022-11-02 20:23:41,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:41,066 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:41,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:41,067 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:41,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-02 20:23:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:41,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:41,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:41,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:41,468 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:41,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446108050] [2022-11-02 20:23:41,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446108050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:41,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:41,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:41,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582395001] [2022-11-02 20:23:41,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:41,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:41,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:41,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:41,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:41,470 INFO L87 Difference]: Start difference. First operand 163 states and 215 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:41,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:41,531 INFO L93 Difference]: Finished difference Result 355 states and 497 transitions. [2022-11-02 20:23:41,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:41,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:41,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:41,536 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:41,536 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:41,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:41,538 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 178 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:41,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 467 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:41,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:41,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 165. [2022-11-02 20:23:41,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.3231707317073171) internal successors, (217), 164 states have internal predecessors, (217), 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) [2022-11-02 20:23:41,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 217 transitions. [2022-11-02 20:23:41,547 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 217 transitions. Word has length 92 [2022-11-02 20:23:41,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:41,548 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 217 transitions. [2022-11-02 20:23:41,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 217 transitions. [2022-11-02 20:23:41,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:41,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:41,549 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:41,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:41,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:41,763 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:41,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:41,764 INFO L85 PathProgramCache]: Analyzing trace with hash 121115863, now seen corresponding path program 1 times [2022-11-02 20:23:41,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:41,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855594291] [2022-11-02 20:23:41,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:41,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:41,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:41,766 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:41,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-02 20:23:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:41,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:23:41,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:42,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:42,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:42,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855594291] [2022-11-02 20:23:42,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855594291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:42,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:42,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:42,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578419400] [2022-11-02 20:23:42,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:42,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:42,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:42,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:42,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:42,324 INFO L87 Difference]: Start difference. First operand 165 states and 217 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:42,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:42,416 INFO L93 Difference]: Finished difference Result 355 states and 496 transitions. [2022-11-02 20:23:42,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:42,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:42,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:42,418 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:42,418 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:42,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:42,419 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 172 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:42,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 445 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:23:42,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:42,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2022-11-02 20:23:42,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.319277108433735) internal successors, (219), 166 states have internal predecessors, (219), 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) [2022-11-02 20:23:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 219 transitions. [2022-11-02 20:23:42,426 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 219 transitions. Word has length 92 [2022-11-02 20:23:42,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:42,426 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 219 transitions. [2022-11-02 20:23:42,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:42,427 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 219 transitions. [2022-11-02 20:23:42,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:42,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:42,427 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:42,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:42,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:42,642 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:42,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:42,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1158747815, now seen corresponding path program 1 times [2022-11-02 20:23:42,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:42,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896185655] [2022-11-02 20:23:42,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:42,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:42,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:42,644 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:42,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-02 20:23:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:42,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:23:42,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:43,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:43,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896185655] [2022-11-02 20:23:43,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896185655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:43,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:43,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:23:43,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685715459] [2022-11-02 20:23:43,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:43,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:23:43,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:43,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:23:43,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:43,206 INFO L87 Difference]: Start difference. First operand 167 states and 219 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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) [2022-11-02 20:23:43,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:43,284 INFO L93 Difference]: Finished difference Result 400 states and 560 transitions. [2022-11-02 20:23:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:23:43,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:43,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:43,289 INFO L225 Difference]: With dead ends: 400 [2022-11-02 20:23:43,289 INFO L226 Difference]: Without dead ends: 311 [2022-11-02 20:23:43,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:23:43,290 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 347 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:43,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 678 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:43,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-02 20:23:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 169. [2022-11-02 20:23:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.3154761904761905) internal successors, (221), 168 states have internal predecessors, (221), 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) [2022-11-02 20:23:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 221 transitions. [2022-11-02 20:23:43,296 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 221 transitions. Word has length 92 [2022-11-02 20:23:43,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:43,297 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 221 transitions. [2022-11-02 20:23:43,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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) [2022-11-02 20:23:43,297 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 221 transitions. [2022-11-02 20:23:43,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:43,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:43,298 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:43,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-02 20:23:43,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:43,512 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:43,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:43,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1745553829, now seen corresponding path program 1 times [2022-11-02 20:23:43,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:43,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20698031] [2022-11-02 20:23:43,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:43,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:43,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:43,515 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:43,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-02 20:23:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:43,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:43,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:43,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:43,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:43,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20698031] [2022-11-02 20:23:43,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20698031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:43,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:43,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:43,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692350230] [2022-11-02 20:23:43,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:43,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:43,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:43,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:43,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:43,874 INFO L87 Difference]: Start difference. First operand 169 states and 221 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:43,931 INFO L93 Difference]: Finished difference Result 355 states and 494 transitions. [2022-11-02 20:23:43,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:43,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:43,933 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:43,934 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:43,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:43,935 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 160 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:43,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 464 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:43,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:43,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 171. [2022-11-02 20:23:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.311764705882353) internal successors, (223), 170 states have internal predecessors, (223), 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) [2022-11-02 20:23:43,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 223 transitions. [2022-11-02 20:23:43,941 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 223 transitions. Word has length 92 [2022-11-02 20:23:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:43,942 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 223 transitions. [2022-11-02 20:23:43,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:43,942 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 223 transitions. [2022-11-02 20:23:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:43,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:43,943 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:43,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:44,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:44,157 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:44,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:44,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1044489251, now seen corresponding path program 1 times [2022-11-02 20:23:44,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:44,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630556283] [2022-11-02 20:23:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:44,159 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:44,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:44,159 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:44,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-02 20:23:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:44,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:23:44,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:44,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:44,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:44,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630556283] [2022-11-02 20:23:44,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1630556283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:44,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:44,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:23:44,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341455792] [2022-11-02 20:23:44,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:44,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:23:44,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:44,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:23:44,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:44,716 INFO L87 Difference]: Start difference. First operand 171 states and 223 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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) [2022-11-02 20:23:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:44,797 INFO L93 Difference]: Finished difference Result 400 states and 558 transitions. [2022-11-02 20:23:44,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:23:44,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:44,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:44,799 INFO L225 Difference]: With dead ends: 400 [2022-11-02 20:23:44,799 INFO L226 Difference]: Without dead ends: 311 [2022-11-02 20:23:44,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:23:44,800 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 333 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:44,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 670 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:44,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-02 20:23:44,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 173. [2022-11-02 20:23:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.308139534883721) internal successors, (225), 172 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) [2022-11-02 20:23:44,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 225 transitions. [2022-11-02 20:23:44,806 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 225 transitions. Word has length 92 [2022-11-02 20:23:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:44,806 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 225 transitions. [2022-11-02 20:23:44,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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) [2022-11-02 20:23:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 225 transitions. [2022-11-02 20:23:44,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:44,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:44,807 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:44,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-02 20:23:45,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:45,021 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:45,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:45,022 INFO L85 PathProgramCache]: Analyzing trace with hash -364430881, now seen corresponding path program 1 times [2022-11-02 20:23:45,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:45,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094814767] [2022-11-02 20:23:45,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:45,023 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:45,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:45,024 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:45,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-02 20:23:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:45,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:45,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:45,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:45,323 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:45,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094814767] [2022-11-02 20:23:45,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094814767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:45,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:45,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:45,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848223505] [2022-11-02 20:23:45,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:45,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:45,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:45,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:45,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:45,325 INFO L87 Difference]: Start difference. First operand 173 states and 225 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:45,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:45,388 INFO L93 Difference]: Finished difference Result 355 states and 492 transitions. [2022-11-02 20:23:45,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:45,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2022-11-02 20:23:45,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:45,391 INFO L225 Difference]: With dead ends: 355 [2022-11-02 20:23:45,391 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:23:45,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:45,397 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 143 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:45,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 462 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:23:45,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:23:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 177. [2022-11-02 20:23:45,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.3068181818181819) internal successors, (230), 176 states have internal predecessors, (230), 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) [2022-11-02 20:23:45,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 230 transitions. [2022-11-02 20:23:45,414 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 230 transitions. Word has length 92 [2022-11-02 20:23:45,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:45,415 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 230 transitions. [2022-11-02 20:23:45,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2022-11-02 20:23:45,415 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 230 transitions. [2022-11-02 20:23:45,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:23:45,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:45,416 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:45,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:45,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:45,631 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:45,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:45,631 INFO L85 PathProgramCache]: Analyzing trace with hash -362583839, now seen corresponding path program 1 times [2022-11-02 20:23:45,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:45,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012243049] [2022-11-02 20:23:45,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:45,632 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:45,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:45,634 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:45,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-02 20:23:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:45,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-02 20:23:45,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:23:46,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:23:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:23:47,856 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:47,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012243049] [2022-11-02 20:23:47,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012243049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:23:47,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:23:47,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-02 20:23:47,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250820729] [2022-11-02 20:23:47,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:23:47,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:23:47,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:47,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:23:47,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:23:47,860 INFO L87 Difference]: Start difference. First operand 177 states and 230 transitions. Second operand has 18 states, 18 states have (on average 10.11111111111111) internal successors, (182), 18 states have internal predecessors, (182), 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) [2022-11-02 20:23:48,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:48,569 INFO L93 Difference]: Finished difference Result 438 states and 613 transitions. [2022-11-02 20:23:48,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:23:48,570 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.11111111111111) internal successors, (182), 18 states have internal predecessors, (182), 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 92 [2022-11-02 20:23:48,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:48,572 INFO L225 Difference]: With dead ends: 438 [2022-11-02 20:23:48,572 INFO L226 Difference]: Without dead ends: 436 [2022-11-02 20:23:48,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=231, Invalid=825, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:23:48,573 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 1091 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:48,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1091 Valid, 1877 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 111 Invalid, 0 Unknown, 202 Unchecked, 0.2s Time] [2022-11-02 20:23:48,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-11-02 20:23:48,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 264. [2022-11-02 20:23:48,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.3650190114068441) internal successors, (359), 263 states have internal predecessors, (359), 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) [2022-11-02 20:23:48,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 359 transitions. [2022-11-02 20:23:48,584 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 359 transitions. Word has length 92 [2022-11-02 20:23:48,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:48,585 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 359 transitions. [2022-11-02 20:23:48,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.11111111111111) internal successors, (182), 18 states have internal predecessors, (182), 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) [2022-11-02 20:23:48,585 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 359 transitions. [2022-11-02 20:23:48,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-02 20:23:48,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:48,587 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2022-11-02 20:23:48,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:48,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:48,802 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:48,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:48,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1502912079, now seen corresponding path program 1 times [2022-11-02 20:23:48,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:48,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204315206] [2022-11-02 20:23:48,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:48,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:48,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:48,805 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:48,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-02 20:23:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:49,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:23:49,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:49,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:23:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:49,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:49,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204315206] [2022-11-02 20:23:49,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204315206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:23:49,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:23:49,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-11-02 20:23:49,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871825385] [2022-11-02 20:23:49,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:23:49,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:23:49,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:49,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:23:49,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:23:49,861 INFO L87 Difference]: Start difference. First operand 264 states and 359 transitions. Second operand has 10 states, 10 states have (on average 26.7) internal successors, (267), 10 states have internal predecessors, (267), 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) [2022-11-02 20:23:50,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:50,337 INFO L93 Difference]: Finished difference Result 627 states and 889 transitions. [2022-11-02 20:23:50,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:23:50,338 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.7) internal successors, (267), 10 states have internal predecessors, (267), 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 179 [2022-11-02 20:23:50,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:50,340 INFO L225 Difference]: With dead ends: 627 [2022-11-02 20:23:50,340 INFO L226 Difference]: Without dead ends: 538 [2022-11-02 20:23:50,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:23:50,341 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 1084 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:50,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1084 Valid, 950 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:23:50,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-11-02 20:23:50,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 274. [2022-11-02 20:23:50,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.3553113553113554) internal successors, (370), 273 states have internal predecessors, (370), 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) [2022-11-02 20:23:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 370 transitions. [2022-11-02 20:23:50,353 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 370 transitions. Word has length 179 [2022-11-02 20:23:50,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:50,353 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 370 transitions. [2022-11-02 20:23:50,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.7) internal successors, (267), 10 states have internal predecessors, (267), 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) [2022-11-02 20:23:50,354 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 370 transitions. [2022-11-02 20:23:50,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-02 20:23:50,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:50,355 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:23:50,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:50,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:50,572 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:50,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:50,572 INFO L85 PathProgramCache]: Analyzing trace with hash 916635857, now seen corresponding path program 1 times [2022-11-02 20:23:50,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:50,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592622069] [2022-11-02 20:23:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:50,573 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:50,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:50,574 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:50,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-02 20:23:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:50,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:23:50,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:23:51,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:23:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:23:51,845 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:51,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592622069] [2022-11-02 20:23:51,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592622069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:23:51,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:23:51,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-02 20:23:51,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561167896] [2022-11-02 20:23:51,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:23:51,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:23:51,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:51,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:23:51,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:23:51,849 INFO L87 Difference]: Start difference. First operand 274 states and 370 transitions. Second operand has 18 states, 18 states have (on average 14.722222222222221) internal successors, (265), 18 states have internal predecessors, (265), 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) [2022-11-02 20:23:52,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:52,884 INFO L93 Difference]: Finished difference Result 831 states and 1180 transitions. [2022-11-02 20:23:52,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:23:52,884 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 14.722222222222221) internal successors, (265), 18 states have internal predecessors, (265), 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 179 [2022-11-02 20:23:52,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:52,887 INFO L225 Difference]: With dead ends: 831 [2022-11-02 20:23:52,887 INFO L226 Difference]: Without dead ends: 645 [2022-11-02 20:23:52,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 339 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:23:52,888 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 2388 mSDsluCounter, 3357 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2388 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:52,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2388 Valid, 3504 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:23:52,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-11-02 20:23:52,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 274. [2022-11-02 20:23:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.3516483516483517) internal successors, (369), 273 states have internal predecessors, (369), 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) [2022-11-02 20:23:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 369 transitions. [2022-11-02 20:23:52,899 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 369 transitions. Word has length 179 [2022-11-02 20:23:52,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:52,899 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 369 transitions. [2022-11-02 20:23:52,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.722222222222221) internal successors, (265), 18 states have internal predecessors, (265), 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) [2022-11-02 20:23:52,899 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 369 transitions. [2022-11-02 20:23:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-02 20:23:52,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:52,901 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:23:52,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-02 20:23:53,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:53,115 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:53,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:53,115 INFO L85 PathProgramCache]: Analyzing trace with hash -959846961, now seen corresponding path program 1 times [2022-11-02 20:23:53,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:53,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500557537] [2022-11-02 20:23:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:53,116 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:53,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:53,117 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:53,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-02 20:23:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:53,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:23:53,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 83 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:53,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:23:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:54,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:54,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500557537] [2022-11-02 20:23:54,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500557537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:23:54,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:23:54,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-11-02 20:23:54,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999973453] [2022-11-02 20:23:54,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:23:54,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:23:54,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:54,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:23:54,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:23:54,177 INFO L87 Difference]: Start difference. First operand 274 states and 369 transitions. Second operand has 19 states, 19 states have (on average 11.736842105263158) internal successors, (223), 19 states have internal predecessors, (223), 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) [2022-11-02 20:23:55,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:55,422 INFO L93 Difference]: Finished difference Result 1662 states and 2352 transitions. [2022-11-02 20:23:55,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:23:55,423 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 11.736842105263158) internal successors, (223), 19 states have internal predecessors, (223), 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 179 [2022-11-02 20:23:55,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:55,430 INFO L225 Difference]: With dead ends: 1662 [2022-11-02 20:23:55,430 INFO L226 Difference]: Without dead ends: 1476 [2022-11-02 20:23:55,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 20:23:55,432 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 1938 mSDsluCounter, 3119 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1938 SdHoareTripleChecker+Valid, 3285 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:55,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1938 Valid, 3285 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:23:55,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2022-11-02 20:23:55,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 506. [2022-11-02 20:23:55,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 1.3643564356435645) internal successors, (689), 505 states have internal predecessors, (689), 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) [2022-11-02 20:23:55,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 689 transitions. [2022-11-02 20:23:55,466 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 689 transitions. Word has length 179 [2022-11-02 20:23:55,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:55,466 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 689 transitions. [2022-11-02 20:23:55,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.736842105263158) internal successors, (223), 19 states have internal predecessors, (223), 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) [2022-11-02 20:23:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 689 transitions. [2022-11-02 20:23:55,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-02 20:23:55,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:55,469 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:23:55,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:55,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:55,685 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:55,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:55,686 INFO L85 PathProgramCache]: Analyzing trace with hash 365009233, now seen corresponding path program 1 times [2022-11-02 20:23:55,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:55,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992842920] [2022-11-02 20:23:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:55,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:55,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:55,688 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:55,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-02 20:23:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:56,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:23:56,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 81 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:56,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:23:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:56,766 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:56,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992842920] [2022-11-02 20:23:56,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992842920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:23:56,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:23:56,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-11-02 20:23:56,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342034259] [2022-11-02 20:23:56,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:23:56,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:23:56,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:56,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:23:56,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:23:56,771 INFO L87 Difference]: Start difference. First operand 506 states and 689 transitions. Second operand has 19 states, 19 states have (on average 11.736842105263158) internal successors, (223), 19 states have internal predecessors, (223), 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) [2022-11-02 20:23:57,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:57,931 INFO L93 Difference]: Finished difference Result 1472 states and 2074 transitions. [2022-11-02 20:23:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:23:57,931 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 11.736842105263158) internal successors, (223), 19 states have internal predecessors, (223), 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 179 [2022-11-02 20:23:57,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:57,937 INFO L225 Difference]: With dead ends: 1472 [2022-11-02 20:23:57,938 INFO L226 Difference]: Without dead ends: 1286 [2022-11-02 20:23:57,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 20:23:57,939 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 2297 mSDsluCounter, 2936 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2297 SdHoareTripleChecker+Valid, 3107 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:57,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2297 Valid, 3107 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:23:57,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2022-11-02 20:23:57,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 506. [2022-11-02 20:23:57,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 1.3603960396039605) internal successors, (687), 505 states have internal predecessors, (687), 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) [2022-11-02 20:23:57,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 687 transitions. [2022-11-02 20:23:57,961 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 687 transitions. Word has length 179 [2022-11-02 20:23:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:57,961 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 687 transitions. [2022-11-02 20:23:57,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.736842105263158) internal successors, (223), 19 states have internal predecessors, (223), 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) [2022-11-02 20:23:57,963 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 687 transitions. [2022-11-02 20:23:57,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-02 20:23:57,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:57,964 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:23:57,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:58,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:58,179 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:58,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:58,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1199237133, now seen corresponding path program 1 times [2022-11-02 20:23:58,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:58,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591573124] [2022-11-02 20:23:58,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:58,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:58,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:58,181 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:58,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-02 20:23:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:58,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:23:58,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-02 20:23:58,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:58,674 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:58,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591573124] [2022-11-02 20:23:58,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591573124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:58,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:58,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:23:58,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750476870] [2022-11-02 20:23:58,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:58,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:23:58,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:58,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:23:58,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:58,677 INFO L87 Difference]: Start difference. First operand 506 states and 687 transitions. Second operand has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 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) [2022-11-02 20:23:58,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:58,826 INFO L93 Difference]: Finished difference Result 847 states and 1160 transitions. [2022-11-02 20:23:58,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:23:58,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 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 179 [2022-11-02 20:23:58,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:58,829 INFO L225 Difference]: With dead ends: 847 [2022-11-02 20:23:58,830 INFO L226 Difference]: Without dead ends: 615 [2022-11-02 20:23:58,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:23:58,831 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 271 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:58,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 521 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:23:58,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-11-02 20:23:58,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 506. [2022-11-02 20:23:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 1.3564356435643565) internal successors, (685), 505 states have internal predecessors, (685), 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) [2022-11-02 20:23:58,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 685 transitions. [2022-11-02 20:23:58,849 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 685 transitions. Word has length 179 [2022-11-02 20:23:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:58,850 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 685 transitions. [2022-11-02 20:23:58,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 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) [2022-11-02 20:23:58,850 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 685 transitions. [2022-11-02 20:23:58,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-02 20:23:58,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:58,852 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:23:58,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-02 20:23:59,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:59,067 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:59,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:59,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1370457327, now seen corresponding path program 1 times [2022-11-02 20:23:59,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:59,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702578221] [2022-11-02 20:23:59,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:59,069 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:59,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:59,070 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:59,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-02 20:23:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:59,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:23:59,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-02 20:23:59,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:23:59,490 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:23:59,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702578221] [2022-11-02 20:23:59,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702578221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:23:59,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:23:59,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:23:59,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672430069] [2022-11-02 20:23:59,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:23:59,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:23:59,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:23:59,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:23:59,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:23:59,493 INFO L87 Difference]: Start difference. First operand 506 states and 685 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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) [2022-11-02 20:23:59,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:59,540 INFO L93 Difference]: Finished difference Result 877 states and 1222 transitions. [2022-11-02 20:23:59,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:23:59,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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 179 [2022-11-02 20:23:59,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:59,543 INFO L225 Difference]: With dead ends: 877 [2022-11-02 20:23:59,543 INFO L226 Difference]: Without dead ends: 643 [2022-11-02 20:23:59,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:23:59,545 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 241 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:59,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 427 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:23:59,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-11-02 20:23:59,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 458. [2022-11-02 20:23:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.3829321663019694) internal successors, (632), 457 states have internal predecessors, (632), 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) [2022-11-02 20:23:59,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 632 transitions. [2022-11-02 20:23:59,563 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 632 transitions. Word has length 179 [2022-11-02 20:23:59,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:59,563 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 632 transitions. [2022-11-02 20:23:59,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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) [2022-11-02 20:23:59,563 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 632 transitions. [2022-11-02 20:23:59,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-02 20:23:59,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:59,565 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:23:59,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:59,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:23:59,783 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:23:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:59,783 INFO L85 PathProgramCache]: Analyzing trace with hash 662466973, now seen corresponding path program 2 times [2022-11-02 20:23:59,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:23:59,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165015613] [2022-11-02 20:23:59,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:23:59,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:23:59,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:23:59,786 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:23:59,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-02 20:24:00,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:24:00,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:24:00,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:24:00,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 14 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-02 20:24:00,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 191 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-02 20:24:00,785 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:24:00,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165015613] [2022-11-02 20:24:00,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165015613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:00,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:24:00,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-02 20:24:00,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008057754] [2022-11-02 20:24:00,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:00,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:24:00,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:24:00,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:24:00,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:24:00,788 INFO L87 Difference]: Start difference. First operand 458 states and 632 transitions. Second operand has 11 states, 11 states have (on average 22.727272727272727) internal successors, (250), 11 states have internal predecessors, (250), 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) [2022-11-02 20:24:01,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:01,219 INFO L93 Difference]: Finished difference Result 2094 states and 3000 transitions. [2022-11-02 20:24:01,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:24:01,220 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 22.727272727272727) internal successors, (250), 11 states have internal predecessors, (250), 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 266 [2022-11-02 20:24:01,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:01,224 INFO L225 Difference]: With dead ends: 2094 [2022-11-02 20:24:01,224 INFO L226 Difference]: Without dead ends: 1724 [2022-11-02 20:24:01,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:24:01,225 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 943 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:01,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [943 Valid, 1495 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:24:01,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2022-11-02 20:24:01,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 826. [2022-11-02 20:24:01,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 1.4084848484848485) internal successors, (1162), 825 states have internal predecessors, (1162), 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) [2022-11-02 20:24:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1162 transitions. [2022-11-02 20:24:01,266 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1162 transitions. Word has length 266 [2022-11-02 20:24:01,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:01,267 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 1162 transitions. [2022-11-02 20:24:01,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.727272727272727) internal successors, (250), 11 states have internal predecessors, (250), 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) [2022-11-02 20:24:01,267 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1162 transitions. [2022-11-02 20:24:01,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-02 20:24:01,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:01,270 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:24:01,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:01,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:24:01,489 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:01,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:01,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1062141349, now seen corresponding path program 3 times [2022-11-02 20:24:01,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:24:01,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381107184] [2022-11-02 20:24:01,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:24:01,491 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:24:01,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:24:01,493 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:24:01,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-02 20:24:01,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:24:01,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:24:01,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:24:01,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-02 20:24:01,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:24:01,819 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:24:01,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381107184] [2022-11-02 20:24:01,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381107184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:24:01,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:24:01,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:24:01,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337492220] [2022-11-02 20:24:01,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:24:01,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:24:01,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:24:01,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:24:01,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:24:01,822 INFO L87 Difference]: Start difference. First operand 826 states and 1162 transitions. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 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) [2022-11-02 20:24:01,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:01,943 INFO L93 Difference]: Finished difference Result 2248 states and 3222 transitions. [2022-11-02 20:24:01,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:24:01,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 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 266 [2022-11-02 20:24:01,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:01,949 INFO L225 Difference]: With dead ends: 2248 [2022-11-02 20:24:01,949 INFO L226 Difference]: Without dead ends: 1508 [2022-11-02 20:24:01,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:24:01,951 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 232 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:01,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 655 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:24:01,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2022-11-02 20:24:01,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 840. [2022-11-02 20:24:01,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 1.400476758045292) internal successors, (1175), 839 states have internal predecessors, (1175), 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) [2022-11-02 20:24:01,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1175 transitions. [2022-11-02 20:24:01,990 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1175 transitions. Word has length 266 [2022-11-02 20:24:01,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:01,990 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 1175 transitions. [2022-11-02 20:24:01,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 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) [2022-11-02 20:24:01,991 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1175 transitions. [2022-11-02 20:24:01,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-02 20:24:01,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:01,993 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:24:02,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:02,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:24:02,207 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:02,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:02,208 INFO L85 PathProgramCache]: Analyzing trace with hash 743413659, now seen corresponding path program 1 times [2022-11-02 20:24:02,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:24:02,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365631083] [2022-11-02 20:24:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:02,209 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:24:02,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:24:02,209 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:24:02,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-02 20:24:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:02,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:24:02,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 18 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-02 20:24:02,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 195 proven. 1 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-02 20:24:03,296 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:24:03,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365631083] [2022-11-02 20:24:03,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365631083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:03,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:24:03,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-11-02 20:24:03,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009371762] [2022-11-02 20:24:03,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:03,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:24:03,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:24:03,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:24:03,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:24:03,299 INFO L87 Difference]: Start difference. First operand 840 states and 1175 transitions. Second operand has 19 states, 19 states have (on average 12.631578947368421) internal successors, (240), 19 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:04,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:04,504 INFO L93 Difference]: Finished difference Result 3344 states and 4777 transitions. [2022-11-02 20:24:04,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:24:04,504 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 12.631578947368421) internal successors, (240), 19 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-02 20:24:04,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:04,512 INFO L225 Difference]: With dead ends: 3344 [2022-11-02 20:24:04,513 INFO L226 Difference]: Without dead ends: 2590 [2022-11-02 20:24:04,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 20:24:04,515 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 3320 mSDsluCounter, 2141 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3320 SdHoareTripleChecker+Valid, 2310 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:04,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3320 Valid, 2310 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:24:04,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2022-11-02 20:24:04,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 840. [2022-11-02 20:24:04,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 1.3957091775923718) internal successors, (1171), 839 states have internal predecessors, (1171), 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) [2022-11-02 20:24:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1171 transitions. [2022-11-02 20:24:04,563 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1171 transitions. Word has length 266 [2022-11-02 20:24:04,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:04,563 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 1171 transitions. [2022-11-02 20:24:04,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 12.631578947368421) internal successors, (240), 19 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:04,564 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1171 transitions. [2022-11-02 20:24:04,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-02 20:24:04,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:04,567 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:24:04,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:04,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:24:04,783 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:04,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:04,784 INFO L85 PathProgramCache]: Analyzing trace with hash -42584231, now seen corresponding path program 2 times [2022-11-02 20:24:04,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:24:04,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246231676] [2022-11-02 20:24:04,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:24:04,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:24:04,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:24:04,788 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:24:04,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-02 20:24:05,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:24:05,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:24:05,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:24:05,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 22 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-02 20:24:05,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 199 proven. 1 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-02 20:24:05,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:24:05,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246231676] [2022-11-02 20:24:05,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246231676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:05,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:24:05,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-02 20:24:05,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461265475] [2022-11-02 20:24:05,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:05,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:24:05,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:24:05,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:24:05,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:24:05,829 INFO L87 Difference]: Start difference. First operand 840 states and 1171 transitions. Second operand has 11 states, 11 states have (on average 23.454545454545453) internal successors, (258), 11 states have internal predecessors, (258), 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) [2022-11-02 20:24:06,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:06,270 INFO L93 Difference]: Finished difference Result 2476 states and 3511 transitions. [2022-11-02 20:24:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:24:06,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 23.454545454545453) internal successors, (258), 11 states have internal predecessors, (258), 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 266 [2022-11-02 20:24:06,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:06,276 INFO L225 Difference]: With dead ends: 2476 [2022-11-02 20:24:06,276 INFO L226 Difference]: Without dead ends: 1722 [2022-11-02 20:24:06,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:24:06,287 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 924 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:06,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 1709 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:24:06,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2022-11-02 20:24:06,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 840. [2022-11-02 20:24:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 1.3909415971394516) internal successors, (1167), 839 states have internal predecessors, (1167), 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) [2022-11-02 20:24:06,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1167 transitions. [2022-11-02 20:24:06,326 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1167 transitions. Word has length 266 [2022-11-02 20:24:06,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:06,327 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 1167 transitions. [2022-11-02 20:24:06,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.454545454545453) internal successors, (258), 11 states have internal predecessors, (258), 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) [2022-11-02 20:24:06,328 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1167 transitions. [2022-11-02 20:24:06,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-02 20:24:06,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:06,330 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:24:06,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:06,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:24:06,548 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:06,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:06,548 INFO L85 PathProgramCache]: Analyzing trace with hash 938370583, now seen corresponding path program 3 times [2022-11-02 20:24:06,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:24:06,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665354174] [2022-11-02 20:24:06,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:24:06,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:24:06,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:24:06,551 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:24:06,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-02 20:24:06,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:24:06,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:24:06,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:24:06,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-02 20:24:06,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:24:06,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:24:06,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665354174] [2022-11-02 20:24:06,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665354174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:24:06,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:24:06,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:24:06,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703197990] [2022-11-02 20:24:06,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:24:06,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:24:06,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:24:06,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:24:06,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:24:06,909 INFO L87 Difference]: Start difference. First operand 840 states and 1167 transitions. Second operand has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 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) [2022-11-02 20:24:07,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:07,045 INFO L93 Difference]: Finished difference Result 2400 states and 3378 transitions. [2022-11-02 20:24:07,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:24:07,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 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 266 [2022-11-02 20:24:07,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:07,052 INFO L225 Difference]: With dead ends: 2400 [2022-11-02 20:24:07,052 INFO L226 Difference]: Without dead ends: 2022 [2022-11-02 20:24:07,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:24:07,054 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 361 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:07,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 761 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:24:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2022-11-02 20:24:07,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 888. [2022-11-02 20:24:07,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 1.3900789177001127) internal successors, (1233), 887 states have internal predecessors, (1233), 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) [2022-11-02 20:24:07,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1233 transitions. [2022-11-02 20:24:07,114 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1233 transitions. Word has length 266 [2022-11-02 20:24:07,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:07,115 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1233 transitions. [2022-11-02 20:24:07,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 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) [2022-11-02 20:24:07,115 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1233 transitions. [2022-11-02 20:24:07,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-02 20:24:07,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:07,119 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:24:07,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-02 20:24:07,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:24:07,333 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:07,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:07,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1905721237, now seen corresponding path program 1 times [2022-11-02 20:24:07,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:24:07,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993154208] [2022-11-02 20:24:07,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:07,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:24:07,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:24:07,337 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:24:07,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-02 20:24:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:07,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:24:07,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 26 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-02 20:24:08,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 203 proven. 1 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-02 20:24:08,464 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:24:08,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993154208] [2022-11-02 20:24:08,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993154208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:08,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:24:08,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-02 20:24:08,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354113049] [2022-11-02 20:24:08,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:08,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:24:08,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:24:08,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:24:08,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:24:08,467 INFO L87 Difference]: Start difference. First operand 888 states and 1233 transitions. Second operand has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 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) [2022-11-02 20:24:08,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:08,856 INFO L93 Difference]: Finished difference Result 4328 states and 6125 transitions. [2022-11-02 20:24:08,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:24:08,856 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 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 266 [2022-11-02 20:24:08,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:08,867 INFO L225 Difference]: With dead ends: 4328 [2022-11-02 20:24:08,867 INFO L226 Difference]: Without dead ends: 3526 [2022-11-02 20:24:08,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:24:08,869 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 1148 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 1541 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:08,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1148 Valid, 1541 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:24:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3526 states. [2022-11-02 20:24:08,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3526 to 1688. [2022-11-02 20:24:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 1.4007113218731475) internal successors, (2363), 1687 states have internal predecessors, (2363), 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) [2022-11-02 20:24:08,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2363 transitions. [2022-11-02 20:24:08,984 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2363 transitions. Word has length 266 [2022-11-02 20:24:08,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:08,985 INFO L495 AbstractCegarLoop]: Abstraction has 1688 states and 2363 transitions. [2022-11-02 20:24:08,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 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) [2022-11-02 20:24:08,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2363 transitions. [2022-11-02 20:24:08,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-02 20:24:08,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:08,991 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:24:09,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-02 20:24:09,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:24:09,209 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:09,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:09,209 INFO L85 PathProgramCache]: Analyzing trace with hash -494912173, now seen corresponding path program 2 times [2022-11-02 20:24:09,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:24:09,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059084506] [2022-11-02 20:24:09,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:24:09,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:24:09,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:24:09,211 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:24:09,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-02 20:24:09,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:24:09,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:24:09,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:24:09,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 30 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-02 20:24:09,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 30 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-02 20:24:10,255 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:24:10,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059084506] [2022-11-02 20:24:10,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059084506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:10,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:24:10,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-11-02 20:24:10,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661667195] [2022-11-02 20:24:10,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:10,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:24:10,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:24:10,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:24:10,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:24:10,257 INFO L87 Difference]: Start difference. First operand 1688 states and 2363 transitions. Second operand has 19 states, 19 states have (on average 12.631578947368421) internal successors, (240), 19 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:11,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:11,661 INFO L93 Difference]: Finished difference Result 12300 states and 17457 transitions. [2022-11-02 20:24:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:24:11,661 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 12.631578947368421) internal successors, (240), 19 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-02 20:24:11,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:11,679 INFO L225 Difference]: With dead ends: 12300 [2022-11-02 20:24:11,679 INFO L226 Difference]: Without dead ends: 10698 [2022-11-02 20:24:11,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=578, Invalid=1972, Unknown=0, NotChecked=0, Total=2550 [2022-11-02 20:24:11,682 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 3657 mSDsluCounter, 1424 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3657 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:11,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3657 Valid, 1557 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:24:11,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10698 states. [2022-11-02 20:24:11,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10698 to 3440. [2022-11-02 20:24:11,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 1.3966269264321023) internal successors, (4803), 3439 states have internal predecessors, (4803), 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) [2022-11-02 20:24:11,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 4803 transitions. [2022-11-02 20:24:11,863 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 4803 transitions. Word has length 266 [2022-11-02 20:24:11,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:11,864 INFO L495 AbstractCegarLoop]: Abstraction has 3440 states and 4803 transitions. [2022-11-02 20:24:11,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 12.631578947368421) internal successors, (240), 19 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:11,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 4803 transitions. [2022-11-02 20:24:11,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-02 20:24:11,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:11,871 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:24:11,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-02 20:24:12,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:24:12,084 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:12,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:12,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1202014995, now seen corresponding path program 1 times [2022-11-02 20:24:12,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:24:12,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291439140] [2022-11-02 20:24:12,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:12,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:24:12,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:24:12,087 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:24:12,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-02 20:24:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:12,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:24:12,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-02 20:24:12,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 209 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-02 20:24:13,104 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:24:13,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291439140] [2022-11-02 20:24:13,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291439140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:13,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:24:13,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-02 20:24:13,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897977001] [2022-11-02 20:24:13,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:13,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:24:13,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:24:13,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:24:13,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:24:13,106 INFO L87 Difference]: Start difference. First operand 3440 states and 4803 transitions. Second operand has 11 states, 11 states have (on average 25.454545454545453) internal successors, (280), 11 states have internal predecessors, (280), 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) [2022-11-02 20:24:13,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:13,699 INFO L93 Difference]: Finished difference Result 17688 states and 24935 transitions. [2022-11-02 20:24:13,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:24:13,700 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 25.454545454545453) internal successors, (280), 11 states have internal predecessors, (280), 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 266 [2022-11-02 20:24:13,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:13,722 INFO L225 Difference]: With dead ends: 17688 [2022-11-02 20:24:13,723 INFO L226 Difference]: Without dead ends: 14390 [2022-11-02 20:24:13,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:24:13,727 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 1050 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:13,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1050 Valid, 1346 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:24:13,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14390 states. [2022-11-02 20:24:14,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14390 to 6736. [2022-11-02 20:24:14,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6736 states, 6735 states have (on average 1.3985152190051968) internal successors, (9419), 6735 states have internal predecessors, (9419), 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) [2022-11-02 20:24:14,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6736 states to 6736 states and 9419 transitions. [2022-11-02 20:24:14,146 INFO L78 Accepts]: Start accepts. Automaton has 6736 states and 9419 transitions. Word has length 266 [2022-11-02 20:24:14,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:14,146 INFO L495 AbstractCegarLoop]: Abstraction has 6736 states and 9419 transitions. [2022-11-02 20:24:14,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.454545454545453) internal successors, (280), 11 states have internal predecessors, (280), 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) [2022-11-02 20:24:14,147 INFO L276 IsEmpty]: Start isEmpty. Operand 6736 states and 9419 transitions. [2022-11-02 20:24:14,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-02 20:24:14,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:14,169 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:24:14,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:14,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:24:14,390 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:14,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:14,390 INFO L85 PathProgramCache]: Analyzing trace with hash -121163951, now seen corresponding path program 2 times [2022-11-02 20:24:14,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:24:14,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157070096] [2022-11-02 20:24:14,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:24:14,392 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:24:14,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:24:14,393 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:24:14,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-02 20:24:14,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:24:14,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:24:14,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:24:14,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 36 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-02 20:24:15,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 36 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-02 20:24:15,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:24:15,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157070096] [2022-11-02 20:24:15,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157070096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:15,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:24:15,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-11-02 20:24:15,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458858027] [2022-11-02 20:24:15,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:15,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:24:15,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:24:15,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:24:15,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:24:15,439 INFO L87 Difference]: Start difference. First operand 6736 states and 9419 transitions. Second operand has 19 states, 19 states have (on average 13.263157894736842) internal successors, (252), 19 states have internal predecessors, (252), 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) [2022-11-02 20:24:17,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:17,531 INFO L93 Difference]: Finished difference Result 49024 states and 69163 transitions. [2022-11-02 20:24:17,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:24:17,532 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 13.263157894736842) internal successors, (252), 19 states have internal predecessors, (252), 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 266 [2022-11-02 20:24:17,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:17,579 INFO L225 Difference]: With dead ends: 49024 [2022-11-02 20:24:17,580 INFO L226 Difference]: Without dead ends: 42430 [2022-11-02 20:24:17,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=578, Invalid=1972, Unknown=0, NotChecked=0, Total=2550 [2022-11-02 20:24:17,589 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 3830 mSDsluCounter, 1744 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3830 SdHoareTripleChecker+Valid, 1882 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:17,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3830 Valid, 1882 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:24:17,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42430 states. [2022-11-02 20:24:18,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42430 to 13812. [2022-11-02 20:24:18,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13812 states, 13811 states have (on average 1.3928752443704293) internal successors, (19237), 13811 states have internal predecessors, (19237), 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) [2022-11-02 20:24:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13812 states to 13812 states and 19237 transitions. [2022-11-02 20:24:18,381 INFO L78 Accepts]: Start accepts. Automaton has 13812 states and 19237 transitions. Word has length 266 [2022-11-02 20:24:18,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:18,381 INFO L495 AbstractCegarLoop]: Abstraction has 13812 states and 19237 transitions. [2022-11-02 20:24:18,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.263157894736842) internal successors, (252), 19 states have internal predecessors, (252), 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) [2022-11-02 20:24:18,382 INFO L276 IsEmpty]: Start isEmpty. Operand 13812 states and 19237 transitions. [2022-11-02 20:24:18,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-02 20:24:18,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:18,413 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:24:18,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:18,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:24:18,627 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:18,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:18,627 INFO L85 PathProgramCache]: Analyzing trace with hash 725191953, now seen corresponding path program 1 times [2022-11-02 20:24:18,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:24:18,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805740432] [2022-11-02 20:24:18,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:18,629 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:24:18,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:24:18,630 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:24:18,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-02 20:24:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:19,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:24:19,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 42 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-02 20:24:19,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 42 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-02 20:24:19,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:24:19,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805740432] [2022-11-02 20:24:19,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805740432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:19,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:24:19,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-11-02 20:24:19,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483313793] [2022-11-02 20:24:19,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:19,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:24:19,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:24:19,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:24:19,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:24:19,877 INFO L87 Difference]: Start difference. First operand 13812 states and 19237 transitions. Second operand has 19 states, 19 states have (on average 13.578947368421053) internal successors, (258), 19 states have internal predecessors, (258), 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) [2022-11-02 20:24:22,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:22,407 INFO L93 Difference]: Finished difference Result 52452 states and 73925 transitions. [2022-11-02 20:24:22,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-02 20:24:22,407 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 13.578947368421053) internal successors, (258), 19 states have internal predecessors, (258), 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 266 [2022-11-02 20:24:22,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:22,444 INFO L225 Difference]: With dead ends: 52452 [2022-11-02 20:24:22,444 INFO L226 Difference]: Without dead ends: 45282 [2022-11-02 20:24:22,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=881, Invalid=3151, Unknown=0, NotChecked=0, Total=4032 [2022-11-02 20:24:22,454 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 3723 mSDsluCounter, 2406 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3723 SdHoareTripleChecker+Valid, 2547 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:22,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3723 Valid, 2547 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:24:22,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45282 states. [2022-11-02 20:24:23,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45282 to 14580. [2022-11-02 20:24:23,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14580 states, 14579 states have (on average 1.3897386652033747) internal successors, (20261), 14579 states have internal predecessors, (20261), 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) [2022-11-02 20:24:23,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14580 states to 14580 states and 20261 transitions. [2022-11-02 20:24:23,343 INFO L78 Accepts]: Start accepts. Automaton has 14580 states and 20261 transitions. Word has length 266 [2022-11-02 20:24:23,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:23,344 INFO L495 AbstractCegarLoop]: Abstraction has 14580 states and 20261 transitions. [2022-11-02 20:24:23,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.578947368421053) internal successors, (258), 19 states have internal predecessors, (258), 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) [2022-11-02 20:24:23,344 INFO L276 IsEmpty]: Start isEmpty. Operand 14580 states and 20261 transitions. [2022-11-02 20:24:23,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-02 20:24:23,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:23,365 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:24:23,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:23,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:24:23,568 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:23,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:23,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1668546211, now seen corresponding path program 1 times [2022-11-02 20:24:23,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:24:23,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698503442] [2022-11-02 20:24:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:23,570 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:24:23,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:24:23,571 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:24:23,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-02 20:24:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:24,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:24:24,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 44 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 20:24:24,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 44 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 20:24:25,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:24:25,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698503442] [2022-11-02 20:24:25,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698503442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:25,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:24:25,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-11-02 20:24:25,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666836810] [2022-11-02 20:24:25,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:25,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:24:25,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:24:25,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:24:25,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:24:25,039 INFO L87 Difference]: Start difference. First operand 14580 states and 20261 transitions. Second operand has 13 states, 13 states have (on average 27.307692307692307) internal successors, (355), 13 states have internal predecessors, (355), 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) [2022-11-02 20:24:27,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:27,104 INFO L93 Difference]: Finished difference Result 72828 states and 101417 transitions. [2022-11-02 20:24:27,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:24:27,104 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 27.307692307692307) internal successors, (355), 13 states have internal predecessors, (355), 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 266 [2022-11-02 20:24:27,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:27,141 INFO L225 Difference]: With dead ends: 72828 [2022-11-02 20:24:27,141 INFO L226 Difference]: Without dead ends: 58490 [2022-11-02 20:24:27,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:24:27,151 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 888 mSDsluCounter, 1557 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1738 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:27,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 1738 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:24:27,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58490 states. [2022-11-02 20:24:28,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58490 to 28916. [2022-11-02 20:24:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28916 states, 28915 states have (on average 1.387964724191596) internal successors, (40133), 28915 states have internal predecessors, (40133), 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) [2022-11-02 20:24:28,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28916 states to 28916 states and 40133 transitions. [2022-11-02 20:24:28,510 INFO L78 Accepts]: Start accepts. Automaton has 28916 states and 40133 transitions. Word has length 266 [2022-11-02 20:24:28,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:28,511 INFO L495 AbstractCegarLoop]: Abstraction has 28916 states and 40133 transitions. [2022-11-02 20:24:28,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 27.307692307692307) internal successors, (355), 13 states have internal predecessors, (355), 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) [2022-11-02 20:24:28,511 INFO L276 IsEmpty]: Start isEmpty. Operand 28916 states and 40133 transitions. [2022-11-02 20:24:28,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-02 20:24:28,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:28,555 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:24:28,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-02 20:24:28,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:24:28,756 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:28,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:28,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1008980635, now seen corresponding path program 2 times [2022-11-02 20:24:28,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:24:28,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902397685] [2022-11-02 20:24:28,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:24:28,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:24:28,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:24:28,758 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:24:28,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-02 20:24:29,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:24:29,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:24:29,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:24:29,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:30,269 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-02 20:24:30,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-02 20:24:30,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:24:30,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902397685] [2022-11-02 20:24:30,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902397685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:30,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:24:30,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-11-02 20:24:30,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257494823] [2022-11-02 20:24:30,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:30,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:24:30,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:24:30,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:24:30,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:24:30,751 INFO L87 Difference]: Start difference. First operand 28916 states and 40133 transitions. Second operand has 12 states, 12 states have (on average 22.916666666666668) internal successors, (275), 12 states have internal predecessors, (275), 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) [2022-11-02 20:24:34,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:34,449 INFO L93 Difference]: Finished difference Result 150012 states and 208841 transitions. [2022-11-02 20:24:34,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:24:34,449 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 22.916666666666668) internal successors, (275), 12 states have internal predecessors, (275), 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 266 [2022-11-02 20:24:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:34,555 INFO L225 Difference]: With dead ends: 150012 [2022-11-02 20:24:34,555 INFO L226 Difference]: Without dead ends: 121338 [2022-11-02 20:24:34,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 519 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:24:34,587 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 1147 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1147 SdHoareTripleChecker+Valid, 1689 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:34,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1147 Valid, 1689 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:24:34,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121338 states. [2022-11-02 20:24:36,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121338 to 57588. [2022-11-02 20:24:36,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57588 states, 57587 states have (on average 1.3848438015524338) internal successors, (79749), 57587 states have internal predecessors, (79749), 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) [2022-11-02 20:24:36,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57588 states to 57588 states and 79749 transitions. [2022-11-02 20:24:36,872 INFO L78 Accepts]: Start accepts. Automaton has 57588 states and 79749 transitions. Word has length 266 [2022-11-02 20:24:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:36,872 INFO L495 AbstractCegarLoop]: Abstraction has 57588 states and 79749 transitions. [2022-11-02 20:24:36,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 22.916666666666668) internal successors, (275), 12 states have internal predecessors, (275), 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) [2022-11-02 20:24:36,872 INFO L276 IsEmpty]: Start isEmpty. Operand 57588 states and 79749 transitions. [2022-11-02 20:24:37,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-02 20:24:37,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:37,123 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:24:37,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:37,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:24:37,343 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:37,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:37,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1297800025, now seen corresponding path program 3 times [2022-11-02 20:24:37,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:24:37,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248643636] [2022-11-02 20:24:37,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:24:37,345 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:24:37,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:24:37,346 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:24:37,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-02 20:24:37,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:24:37,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:24:37,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:24:37,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:38,383 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 148 proven. 26 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-02 20:24:38,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 148 proven. 26 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-02 20:24:38,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:24:38,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248643636] [2022-11-02 20:24:38,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248643636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:38,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:24:38,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-11-02 20:24:38,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496736389] [2022-11-02 20:24:38,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:38,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:24:38,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:24:38,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:24:38,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:24:38,865 INFO L87 Difference]: Start difference. First operand 57588 states and 79749 transitions. Second operand has 10 states, 10 states have (on average 30.4) internal successors, (304), 10 states have internal predecessors, (304), 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) [2022-11-02 20:24:43,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:43,676 INFO L93 Difference]: Finished difference Result 175962 states and 243640 transitions. [2022-11-02 20:24:43,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:24:43,676 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 30.4) internal successors, (304), 10 states have internal predecessors, (304), 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 266 [2022-11-02 20:24:43,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:43,792 INFO L225 Difference]: With dead ends: 175962 [2022-11-02 20:24:43,792 INFO L226 Difference]: Without dead ends: 147288 [2022-11-02 20:24:43,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:24:43,829 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 413 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:43,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 1383 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:24:43,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147288 states. [2022-11-02 20:24:46,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147288 to 61684. [2022-11-02 20:24:46,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61684 states, 61683 states have (on average 1.3790023183048814) internal successors, (85061), 61683 states have internal predecessors, (85061), 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) [2022-11-02 20:24:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61684 states to 61684 states and 85061 transitions. [2022-11-02 20:24:46,322 INFO L78 Accepts]: Start accepts. Automaton has 61684 states and 85061 transitions. Word has length 266 [2022-11-02 20:24:46,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:24:46,323 INFO L495 AbstractCegarLoop]: Abstraction has 61684 states and 85061 transitions. [2022-11-02 20:24:46,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.4) internal successors, (304), 10 states have internal predecessors, (304), 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) [2022-11-02 20:24:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 61684 states and 85061 transitions. [2022-11-02 20:24:46,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-02 20:24:46,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:24:46,379 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:24:46,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:46,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:24:46,580 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:24:46,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:46,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1263062821, now seen corresponding path program 1 times [2022-11-02 20:24:46,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:24:46,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051074156] [2022-11-02 20:24:46,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:46,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:24:46,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:24:46,583 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:24:46,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b4c8a5-d3cc-4de7-9801-fe078d7a313f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-02 20:24:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:46,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:24:46,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 178 proven. 48 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-02 20:24:47,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 225 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-02 20:24:47,813 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:24:47,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051074156] [2022-11-02 20:24:47,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051074156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:47,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:24:47,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2022-11-02 20:24:47,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315033707] [2022-11-02 20:24:47,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:47,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:24:47,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:24:47,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:24:47,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:24:47,815 INFO L87 Difference]: Start difference. First operand 61684 states and 85061 transitions. Second operand has 17 states, 17 states have (on average 17.41176470588235) internal successors, (296), 17 states have internal predecessors, (296), 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) [2022-11-02 20:24:56,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:24:56,880 INFO L93 Difference]: Finished difference Result 381694 states and 526986 transitions. [2022-11-02 20:24:56,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:24:56,880 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 17.41176470588235) internal successors, (296), 17 states have internal predecessors, (296), 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 266 [2022-11-02 20:24:56,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:24:57,151 INFO L225 Difference]: With dead ends: 381694 [2022-11-02 20:24:57,151 INFO L226 Difference]: Without dead ends: 320252 [2022-11-02 20:24:57,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=837, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:24:57,212 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 1696 mSDsluCounter, 2463 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1696 SdHoareTripleChecker+Valid, 2683 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:24:57,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1696 Valid, 2683 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:24:57,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320252 states.