./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 68864d90c2581c7e2b9a72172352bcf9279d03107788434bd4ac5af6cc5db51a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:35:49,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:35:49,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:35:49,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:35:49,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:35:49,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:35:49,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:35:49,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:35:49,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:35:49,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:35:49,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:35:49,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:35:49,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:35:49,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:35:49,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:35:49,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:35:49,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:35:49,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:35:49,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:35:49,618 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:35:49,620 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:35:49,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:35:49,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:35:49,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:35:49,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:35:49,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:35:49,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:35:49,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:35:49,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:35:49,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:35:49,633 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:35:49,634 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:35:49,635 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:35:49,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:35:49,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:35:49,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:35:49,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:35:49,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:35:49,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:35:49,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:35:49,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:35:49,642 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:35:49,664 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:35:49,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:35:49,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:35:49,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:35:49,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:35:49,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:35:49,667 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:35:49,667 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:35:49,668 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:35:49,668 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:35:49,668 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:35:49,669 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:35:49,669 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:35:49,669 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:35:49,670 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:35:49,670 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:35:49,670 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:35:49,670 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:35:49,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:35:49,672 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:35:49,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:35:49,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:35:49,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:35:49,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:35:49,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:35:49,673 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:35:49,673 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:35:49,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:35:49,674 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:35:49,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:35:49,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:35:49,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:35:49,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:35:49,675 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:35:49,675 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:35:49,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:35:49,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:35:49,676 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:35:49,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:35:49,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:35:49,677 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:35:49,677 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_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68864d90c2581c7e2b9a72172352bcf9279d03107788434bd4ac5af6cc5db51a [2022-11-22 01:35:49,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:35:50,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:35:50,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:35:50,017 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:35:50,018 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:35:50,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2022-11-22 01:35:52,992 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:35:53,317 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:35:53,318 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2022-11-22 01:35:53,338 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/data/92a80f1b0/e11e136a2b354d959a75681af9bc853a/FLAG8ed67aabc [2022-11-22 01:35:53,354 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/data/92a80f1b0/e11e136a2b354d959a75681af9bc853a [2022-11-22 01:35:53,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:35:53,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:35:53,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:35:53,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:35:53,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:35:53,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:35:53" (1/1) ... [2022-11-22 01:35:53,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78649578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:35:53, skipping insertion in model container [2022-11-22 01:35:53,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:35:53" (1/1) ... [2022-11-22 01:35:53,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:35:53,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:35:53,904 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c[23488,23501] [2022-11-22 01:35:54,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:35:54,073 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:35:54,132 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c[23488,23501] [2022-11-22 01:35:54,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:35:54,252 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:35:54,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:35:54 WrapperNode [2022-11-22 01:35:54,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:35:54,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:35:54,254 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:35:54,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:35:54,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:35:54" (1/1) ... [2022-11-22 01:35:54,314 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:35:54" (1/1) ... [2022-11-22 01:35:54,361 INFO L138 Inliner]: procedures = 91, calls = 331, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 805 [2022-11-22 01:35:54,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:35:54,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:35:54,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:35:54,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:35:54,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:35:54" (1/1) ... [2022-11-22 01:35:54,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:35:54" (1/1) ... [2022-11-22 01:35:54,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:35:54" (1/1) ... [2022-11-22 01:35:54,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:35:54" (1/1) ... [2022-11-22 01:35:54,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:35:54" (1/1) ... [2022-11-22 01:35:54,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:35:54" (1/1) ... [2022-11-22 01:35:54,411 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:35:54" (1/1) ... [2022-11-22 01:35:54,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:35:54" (1/1) ... [2022-11-22 01:35:54,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:35:54,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:35:54,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:35:54,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:35:54,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:35:54" (1/1) ... [2022-11-22 01:35:54,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:35:54,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:35:54,457 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:35:54,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:35:54,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:35:54,522 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-22 01:35:54,522 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-22 01:35:54,523 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-22 01:35:54,523 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-22 01:35:54,523 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 01:35:54,523 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 01:35:54,523 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 01:35:54,523 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 01:35:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 01:35:54,524 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 01:35:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 01:35:54,524 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 01:35:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 01:35:54,524 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 01:35:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 01:35:54,524 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 01:35:54,525 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 01:35:54,525 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 01:35:54,525 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 01:35:54,525 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 01:35:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 01:35:54,526 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 01:35:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 01:35:54,527 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 01:35:54,528 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 01:35:54,528 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 01:35:54,528 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 01:35:54,528 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 01:35:54,529 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 01:35:54,530 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 01:35:54,530 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 01:35:54,530 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 01:35:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-11-22 01:35:54,531 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-11-22 01:35:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:35:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 01:35:54,531 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 01:35:54,532 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 01:35:54,532 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 01:35:54,532 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 01:35:54,532 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 01:35:54,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:35:54,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:35:54,533 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 01:35:54,533 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 01:35:54,772 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:35:54,774 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:35:56,102 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:35:56,907 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:35:56,908 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 01:35:56,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:35:56 BoogieIcfgContainer [2022-11-22 01:35:56,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:35:56,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:35:56,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:35:56,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:35:56,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:35:53" (1/3) ... [2022-11-22 01:35:56,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b900b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:35:56, skipping insertion in model container [2022-11-22 01:35:56,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:35:54" (2/3) ... [2022-11-22 01:35:56,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b900b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:35:56, skipping insertion in model container [2022-11-22 01:35:56,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:35:56" (3/3) ... [2022-11-22 01:35:56,921 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product25.cil.c [2022-11-22 01:35:56,942 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:35:56,943 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:35:57,003 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:35:57,010 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=FINITE_AUTOMATA, 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;@49127e05, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:35:57,011 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:35:57,018 INFO L276 IsEmpty]: Start isEmpty. Operand has 338 states, 230 states have (on average 1.6217391304347826) internal successors, (373), 251 states have internal predecessors, (373), 85 states have call successors, (85), 21 states have call predecessors, (85), 21 states have return successors, (85), 79 states have call predecessors, (85), 85 states have call successors, (85) [2022-11-22 01:35:57,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-22 01:35:57,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:35:57,037 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:35:57,037 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:35:57,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:35:57,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1116336334, now seen corresponding path program 1 times [2022-11-22 01:35:57,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:35:57,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254762443] [2022-11-22 01:35:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:35:57,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:35:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:35:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:35:57,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:35:57,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254762443] [2022-11-22 01:35:57,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254762443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:35:57,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:35:57,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:35:57,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664834885] [2022-11-22 01:35:57,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:35:57,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 01:35:57,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:35:57,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 01:35:57,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 01:35:57,638 INFO L87 Difference]: Start difference. First operand has 338 states, 230 states have (on average 1.6217391304347826) internal successors, (373), 251 states have internal predecessors, (373), 85 states have call successors, (85), 21 states have call predecessors, (85), 21 states have return successors, (85), 79 states have call predecessors, (85), 85 states have call successors, (85) Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-22 01:35:57,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:35:57,866 INFO L93 Difference]: Finished difference Result 356 states and 570 transitions. [2022-11-22 01:35:57,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 01:35:57,869 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 51 [2022-11-22 01:35:57,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:35:57,886 INFO L225 Difference]: With dead ends: 356 [2022-11-22 01:35:57,887 INFO L226 Difference]: Without dead ends: 334 [2022-11-22 01:35:57,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 01:35:57,899 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:35:57,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 499 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:35:57,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-22 01:35:57,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2022-11-22 01:35:57,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 228 states have (on average 1.6096491228070176) internal successors, (367), 247 states have internal predecessors, (367), 85 states have call successors, (85), 21 states have call predecessors, (85), 20 states have return successors, (80), 78 states have call predecessors, (80), 80 states have call successors, (80) [2022-11-22 01:35:57,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 532 transitions. [2022-11-22 01:35:57,982 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 532 transitions. Word has length 51 [2022-11-22 01:35:57,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:35:57,984 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 532 transitions. [2022-11-22 01:35:57,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-22 01:35:57,985 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 532 transitions. [2022-11-22 01:35:57,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 01:35:57,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:35:57,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:35:57,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:35:57,990 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:35:57,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:35:57,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1772609343, now seen corresponding path program 1 times [2022-11-22 01:35:57,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:35:57,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467354954] [2022-11-22 01:35:57,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:35:57,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:35:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:35:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:35:58,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:35:58,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467354954] [2022-11-22 01:35:58,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467354954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:35:58,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:35:58,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:35:58,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072735343] [2022-11-22 01:35:58,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:35:58,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:35:58,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:35:58,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:35:58,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:35:58,504 INFO L87 Difference]: Start difference. First operand 334 states and 532 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-22 01:36:01,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:01,665 INFO L93 Difference]: Finished difference Result 1111 states and 1803 transitions. [2022-11-22 01:36:01,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 01:36:01,666 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 52 [2022-11-22 01:36:01,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:01,675 INFO L225 Difference]: With dead ends: 1111 [2022-11-22 01:36:01,676 INFO L226 Difference]: Without dead ends: 793 [2022-11-22 01:36:01,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:36:01,681 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 1589 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 2415 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 2415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:01,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1644 Valid, 1417 Invalid, 2905 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [490 Valid, 2415 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-22 01:36:01,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-22 01:36:01,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 755. [2022-11-22 01:36:01,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 536 states have (on average 1.6399253731343284) internal successors, (879), 571 states have internal predecessors, (879), 175 states have call successors, (175), 41 states have call predecessors, (175), 43 states have return successors, (176), 167 states have call predecessors, (176), 170 states have call successors, (176) [2022-11-22 01:36:01,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1230 transitions. [2022-11-22 01:36:01,794 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1230 transitions. Word has length 52 [2022-11-22 01:36:01,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:01,795 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1230 transitions. [2022-11-22 01:36:01,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-22 01:36:01,796 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1230 transitions. [2022-11-22 01:36:01,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-22 01:36:01,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:01,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:36:01,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:36:01,800 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:36:01,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:01,800 INFO L85 PathProgramCache]: Analyzing trace with hash -292034412, now seen corresponding path program 1 times [2022-11-22 01:36:01,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:01,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351764286] [2022-11-22 01:36:01,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:01,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:36:02,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:02,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351764286] [2022-11-22 01:36:02,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351764286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:36:02,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:36:02,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:36:02,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889292277] [2022-11-22 01:36:02,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:36:02,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:36:02,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:02,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:36:02,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:36:02,036 INFO L87 Difference]: Start difference. First operand 755 states and 1230 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 01:36:02,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:02,264 INFO L93 Difference]: Finished difference Result 1249 states and 2039 transitions. [2022-11-22 01:36:02,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:36:02,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 56 [2022-11-22 01:36:02,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:02,272 INFO L225 Difference]: With dead ends: 1249 [2022-11-22 01:36:02,272 INFO L226 Difference]: Without dead ends: 803 [2022-11-22 01:36:02,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:36:02,276 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 30 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2021 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:02,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2021 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:36:02,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-11-22 01:36:02,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 767. [2022-11-22 01:36:02,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 545 states have (on average 1.6293577981651377) internal successors, (888), 580 states have internal predecessors, (888), 175 states have call successors, (175), 41 states have call predecessors, (175), 46 states have return successors, (182), 170 states have call predecessors, (182), 170 states have call successors, (182) [2022-11-22 01:36:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1245 transitions. [2022-11-22 01:36:02,364 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1245 transitions. Word has length 56 [2022-11-22 01:36:02,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:02,365 INFO L495 AbstractCegarLoop]: Abstraction has 767 states and 1245 transitions. [2022-11-22 01:36:02,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 01:36:02,365 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1245 transitions. [2022-11-22 01:36:02,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-22 01:36:02,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:02,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:36:02,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:36:02,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:36:02,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:02,369 INFO L85 PathProgramCache]: Analyzing trace with hash 323491644, now seen corresponding path program 1 times [2022-11-22 01:36:02,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:02,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643503539] [2022-11-22 01:36:02,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:02,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:36:02,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:02,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643503539] [2022-11-22 01:36:02,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643503539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:36:02,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:36:02,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 01:36:02,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522640600] [2022-11-22 01:36:02,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:36:02,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:36:02,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:02,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:36:02,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:36:02,781 INFO L87 Difference]: Start difference. First operand 767 states and 1245 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-22 01:36:05,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:05,193 INFO L93 Difference]: Finished difference Result 1713 states and 2771 transitions. [2022-11-22 01:36:05,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:36:05,195 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 60 [2022-11-22 01:36:05,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:05,204 INFO L225 Difference]: With dead ends: 1713 [2022-11-22 01:36:05,204 INFO L226 Difference]: Without dead ends: 1159 [2022-11-22 01:36:05,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:36:05,217 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 2050 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 854 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2182 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 2873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 854 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:05,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2182 Valid, 1019 Invalid, 2873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [854 Valid, 2019 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-22 01:36:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-11-22 01:36:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1087. [2022-11-22 01:36:05,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 761 states have (on average 1.5821287779237845) internal successors, (1204), 813 states have internal predecessors, (1204), 252 states have call successors, (252), 65 states have call predecessors, (252), 73 states have return successors, (268), 245 states have call predecessors, (268), 247 states have call successors, (268) [2022-11-22 01:36:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1724 transitions. [2022-11-22 01:36:05,343 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1724 transitions. Word has length 60 [2022-11-22 01:36:05,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:05,344 INFO L495 AbstractCegarLoop]: Abstraction has 1087 states and 1724 transitions. [2022-11-22 01:36:05,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-22 01:36:05,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1724 transitions. [2022-11-22 01:36:05,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-22 01:36:05,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:05,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:36:05,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:36:05,354 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:36:05,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:05,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1760328155, now seen corresponding path program 1 times [2022-11-22 01:36:05,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:05,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924639207] [2022-11-22 01:36:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:05,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:36:05,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:05,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924639207] [2022-11-22 01:36:05,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924639207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:36:05,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:36:05,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:36:05,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751103187] [2022-11-22 01:36:05,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:36:05,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:36:05,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:05,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:36:05,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:36:05,589 INFO L87 Difference]: Start difference. First operand 1087 states and 1724 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 01:36:05,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:05,884 INFO L93 Difference]: Finished difference Result 2105 states and 3396 transitions. [2022-11-22 01:36:05,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:36:05,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2022-11-22 01:36:05,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:05,893 INFO L225 Difference]: With dead ends: 2105 [2022-11-22 01:36:05,894 INFO L226 Difference]: Without dead ends: 1087 [2022-11-22 01:36:05,899 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 [2022-11-22 01:36:05,904 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 210 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:05,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1338 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:36:05,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2022-11-22 01:36:05,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 1087. [2022-11-22 01:36:05,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 761 states have (on average 1.540078843626807) internal successors, (1172), 813 states have internal predecessors, (1172), 252 states have call successors, (252), 65 states have call predecessors, (252), 73 states have return successors, (268), 245 states have call predecessors, (268), 247 states have call successors, (268) [2022-11-22 01:36:05,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1692 transitions. [2022-11-22 01:36:05,997 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1692 transitions. Word has length 63 [2022-11-22 01:36:05,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:05,997 INFO L495 AbstractCegarLoop]: Abstraction has 1087 states and 1692 transitions. [2022-11-22 01:36:05,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 01:36:05,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1692 transitions. [2022-11-22 01:36:05,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-22 01:36:06,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:06,000 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] [2022-11-22 01:36:06,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:36:06,000 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:36:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:06,001 INFO L85 PathProgramCache]: Analyzing trace with hash -670883309, now seen corresponding path program 1 times [2022-11-22 01:36:06,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:06,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987664165] [2022-11-22 01:36:06,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:06,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:36:06,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:06,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987664165] [2022-11-22 01:36:06,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987664165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:36:06,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:36:06,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:36:06,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231864546] [2022-11-22 01:36:06,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:36:06,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:36:06,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:06,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:36:06,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:36:06,449 INFO L87 Difference]: Start difference. First operand 1087 states and 1692 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-22 01:36:08,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:08,504 INFO L93 Difference]: Finished difference Result 2037 states and 3179 transitions. [2022-11-22 01:36:08,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 01:36:08,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 65 [2022-11-22 01:36:08,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:08,513 INFO L225 Difference]: With dead ends: 2037 [2022-11-22 01:36:08,513 INFO L226 Difference]: Without dead ends: 1220 [2022-11-22 01:36:08,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:36:08,518 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 880 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 2208 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 2208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:08,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [942 Valid, 1276 Invalid, 2562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 2208 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-22 01:36:08,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2022-11-22 01:36:08,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1114. [2022-11-22 01:36:08,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 779 states have (on average 1.532734274711168) internal successors, (1194), 835 states have internal predecessors, (1194), 253 states have call successors, (253), 70 states have call predecessors, (253), 81 states have return successors, (279), 245 states have call predecessors, (279), 248 states have call successors, (279) [2022-11-22 01:36:08,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1726 transitions. [2022-11-22 01:36:08,608 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1726 transitions. Word has length 65 [2022-11-22 01:36:08,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:08,610 INFO L495 AbstractCegarLoop]: Abstraction has 1114 states and 1726 transitions. [2022-11-22 01:36:08,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-22 01:36:08,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1726 transitions. [2022-11-22 01:36:08,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-22 01:36:08,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:08,613 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:36:08,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:36:08,614 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:36:08,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:08,614 INFO L85 PathProgramCache]: Analyzing trace with hash 433843279, now seen corresponding path program 1 times [2022-11-22 01:36:08,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:08,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574016238] [2022-11-22 01:36:08,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:08,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:36:08,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:08,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574016238] [2022-11-22 01:36:08,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574016238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:36:08,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:36:08,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:36:08,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697639592] [2022-11-22 01:36:08,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:36:08,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:36:08,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:08,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:36:08,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:36:08,885 INFO L87 Difference]: Start difference. First operand 1114 states and 1726 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 01:36:09,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:09,445 INFO L93 Difference]: Finished difference Result 1186 states and 1839 transitions. [2022-11-22 01:36:09,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:36:09,446 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 69 [2022-11-22 01:36:09,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:09,454 INFO L225 Difference]: With dead ends: 1186 [2022-11-22 01:36:09,454 INFO L226 Difference]: Without dead ends: 1171 [2022-11-22 01:36:09,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:36:09,456 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 616 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:09,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 1287 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:36:09,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-11-22 01:36:09,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1118. [2022-11-22 01:36:09,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 783 states have (on average 1.5300127713920817) internal successors, (1198), 839 states have internal predecessors, (1198), 253 states have call successors, (253), 70 states have call predecessors, (253), 81 states have return successors, (279), 245 states have call predecessors, (279), 248 states have call successors, (279) [2022-11-22 01:36:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1730 transitions. [2022-11-22 01:36:09,540 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1730 transitions. Word has length 69 [2022-11-22 01:36:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:09,541 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 1730 transitions. [2022-11-22 01:36:09,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 01:36:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1730 transitions. [2022-11-22 01:36:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-22 01:36:09,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:09,543 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-11-22 01:36:09,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:36:09,543 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:36:09,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:09,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1208809672, now seen corresponding path program 1 times [2022-11-22 01:36:09,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:09,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79806830] [2022-11-22 01:36:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:09,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:36:09,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:09,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79806830] [2022-11-22 01:36:09,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79806830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:36:09,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:36:09,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:36:09,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019470401] [2022-11-22 01:36:09,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:36:09,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:36:09,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:09,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:36:09,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:36:09,786 INFO L87 Difference]: Start difference. First operand 1118 states and 1730 transitions. Second operand has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 01:36:10,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:10,103 INFO L93 Difference]: Finished difference Result 1137 states and 1754 transitions. [2022-11-22 01:36:10,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:36:10,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 74 [2022-11-22 01:36:10,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:10,112 INFO L225 Difference]: With dead ends: 1137 [2022-11-22 01:36:10,112 INFO L226 Difference]: Without dead ends: 1122 [2022-11-22 01:36:10,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:36:10,115 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 257 mSDsluCounter, 2099 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2574 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:10,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 2574 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:36:10,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-11-22 01:36:10,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1118. [2022-11-22 01:36:10,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 783 states have (on average 1.5261813537675606) internal successors, (1195), 839 states have internal predecessors, (1195), 253 states have call successors, (253), 70 states have call predecessors, (253), 81 states have return successors, (279), 245 states have call predecessors, (279), 248 states have call successors, (279) [2022-11-22 01:36:10,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1727 transitions. [2022-11-22 01:36:10,256 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1727 transitions. Word has length 74 [2022-11-22 01:36:10,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:10,256 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 1727 transitions. [2022-11-22 01:36:10,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 01:36:10,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1727 transitions. [2022-11-22 01:36:10,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-22 01:36:10,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:10,265 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 01:36:10,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:36:10,265 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:36:10,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:10,266 INFO L85 PathProgramCache]: Analyzing trace with hash -687954906, now seen corresponding path program 1 times [2022-11-22 01:36:10,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:10,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50516893] [2022-11-22 01:36:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:10,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:36:10,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:10,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50516893] [2022-11-22 01:36:10,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50516893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:36:10,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:36:10,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:36:10,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176218956] [2022-11-22 01:36:10,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:36:10,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:36:10,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:10,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:36:10,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:36:10,394 INFO L87 Difference]: Start difference. First operand 1118 states and 1727 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 01:36:10,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:10,661 INFO L93 Difference]: Finished difference Result 3277 states and 5104 transitions. [2022-11-22 01:36:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:36:10,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 81 [2022-11-22 01:36:10,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:10,679 INFO L225 Difference]: With dead ends: 3277 [2022-11-22 01:36:10,679 INFO L226 Difference]: Without dead ends: 2175 [2022-11-22 01:36:10,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:36:10,687 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 477 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:10,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 1058 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:36:10,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2022-11-22 01:36:10,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 2134. [2022-11-22 01:36:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2134 states, 1523 states have (on average 1.5344714379514117) internal successors, (2337), 1631 states have internal predecessors, (2337), 457 states have call successors, (457), 129 states have call predecessors, (457), 153 states have return successors, (526), 429 states have call predecessors, (526), 452 states have call successors, (526) [2022-11-22 01:36:10,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2134 states to 2134 states and 3320 transitions. [2022-11-22 01:36:10,961 INFO L78 Accepts]: Start accepts. Automaton has 2134 states and 3320 transitions. Word has length 81 [2022-11-22 01:36:10,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:10,962 INFO L495 AbstractCegarLoop]: Abstraction has 2134 states and 3320 transitions. [2022-11-22 01:36:10,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 01:36:10,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2134 states and 3320 transitions. [2022-11-22 01:36:10,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-22 01:36:10,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:10,966 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 01:36:10,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:36:10,967 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:36:10,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:10,967 INFO L85 PathProgramCache]: Analyzing trace with hash 147821623, now seen corresponding path program 1 times [2022-11-22 01:36:10,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:10,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681364127] [2022-11-22 01:36:10,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:10,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:36:11,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:11,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681364127] [2022-11-22 01:36:11,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681364127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:36:11,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:36:11,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:36:11,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528931395] [2022-11-22 01:36:11,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:36:11,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:36:11,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:11,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:36:11,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:36:11,114 INFO L87 Difference]: Start difference. First operand 2134 states and 3320 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 01:36:11,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:11,567 INFO L93 Difference]: Finished difference Result 6324 states and 9926 transitions. [2022-11-22 01:36:11,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:36:11,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2022-11-22 01:36:11,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:11,598 INFO L225 Difference]: With dead ends: 6324 [2022-11-22 01:36:11,598 INFO L226 Difference]: Without dead ends: 4209 [2022-11-22 01:36:11,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:36:11,609 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 476 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:11,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 1064 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:36:11,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4209 states. [2022-11-22 01:36:11,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4209 to 4167. [2022-11-22 01:36:11,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4167 states, 3004 states have (on average 1.5369507323568574) internal successors, (4617), 3216 states have internal predecessors, (4617), 865 states have call successors, (865), 247 states have call predecessors, (865), 297 states have return successors, (1048), 797 states have call predecessors, (1048), 860 states have call successors, (1048) [2022-11-22 01:36:11,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4167 states to 4167 states and 6530 transitions. [2022-11-22 01:36:11,959 INFO L78 Accepts]: Start accepts. Automaton has 4167 states and 6530 transitions. Word has length 82 [2022-11-22 01:36:11,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:11,960 INFO L495 AbstractCegarLoop]: Abstraction has 4167 states and 6530 transitions. [2022-11-22 01:36:11,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 01:36:11,961 INFO L276 IsEmpty]: Start isEmpty. Operand 4167 states and 6530 transitions. [2022-11-22 01:36:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-22 01:36:11,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:11,964 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:36:11,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 01:36:11,965 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:36:11,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:11,966 INFO L85 PathProgramCache]: Analyzing trace with hash -413319349, now seen corresponding path program 1 times [2022-11-22 01:36:11,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:11,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072412527] [2022-11-22 01:36:11,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:11,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:36:12,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:12,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072412527] [2022-11-22 01:36:12,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072412527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:36:12,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:36:12,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:36:12,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102877150] [2022-11-22 01:36:12,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:36:12,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:36:12,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:12,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:36:12,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:36:12,140 INFO L87 Difference]: Start difference. First operand 4167 states and 6530 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-22 01:36:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:12,858 INFO L93 Difference]: Finished difference Result 12419 states and 19701 transitions. [2022-11-22 01:36:12,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:36:12,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 86 [2022-11-22 01:36:12,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:12,926 INFO L225 Difference]: With dead ends: 12419 [2022-11-22 01:36:12,926 INFO L226 Difference]: Without dead ends: 8277 [2022-11-22 01:36:12,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:36:12,948 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 475 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:12,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 1070 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:36:12,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2022-11-22 01:36:13,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 8234. [2022-11-22 01:36:13,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8234 states, 5967 states have (on average 1.5362828892240656) internal successors, (9167), 6387 states have internal predecessors, (9167), 1681 states have call successors, (1681), 483 states have call predecessors, (1681), 585 states have return successors, (2194), 1533 states have call predecessors, (2194), 1676 states have call successors, (2194) [2022-11-22 01:36:13,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8234 states to 8234 states and 13042 transitions. [2022-11-22 01:36:13,773 INFO L78 Accepts]: Start accepts. Automaton has 8234 states and 13042 transitions. Word has length 86 [2022-11-22 01:36:13,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:13,773 INFO L495 AbstractCegarLoop]: Abstraction has 8234 states and 13042 transitions. [2022-11-22 01:36:13,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-22 01:36:13,774 INFO L276 IsEmpty]: Start isEmpty. Operand 8234 states and 13042 transitions. [2022-11-22 01:36:13,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-22 01:36:13,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:13,776 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 01:36:13,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 01:36:13,777 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:36:13,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:13,778 INFO L85 PathProgramCache]: Analyzing trace with hash 309579161, now seen corresponding path program 1 times [2022-11-22 01:36:13,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:13,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244770109] [2022-11-22 01:36:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:13,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:36:13,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:13,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244770109] [2022-11-22 01:36:13,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244770109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:36:13,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:36:13,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:36:13,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605095176] [2022-11-22 01:36:13,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:36:13,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:36:13,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:13,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:36:13,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:36:13,904 INFO L87 Difference]: Start difference. First operand 8234 states and 13042 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 01:36:15,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:15,327 INFO L93 Difference]: Finished difference Result 24610 states and 39746 transitions. [2022-11-22 01:36:15,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:36:15,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 84 [2022-11-22 01:36:15,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:15,453 INFO L225 Difference]: With dead ends: 24610 [2022-11-22 01:36:15,453 INFO L226 Difference]: Without dead ends: 16413 [2022-11-22 01:36:15,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:36:15,494 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 474 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:15,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 1076 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:36:15,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16413 states. [2022-11-22 01:36:17,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16413 to 16369. [2022-11-22 01:36:17,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16369 states, 11894 states have (on average 1.5339667059021356) internal successors, (18245), 12730 states have internal predecessors, (18245), 3313 states have call successors, (3313), 955 states have call predecessors, (3313), 1161 states have return successors, (4864), 3005 states have call predecessors, (4864), 3308 states have call successors, (4864) [2022-11-22 01:36:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16369 states to 16369 states and 26422 transitions. [2022-11-22 01:36:17,444 INFO L78 Accepts]: Start accepts. Automaton has 16369 states and 26422 transitions. Word has length 84 [2022-11-22 01:36:17,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:17,445 INFO L495 AbstractCegarLoop]: Abstraction has 16369 states and 26422 transitions. [2022-11-22 01:36:17,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 01:36:17,446 INFO L276 IsEmpty]: Start isEmpty. Operand 16369 states and 26422 transitions. [2022-11-22 01:36:17,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-22 01:36:17,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:17,449 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 01:36:17,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 01:36:17,449 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:36:17,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:17,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1006618346, now seen corresponding path program 1 times [2022-11-22 01:36:17,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:17,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314405861] [2022-11-22 01:36:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:17,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:17,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:36:17,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:17,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314405861] [2022-11-22 01:36:17,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314405861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:36:17,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:36:17,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:36:17,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139538187] [2022-11-22 01:36:17,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:36:17,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:36:17,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:17,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:36:17,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:36:17,592 INFO L87 Difference]: Start difference. First operand 16369 states and 26422 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 01:36:18,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:18,881 INFO L93 Difference]: Finished difference Result 17431 states and 28225 transitions. [2022-11-22 01:36:18,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:36:18,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 85 [2022-11-22 01:36:18,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:19,163 INFO L225 Difference]: With dead ends: 17431 [2022-11-22 01:36:19,166 INFO L226 Difference]: Without dead ends: 17420 [2022-11-22 01:36:19,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:36:19,174 INFO L413 NwaCegarLoop]: 595 mSDtfsCounter, 460 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:19,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 1074 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:36:19,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17420 states. [2022-11-22 01:36:20,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17420 to 17377. [2022-11-22 01:36:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17377 states, 12627 states have (on average 1.5329056783083868) internal successors, (19356), 13515 states have internal predecessors, (19356), 3517 states have call successors, (3517), 1014 states have call predecessors, (3517), 1232 states have return successors, (5275), 3188 states have call predecessors, (5275), 3512 states have call successors, (5275) [2022-11-22 01:36:21,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17377 states to 17377 states and 28148 transitions. [2022-11-22 01:36:21,259 INFO L78 Accepts]: Start accepts. Automaton has 17377 states and 28148 transitions. Word has length 85 [2022-11-22 01:36:21,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:21,260 INFO L495 AbstractCegarLoop]: Abstraction has 17377 states and 28148 transitions. [2022-11-22 01:36:21,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 01:36:21,260 INFO L276 IsEmpty]: Start isEmpty. Operand 17377 states and 28148 transitions. [2022-11-22 01:36:21,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-22 01:36:21,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:21,266 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:36:21,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 01:36:21,267 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:36:21,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:21,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1683573582, now seen corresponding path program 1 times [2022-11-22 01:36:21,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:21,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523346117] [2022-11-22 01:36:21,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:21,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-22 01:36:21,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:21,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523346117] [2022-11-22 01:36:21,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523346117] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:36:21,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66097045] [2022-11-22 01:36:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:21,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:36:21,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:36:21,490 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:36:21,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:36:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:21,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 1825 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:36:21,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:36:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 01:36:22,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:36:22,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66097045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:36:22,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:36:22,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 01:36:22,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257929556] [2022-11-22 01:36:22,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:36:22,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:36:22,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:22,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:36:22,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:36:22,030 INFO L87 Difference]: Start difference. First operand 17377 states and 28148 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-22 01:36:23,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:23,768 INFO L93 Difference]: Finished difference Result 36726 states and 61123 transitions. [2022-11-22 01:36:23,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:36:23,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 132 [2022-11-22 01:36:23,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:23,881 INFO L225 Difference]: With dead ends: 36726 [2022-11-22 01:36:23,881 INFO L226 Difference]: Without dead ends: 19366 [2022-11-22 01:36:23,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:36:23,955 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 213 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:23,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1233 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:36:23,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19366 states. [2022-11-22 01:36:25,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19366 to 19366. [2022-11-22 01:36:25,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19366 states, 14565 states have (on average 1.5845520082389288) internal successors, (23079), 15453 states have internal predecessors, (23079), 3517 states have call successors, (3517), 1065 states have call predecessors, (3517), 1283 states have return successors, (5275), 3188 states have call predecessors, (5275), 3512 states have call successors, (5275) [2022-11-22 01:36:25,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19366 states to 19366 states and 31871 transitions. [2022-11-22 01:36:25,609 INFO L78 Accepts]: Start accepts. Automaton has 19366 states and 31871 transitions. Word has length 132 [2022-11-22 01:36:25,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:25,610 INFO L495 AbstractCegarLoop]: Abstraction has 19366 states and 31871 transitions. [2022-11-22 01:36:25,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-22 01:36:25,610 INFO L276 IsEmpty]: Start isEmpty. Operand 19366 states and 31871 transitions. [2022-11-22 01:36:25,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-22 01:36:25,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:25,618 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:36:25,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:36:25,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:36:25,826 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:36:25,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:25,827 INFO L85 PathProgramCache]: Analyzing trace with hash 435374254, now seen corresponding path program 1 times [2022-11-22 01:36:25,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:25,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724851617] [2022-11-22 01:36:25,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:25,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-22 01:36:27,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:27,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724851617] [2022-11-22 01:36:27,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724851617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:36:27,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341492069] [2022-11-22 01:36:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:27,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:36:27,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:36:27,427 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:36:27,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:36:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:27,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 1830 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:36:27,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:36:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 01:36:27,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:36:27,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341492069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:36:27,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:36:27,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-22 01:36:27,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830223582] [2022-11-22 01:36:27,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:36:27,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:36:27,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:27,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:36:27,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-22 01:36:27,942 INFO L87 Difference]: Start difference. First operand 19366 states and 31871 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-22 01:36:29,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:29,339 INFO L93 Difference]: Finished difference Result 40704 states and 68518 transitions. [2022-11-22 01:36:29,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:36:29,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 137 [2022-11-22 01:36:29,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:29,444 INFO L225 Difference]: With dead ends: 40704 [2022-11-22 01:36:29,444 INFO L226 Difference]: Without dead ends: 21355 [2022-11-22 01:36:29,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:36:29,505 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 211 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:29,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1233 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:36:29,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21355 states. [2022-11-22 01:36:30,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21355 to 21355. [2022-11-22 01:36:30,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21355 states, 16503 states have (on average 1.6240683512088712) internal successors, (26802), 17391 states have internal predecessors, (26802), 3517 states have call successors, (3517), 1116 states have call predecessors, (3517), 1334 states have return successors, (5275), 3188 states have call predecessors, (5275), 3512 states have call successors, (5275) [2022-11-22 01:36:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21355 states to 21355 states and 35594 transitions. [2022-11-22 01:36:30,986 INFO L78 Accepts]: Start accepts. Automaton has 21355 states and 35594 transitions. Word has length 137 [2022-11-22 01:36:30,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:30,990 INFO L495 AbstractCegarLoop]: Abstraction has 21355 states and 35594 transitions. [2022-11-22 01:36:30,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-22 01:36:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 21355 states and 35594 transitions. [2022-11-22 01:36:31,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-22 01:36:31,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:31,002 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:36:31,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:36:31,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 01:36:31,211 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:36:31,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:31,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1538670462, now seen corresponding path program 1 times [2022-11-22 01:36:31,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:31,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435924519] [2022-11-22 01:36:31,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:31,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-22 01:36:32,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:32,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435924519] [2022-11-22 01:36:32,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435924519] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:36:32,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431500653] [2022-11-22 01:36:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:32,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:36:32,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:36:32,843 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:36:32,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:36:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:33,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 1834 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:36:33,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:36:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 01:36:33,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:36:33,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431500653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:36:33,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:36:33,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-22 01:36:33,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630701563] [2022-11-22 01:36:33,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:36:33,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:36:33,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:33,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:36:33,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-22 01:36:33,338 INFO L87 Difference]: Start difference. First operand 21355 states and 35594 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-22 01:36:34,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:34,664 INFO L93 Difference]: Finished difference Result 44682 states and 75913 transitions. [2022-11-22 01:36:34,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:36:34,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 141 [2022-11-22 01:36:34,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:34,912 INFO L225 Difference]: With dead ends: 44682 [2022-11-22 01:36:34,913 INFO L226 Difference]: Without dead ends: 23344 [2022-11-22 01:36:34,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:36:34,972 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 209 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:34,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1233 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:36:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23344 states. [2022-11-22 01:36:36,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23344 to 23344. [2022-11-22 01:36:36,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23344 states, 18441 states have (on average 1.6552789978851472) internal successors, (30525), 19329 states have internal predecessors, (30525), 3517 states have call successors, (3517), 1167 states have call predecessors, (3517), 1385 states have return successors, (5275), 3188 states have call predecessors, (5275), 3512 states have call successors, (5275) [2022-11-22 01:36:36,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23344 states to 23344 states and 39317 transitions. [2022-11-22 01:36:36,629 INFO L78 Accepts]: Start accepts. Automaton has 23344 states and 39317 transitions. Word has length 141 [2022-11-22 01:36:36,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:36,630 INFO L495 AbstractCegarLoop]: Abstraction has 23344 states and 39317 transitions. [2022-11-22 01:36:36,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-22 01:36:36,631 INFO L276 IsEmpty]: Start isEmpty. Operand 23344 states and 39317 transitions. [2022-11-22 01:36:36,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-22 01:36:36,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:36,640 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:36:36,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:36:36,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 01:36:36,849 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:36:36,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:36,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1333081480, now seen corresponding path program 1 times [2022-11-22 01:36:36,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:36,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260034286] [2022-11-22 01:36:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:36,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-22 01:36:38,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:38,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260034286] [2022-11-22 01:36:38,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260034286] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:36:38,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016264093] [2022-11-22 01:36:38,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:38,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:36:38,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:36:38,243 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:36:38,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:36:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:38,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:36:38,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:36:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-22 01:36:38,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:36:38,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016264093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:36:38,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:36:38,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-22 01:36:38,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457075059] [2022-11-22 01:36:38,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:36:38,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:36:38,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:38,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:36:38,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-22 01:36:38,833 INFO L87 Difference]: Start difference. First operand 23344 states and 39317 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-22 01:36:40,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:40,369 INFO L93 Difference]: Finished difference Result 48660 states and 83308 transitions. [2022-11-22 01:36:40,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:36:40,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 144 [2022-11-22 01:36:40,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:40,483 INFO L225 Difference]: With dead ends: 48660 [2022-11-22 01:36:40,484 INFO L226 Difference]: Without dead ends: 25333 [2022-11-22 01:36:40,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:36:40,546 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 207 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:40,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1233 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:36:40,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25333 states. [2022-11-22 01:36:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25333 to 25333. [2022-11-22 01:36:41,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25333 states, 20379 states have (on average 1.680553510967172) internal successors, (34248), 21267 states have internal predecessors, (34248), 3517 states have call successors, (3517), 1218 states have call predecessors, (3517), 1436 states have return successors, (5275), 3188 states have call predecessors, (5275), 3512 states have call successors, (5275) [2022-11-22 01:36:42,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25333 states to 25333 states and 43040 transitions. [2022-11-22 01:36:42,012 INFO L78 Accepts]: Start accepts. Automaton has 25333 states and 43040 transitions. Word has length 144 [2022-11-22 01:36:42,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:42,013 INFO L495 AbstractCegarLoop]: Abstraction has 25333 states and 43040 transitions. [2022-11-22 01:36:42,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-22 01:36:42,013 INFO L276 IsEmpty]: Start isEmpty. Operand 25333 states and 43040 transitions. [2022-11-22 01:36:42,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-22 01:36:42,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:42,024 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:36:42,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:36:42,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 01:36:42,232 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:36:42,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:42,233 INFO L85 PathProgramCache]: Analyzing trace with hash 593862298, now seen corresponding path program 1 times [2022-11-22 01:36:42,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:42,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339268236] [2022-11-22 01:36:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:42,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-22 01:36:43,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:43,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339268236] [2022-11-22 01:36:43,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339268236] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:36:43,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875794800] [2022-11-22 01:36:43,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:43,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:36:43,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:36:43,695 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:36:43,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:36:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:44,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:36:44,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:36:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-22 01:36:44,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:36:44,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875794800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:36:44,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:36:44,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-22 01:36:44,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880338605] [2022-11-22 01:36:44,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:36:44,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:36:44,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:44,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:36:44,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-22 01:36:44,331 INFO L87 Difference]: Start difference. First operand 25333 states and 43040 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-22 01:36:45,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:45,628 INFO L93 Difference]: Finished difference Result 52260 states and 89629 transitions. [2022-11-22 01:36:45,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:36:45,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 146 [2022-11-22 01:36:45,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:45,761 INFO L225 Difference]: With dead ends: 52260 [2022-11-22 01:36:45,761 INFO L226 Difference]: Without dead ends: 26989 [2022-11-22 01:36:45,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:36:45,826 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 289 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:45,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 1335 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:36:45,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26989 states. [2022-11-22 01:36:47,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26989 to 26835. [2022-11-22 01:36:47,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26835 states, 21453 states have (on average 1.666014077285228) internal successors, (35741), 22344 states have internal predecessors, (35741), 3806 states have call successors, (3806), 1371 states have call predecessors, (3806), 1575 states have return successors, (6702), 3443 states have call predecessors, (6702), 3801 states have call successors, (6702) [2022-11-22 01:36:47,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26835 states to 26835 states and 46249 transitions. [2022-11-22 01:36:47,143 INFO L78 Accepts]: Start accepts. Automaton has 26835 states and 46249 transitions. Word has length 146 [2022-11-22 01:36:47,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:47,143 INFO L495 AbstractCegarLoop]: Abstraction has 26835 states and 46249 transitions. [2022-11-22 01:36:47,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-22 01:36:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 26835 states and 46249 transitions. [2022-11-22 01:36:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-22 01:36:47,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:47,152 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:36:47,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:36:47,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:36:47,361 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:36:47,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:47,361 INFO L85 PathProgramCache]: Analyzing trace with hash 453761676, now seen corresponding path program 1 times [2022-11-22 01:36:47,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:47,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730180580] [2022-11-22 01:36:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:47,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:47,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:48,843 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-22 01:36:48,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:48,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730180580] [2022-11-22 01:36:48,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730180580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:36:48,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794042666] [2022-11-22 01:36:48,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:48,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:36:48,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:36:48,846 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:36:48,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:36:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:49,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:36:49,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:36:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-22 01:36:49,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:36:49,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794042666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:36:49,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:36:49,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [18] total 23 [2022-11-22 01:36:49,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358815022] [2022-11-22 01:36:49,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:36:49,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:36:49,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:49,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:36:49,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-11-22 01:36:49,649 INFO L87 Difference]: Start difference. First operand 26835 states and 46249 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 6 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 6 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-22 01:36:54,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:54,266 INFO L93 Difference]: Finished difference Result 63576 states and 111078 transitions. [2022-11-22 01:36:54,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:36:54,267 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 6 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 6 states have call predecessors, (22), 5 states have call successors, (22) Word has length 149 [2022-11-22 01:36:54,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:54,377 INFO L225 Difference]: With dead ends: 63576 [2022-11-22 01:36:54,377 INFO L226 Difference]: Without dead ends: 36764 [2022-11-22 01:36:54,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-11-22 01:36:54,444 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 1051 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 3022 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 3463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 3022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:54,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1161 Valid, 1307 Invalid, 3463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 3022 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-22 01:36:54,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36764 states. [2022-11-22 01:36:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36764 to 34500. [2022-11-22 01:36:56,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34500 states, 27677 states have (on average 1.6617769266900315) internal successors, (45993), 28867 states have internal predecessors, (45993), 4742 states have call successors, (4742), 1820 states have call predecessors, (4742), 2080 states have return successors, (7467), 4268 states have call predecessors, (7467), 4737 states have call successors, (7467) [2022-11-22 01:36:56,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34500 states to 34500 states and 58202 transitions. [2022-11-22 01:36:56,233 INFO L78 Accepts]: Start accepts. Automaton has 34500 states and 58202 transitions. Word has length 149 [2022-11-22 01:36:56,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:56,234 INFO L495 AbstractCegarLoop]: Abstraction has 34500 states and 58202 transitions. [2022-11-22 01:36:56,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 6 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 6 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-22 01:36:56,234 INFO L276 IsEmpty]: Start isEmpty. Operand 34500 states and 58202 transitions. [2022-11-22 01:36:56,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-22 01:36:56,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:56,241 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:36:56,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:36:56,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:36:56,449 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:36:56,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:56,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1960668456, now seen corresponding path program 1 times [2022-11-22 01:36:56,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:56,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202643021] [2022-11-22 01:36:56,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:56,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-22 01:36:57,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:57,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202643021] [2022-11-22 01:36:57,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202643021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:36:57,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093362784] [2022-11-22 01:36:57,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:57,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:36:57,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:36:57,672 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:36:57,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:36:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:58,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:36:58,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:36:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-22 01:36:58,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:36:58,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093362784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:36:58,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:36:58,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-22 01:36:58,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493287247] [2022-11-22 01:36:58,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:36:58,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:36:58,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:58,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:36:58,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-22 01:36:58,110 INFO L87 Difference]: Start difference. First operand 34500 states and 58202 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-11-22 01:37:00,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:00,020 INFO L93 Difference]: Finished difference Result 35385 states and 61385 transitions. [2022-11-22 01:37:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:37:00,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 149 [2022-11-22 01:37:00,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:00,190 INFO L225 Difference]: With dead ends: 35385 [2022-11-22 01:37:00,190 INFO L226 Difference]: Without dead ends: 35299 [2022-11-22 01:37:00,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:37:00,216 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 44 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:00,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1512 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:37:00,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35299 states. [2022-11-22 01:37:01,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35299 to 34632. [2022-11-22 01:37:01,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34632 states, 27809 states have (on average 1.658635693480528) internal successors, (46125), 28999 states have internal predecessors, (46125), 4742 states have call successors, (4742), 1820 states have call predecessors, (4742), 2080 states have return successors, (7467), 4268 states have call predecessors, (7467), 4737 states have call successors, (7467) [2022-11-22 01:37:01,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34632 states to 34632 states and 58334 transitions. [2022-11-22 01:37:01,978 INFO L78 Accepts]: Start accepts. Automaton has 34632 states and 58334 transitions. Word has length 149 [2022-11-22 01:37:01,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:01,978 INFO L495 AbstractCegarLoop]: Abstraction has 34632 states and 58334 transitions. [2022-11-22 01:37:01,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-11-22 01:37:01,979 INFO L276 IsEmpty]: Start isEmpty. Operand 34632 states and 58334 transitions. [2022-11-22 01:37:01,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-22 01:37:01,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:01,988 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:37:02,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:37:02,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:02,195 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:37:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:02,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1522840532, now seen corresponding path program 1 times [2022-11-22 01:37:02,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:37:02,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077719500] [2022-11-22 01:37:02,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:02,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:37:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-22 01:37:03,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:37:03,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077719500] [2022-11-22 01:37:03,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077719500] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:37:03,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265924072] [2022-11-22 01:37:03,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:03,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:03,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:37:03,486 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:37:03,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b342aa67-446f-4c0b-b212-d4d3ee35eb10/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:37:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:03,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-22 01:37:03,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-22 01:37:05,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:37:08,658 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-22 01:37:17,492 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-11-22 01:37:17,949 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time...