./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_c548e33a-f3cd-4c06-94aa-0b67649225e1/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 34aba2e0444cf7168338399e1c016871ad9a3305ff2dee9e611b86f3cad834b5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:22:22,571 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:22:22,691 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:22:22,705 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:22:22,706 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:22:22,754 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:22:22,758 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:22:22,759 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:22:22,760 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:22:22,765 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:22:22,766 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:22:22,767 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:22:22,768 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:22:22,770 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:22:22,770 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:22:22,771 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:22:22,772 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:22:22,772 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:22:22,773 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:22:22,773 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:22:22,774 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:22:22,774 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:22:22,776 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:22:22,776 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:22:22,777 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:22:22,777 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:22:22,778 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:22:22,778 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:22:22,779 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:22:22,779 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:22:22,781 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:22:22,781 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:22:22,781 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:22:22,781 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:22:22,782 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:22:22,782 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:22:22,783 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:22:22,783 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:22:22,784 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:22:22,784 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:22:22,784 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:22:22,785 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:22:22,785 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:22:22,785 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:22:22,786 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:22:22,786 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:22:22,786 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:22:22,787 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_c548e33a-f3cd-4c06-94aa-0b67649225e1/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34aba2e0444cf7168338399e1c016871ad9a3305ff2dee9e611b86f3cad834b5 [2023-11-24 23:22:23,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:22:23,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:22:23,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:22:23,131 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:22:23,131 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:22:23,133 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-11-24 23:22:26,214 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:22:26,560 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:22:26,561 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-11-24 23:22:26,586 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/bin/utaipan-verify-SwPr7d2a91/data/645862937/5ced103b99914c90942e6482dd39f492/FLAG927859ee5 [2023-11-24 23:22:26,609 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/bin/utaipan-verify-SwPr7d2a91/data/645862937/5ced103b99914c90942e6482dd39f492 [2023-11-24 23:22:26,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:22:26,613 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:22:26,614 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:22:26,615 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:22:26,621 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:22:26,623 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:22:26" (1/1) ... [2023-11-24 23:22:26,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e4ed741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:22:26, skipping insertion in model container [2023-11-24 23:22:26,624 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:22:26" (1/1) ... [2023-11-24 23:22:26,733 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:22:27,026 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[8127,8140] [2023-11-24 23:22:27,092 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[14997,15010] [2023-11-24 23:22:27,108 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[17084,17097] [2023-11-24 23:22:27,118 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18108,18121] [2023-11-24 23:22:27,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:22:27,463 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:22:27,557 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[8127,8140] [2023-11-24 23:22:27,619 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[14997,15010] [2023-11-24 23:22:27,633 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[17084,17097] [2023-11-24 23:22:27,651 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18108,18121] [2023-11-24 23:22:27,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:22:27,853 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:22:27,853 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:22:27 WrapperNode [2023-11-24 23:22:27,853 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:22:27,855 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:22:27,855 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:22:27,855 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:22:27,864 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:22:27" (1/1) ... [2023-11-24 23:22:27,897 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:22:27" (1/1) ... [2023-11-24 23:22:28,001 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2614 [2023-11-24 23:22:28,001 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:22:28,002 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:22:28,002 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:22:28,002 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:22:28,015 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:22:27" (1/1) ... [2023-11-24 23:22:28,015 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:22:27" (1/1) ... [2023-11-24 23:22:28,025 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:22:27" (1/1) ... [2023-11-24 23:22:28,026 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:22:27" (1/1) ... [2023-11-24 23:22:28,067 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:22:27" (1/1) ... [2023-11-24 23:22:28,085 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:22:27" (1/1) ... [2023-11-24 23:22:28,097 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:22:27" (1/1) ... [2023-11-24 23:22:28,109 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:22:27" (1/1) ... [2023-11-24 23:22:28,132 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:22:28,133 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:22:28,133 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:22:28,134 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:22:28,134 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:22:27" (1/1) ... [2023-11-24 23:22:28,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:22:28,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:22:28,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:22:28,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:22:28,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:22:28,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:22:28,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:22:28,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:22:28,490 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:22:28,493 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:22:30,345 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:22:30,538 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:22:30,539 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 23:22:30,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:22:30 BoogieIcfgContainer [2023-11-24 23:22:30,541 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:22:30,546 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:22:30,546 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:22:30,550 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:22:30,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:22:26" (1/3) ... [2023-11-24 23:22:30,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eb9b36d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:22:30, skipping insertion in model container [2023-11-24 23:22:30,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:22:27" (2/3) ... [2023-11-24 23:22:30,554 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eb9b36d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:22:30, skipping insertion in model container [2023-11-24 23:22:30,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:22:30" (3/3) ... [2023-11-24 23:22:30,557 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-11-24 23:22:30,579 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:22:30,579 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-24 23:22:30,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:22:30,677 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=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33582c18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:22:30,677 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-24 23:22:30,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 426 states, 421 states have (on average 1.8598574821852731) internal successors, (783), 425 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:30,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-24 23:22:30,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:30,706 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] [2023-11-24 23:22:30,707 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:30,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:30,712 INFO L85 PathProgramCache]: Analyzing trace with hash 34120099, now seen corresponding path program 1 times [2023-11-24 23:22:30,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:30,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005907743] [2023-11-24 23:22:30,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:30,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:31,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:31,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005907743] [2023-11-24 23:22:31,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005907743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:31,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:31,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:22:31,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960079914] [2023-11-24 23:22:31,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:31,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:22:31,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:31,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:22:31,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:22:31,481 INFO L87 Difference]: Start difference. First operand has 426 states, 421 states have (on average 1.8598574821852731) internal successors, (783), 425 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:32,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:32,132 INFO L93 Difference]: Finished difference Result 712 states and 1257 transitions. [2023-11-24 23:22:32,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:22:32,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-24 23:22:32,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:32,149 INFO L225 Difference]: With dead ends: 712 [2023-11-24 23:22:32,150 INFO L226 Difference]: Without dead ends: 449 [2023-11-24 23:22:32,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:22:32,158 INFO L413 NwaCegarLoop]: 445 mSDtfsCounter, 2125 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2125 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:32,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2125 Valid, 551 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:22:32,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-11-24 23:22:32,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 443. [2023-11-24 23:22:32,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 439 states have (on average 1.3143507972665147) internal successors, (577), 442 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:32,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 577 transitions. [2023-11-24 23:22:32,260 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 577 transitions. Word has length 49 [2023-11-24 23:22:32,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:32,261 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 577 transitions. [2023-11-24 23:22:32,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:32,261 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 577 transitions. [2023-11-24 23:22:32,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-24 23:22:32,268 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:32,268 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] [2023-11-24 23:22:32,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:22:32,269 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:32,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:32,270 INFO L85 PathProgramCache]: Analyzing trace with hash 758566708, now seen corresponding path program 1 times [2023-11-24 23:22:32,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:32,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195954088] [2023-11-24 23:22:32,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:32,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:32,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:32,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195954088] [2023-11-24 23:22:32,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195954088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:32,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:32,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:22:32,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048393598] [2023-11-24 23:22:32,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:32,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:22:32,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:32,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:22:32,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:22:32,418 INFO L87 Difference]: Start difference. First operand 443 states and 577 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:32,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:32,486 INFO L93 Difference]: Finished difference Result 724 states and 978 transitions. [2023-11-24 23:22:32,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:22:32,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-24 23:22:32,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:32,492 INFO L225 Difference]: With dead ends: 724 [2023-11-24 23:22:32,493 INFO L226 Difference]: Without dead ends: 566 [2023-11-24 23:22:32,496 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 [2023-11-24 23:22:32,497 INFO L413 NwaCegarLoop]: 476 mSDtfsCounter, 279 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:32,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 753 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:22:32,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2023-11-24 23:22:32,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 560. [2023-11-24 23:22:32,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 556 states have (on average 1.3435251798561152) internal successors, (747), 559 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:32,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 747 transitions. [2023-11-24 23:22:32,529 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 747 transitions. Word has length 49 [2023-11-24 23:22:32,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:32,531 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 747 transitions. [2023-11-24 23:22:32,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:32,531 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 747 transitions. [2023-11-24 23:22:32,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-24 23:22:32,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:32,534 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] [2023-11-24 23:22:32,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:22:32,535 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:32,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:32,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1943064238, now seen corresponding path program 1 times [2023-11-24 23:22:32,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:32,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116236954] [2023-11-24 23:22:32,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:32,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:32,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:32,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116236954] [2023-11-24 23:22:32,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116236954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:32,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:32,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:22:32,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326221485] [2023-11-24 23:22:32,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:32,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:22:32,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:32,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:22:32,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:22:32,678 INFO L87 Difference]: Start difference. First operand 560 states and 747 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:32,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:32,776 INFO L93 Difference]: Finished difference Result 1072 states and 1473 transitions. [2023-11-24 23:22:32,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:22:32,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-24 23:22:32,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:32,783 INFO L225 Difference]: With dead ends: 1072 [2023-11-24 23:22:32,784 INFO L226 Difference]: Without dead ends: 810 [2023-11-24 23:22:32,786 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 [2023-11-24 23:22:32,790 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 236 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:32,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 786 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:22:32,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2023-11-24 23:22:32,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 803. [2023-11-24 23:22:32,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 799 states have (on average 1.360450563204005) internal successors, (1087), 802 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1087 transitions. [2023-11-24 23:22:32,846 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1087 transitions. Word has length 49 [2023-11-24 23:22:32,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:32,846 INFO L495 AbstractCegarLoop]: Abstraction has 803 states and 1087 transitions. [2023-11-24 23:22:32,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:32,846 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1087 transitions. [2023-11-24 23:22:32,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-24 23:22:32,848 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:32,849 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] [2023-11-24 23:22:32,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:22:32,849 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:32,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:32,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1798780356, now seen corresponding path program 1 times [2023-11-24 23:22:32,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:32,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500026061] [2023-11-24 23:22:32,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:32,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:32,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:32,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500026061] [2023-11-24 23:22:32,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500026061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:32,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:32,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:22:32,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853178242] [2023-11-24 23:22:32,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:32,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:22:32,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:32,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:22:32,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:22:32,984 INFO L87 Difference]: Start difference. First operand 803 states and 1087 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:33,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:33,371 INFO L93 Difference]: Finished difference Result 1892 states and 2622 transitions. [2023-11-24 23:22:33,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:22:33,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-24 23:22:33,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:33,379 INFO L225 Difference]: With dead ends: 1892 [2023-11-24 23:22:33,379 INFO L226 Difference]: Without dead ends: 1184 [2023-11-24 23:22:33,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:22:33,382 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 1271 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:33,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1271 Valid, 318 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:22:33,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2023-11-24 23:22:33,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1178. [2023-11-24 23:22:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1174 states have (on average 1.374787052810903) internal successors, (1614), 1177 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:33,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1614 transitions. [2023-11-24 23:22:33,416 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1614 transitions. Word has length 49 [2023-11-24 23:22:33,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:33,417 INFO L495 AbstractCegarLoop]: Abstraction has 1178 states and 1614 transitions. [2023-11-24 23:22:33,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1614 transitions. [2023-11-24 23:22:33,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-24 23:22:33,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:33,419 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] [2023-11-24 23:22:33,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:22:33,420 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:33,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:33,421 INFO L85 PathProgramCache]: Analyzing trace with hash -108782984, now seen corresponding path program 1 times [2023-11-24 23:22:33,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:33,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283413125] [2023-11-24 23:22:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:33,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:33,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:33,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:33,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283413125] [2023-11-24 23:22:33,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283413125] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:33,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:33,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:22:33,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228706009] [2023-11-24 23:22:33,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:33,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:22:33,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:33,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:22:33,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:22:33,524 INFO L87 Difference]: Start difference. First operand 1178 states and 1614 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:33,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:33,596 INFO L93 Difference]: Finished difference Result 2893 states and 3999 transitions. [2023-11-24 23:22:33,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:22:33,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-24 23:22:33,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:33,607 INFO L225 Difference]: With dead ends: 2893 [2023-11-24 23:22:33,608 INFO L226 Difference]: Without dead ends: 1899 [2023-11-24 23:22:33,609 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 [2023-11-24 23:22:33,610 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 276 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:33,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 720 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:22:33,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2023-11-24 23:22:33,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1893. [2023-11-24 23:22:33,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1889 states have (on average 1.3610375860243515) internal successors, (2571), 1892 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:33,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 2571 transitions. [2023-11-24 23:22:33,670 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 2571 transitions. Word has length 50 [2023-11-24 23:22:33,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:33,670 INFO L495 AbstractCegarLoop]: Abstraction has 1893 states and 2571 transitions. [2023-11-24 23:22:33,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:33,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 2571 transitions. [2023-11-24 23:22:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-24 23:22:33,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:33,674 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] [2023-11-24 23:22:33,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:22:33,678 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:33,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:33,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1856759737, now seen corresponding path program 1 times [2023-11-24 23:22:33,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:33,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234531574] [2023-11-24 23:22:33,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:33,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:33,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:33,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234531574] [2023-11-24 23:22:33,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234531574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:33,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:33,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:22:33,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741781128] [2023-11-24 23:22:33,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:33,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:22:33,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:33,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:22:33,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:22:33,822 INFO L87 Difference]: Start difference. First operand 1893 states and 2571 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:34,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:34,214 INFO L93 Difference]: Finished difference Result 4654 states and 6390 transitions. [2023-11-24 23:22:34,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:22:34,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-11-24 23:22:34,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:34,230 INFO L225 Difference]: With dead ends: 4654 [2023-11-24 23:22:34,230 INFO L226 Difference]: Without dead ends: 2931 [2023-11-24 23:22:34,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:22:34,237 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 1167 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1167 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:34,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1167 Valid, 270 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:22:34,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2931 states. [2023-11-24 23:22:34,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2931 to 2924. [2023-11-24 23:22:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2924 states, 2920 states have (on average 1.3623287671232878) internal successors, (3978), 2923 states have internal predecessors, (3978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:34,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2924 states to 2924 states and 3978 transitions. [2023-11-24 23:22:34,351 INFO L78 Accepts]: Start accepts. Automaton has 2924 states and 3978 transitions. Word has length 51 [2023-11-24 23:22:34,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:34,353 INFO L495 AbstractCegarLoop]: Abstraction has 2924 states and 3978 transitions. [2023-11-24 23:22:34,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:34,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2924 states and 3978 transitions. [2023-11-24 23:22:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-24 23:22:34,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:34,356 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] [2023-11-24 23:22:34,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:22:34,357 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:34,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:34,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1124331061, now seen corresponding path program 1 times [2023-11-24 23:22:34,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:34,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392306655] [2023-11-24 23:22:34,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:34,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:34,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:34,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392306655] [2023-11-24 23:22:34,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392306655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:34,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:34,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:22:34,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107521468] [2023-11-24 23:22:34,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:34,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:22:34,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:34,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:22:34,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:22:34,556 INFO L87 Difference]: Start difference. First operand 2924 states and 3978 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:35,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:35,203 INFO L93 Difference]: Finished difference Result 9735 states and 13404 transitions. [2023-11-24 23:22:35,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 23:22:35,204 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-11-24 23:22:35,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:35,252 INFO L225 Difference]: With dead ends: 9735 [2023-11-24 23:22:35,253 INFO L226 Difference]: Without dead ends: 8640 [2023-11-24 23:22:35,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-24 23:22:35,257 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 2290 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2290 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:35,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2290 Valid, 505 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:22:35,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8640 states. [2023-11-24 23:22:35,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8640 to 2938. [2023-11-24 23:22:35,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2934 states have (on average 1.361963190184049) internal successors, (3996), 2937 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:35,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 3996 transitions. [2023-11-24 23:22:35,438 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 3996 transitions. Word has length 52 [2023-11-24 23:22:35,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:35,439 INFO L495 AbstractCegarLoop]: Abstraction has 2938 states and 3996 transitions. [2023-11-24 23:22:35,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:35,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 3996 transitions. [2023-11-24 23:22:35,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-24 23:22:35,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:35,442 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] [2023-11-24 23:22:35,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:22:35,443 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:35,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:35,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1221262858, now seen corresponding path program 1 times [2023-11-24 23:22:35,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:35,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918551048] [2023-11-24 23:22:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:35,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:35,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:35,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918551048] [2023-11-24 23:22:35,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918551048] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:35,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:35,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:22:35,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689293657] [2023-11-24 23:22:35,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:35,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:22:35,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:35,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:22:35,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:22:35,639 INFO L87 Difference]: Start difference. First operand 2938 states and 3996 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:36,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:36,425 INFO L93 Difference]: Finished difference Result 10791 states and 14940 transitions. [2023-11-24 23:22:36,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 23:22:36,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-11-24 23:22:36,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:36,499 INFO L225 Difference]: With dead ends: 10791 [2023-11-24 23:22:36,499 INFO L226 Difference]: Without dead ends: 9851 [2023-11-24 23:22:36,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-24 23:22:36,505 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 1772 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:36,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1772 Valid, 598 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:22:36,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9851 states. [2023-11-24 23:22:36,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9851 to 2960. [2023-11-24 23:22:36,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2960 states, 2956 states have (on average 1.3623139377537212) internal successors, (4027), 2959 states have internal predecessors, (4027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:36,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2960 states to 2960 states and 4027 transitions. [2023-11-24 23:22:36,677 INFO L78 Accepts]: Start accepts. Automaton has 2960 states and 4027 transitions. Word has length 52 [2023-11-24 23:22:36,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:36,679 INFO L495 AbstractCegarLoop]: Abstraction has 2960 states and 4027 transitions. [2023-11-24 23:22:36,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:36,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2960 states and 4027 transitions. [2023-11-24 23:22:36,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-24 23:22:36,682 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:36,682 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] [2023-11-24 23:22:36,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 23:22:36,683 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:36,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:36,683 INFO L85 PathProgramCache]: Analyzing trace with hash -163415276, now seen corresponding path program 1 times [2023-11-24 23:22:36,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:36,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412644771] [2023-11-24 23:22:36,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:36,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:36,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:36,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412644771] [2023-11-24 23:22:36,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412644771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:36,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:36,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:22:36,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734137177] [2023-11-24 23:22:36,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:36,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:22:36,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:36,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:22:36,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:22:36,858 INFO L87 Difference]: Start difference. First operand 2960 states and 4027 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:37,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:37,592 INFO L93 Difference]: Finished difference Result 12802 states and 17753 transitions. [2023-11-24 23:22:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 23:22:37,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-11-24 23:22:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:37,617 INFO L225 Difference]: With dead ends: 12802 [2023-11-24 23:22:37,617 INFO L226 Difference]: Without dead ends: 11748 [2023-11-24 23:22:37,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-24 23:22:37,623 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 2602 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2602 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:37,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2602 Valid, 538 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:22:37,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11748 states. [2023-11-24 23:22:37,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11748 to 2994. [2023-11-24 23:22:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2990 states have (on average 1.3615384615384616) internal successors, (4071), 2993 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:37,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 4071 transitions. [2023-11-24 23:22:37,774 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 4071 transitions. Word has length 52 [2023-11-24 23:22:37,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:37,774 INFO L495 AbstractCegarLoop]: Abstraction has 2994 states and 4071 transitions. [2023-11-24 23:22:37,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:37,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 4071 transitions. [2023-11-24 23:22:37,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-24 23:22:37,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:37,778 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] [2023-11-24 23:22:37,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 23:22:37,779 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:37,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:37,779 INFO L85 PathProgramCache]: Analyzing trace with hash -55106621, now seen corresponding path program 1 times [2023-11-24 23:22:37,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:37,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370753884] [2023-11-24 23:22:37,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:37,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:38,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:38,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370753884] [2023-11-24 23:22:38,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370753884] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:38,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:38,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:22:38,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268048689] [2023-11-24 23:22:38,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:38,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:22:38,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:38,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:22:38,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:22:38,091 INFO L87 Difference]: Start difference. First operand 2994 states and 4071 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:38,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:38,775 INFO L93 Difference]: Finished difference Result 7494 states and 10329 transitions. [2023-11-24 23:22:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:22:38,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-11-24 23:22:38,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:38,786 INFO L225 Difference]: With dead ends: 7494 [2023-11-24 23:22:38,787 INFO L226 Difference]: Without dead ends: 5462 [2023-11-24 23:22:38,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:22:38,791 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 1307 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1307 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:38,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1307 Valid, 733 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:22:38,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5462 states. [2023-11-24 23:22:38,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5462 to 2916. [2023-11-24 23:22:38,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2912 states have (on average 1.3602335164835164) internal successors, (3961), 2915 states have internal predecessors, (3961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:38,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 3961 transitions. [2023-11-24 23:22:38,869 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 3961 transitions. Word has length 53 [2023-11-24 23:22:38,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:38,869 INFO L495 AbstractCegarLoop]: Abstraction has 2916 states and 3961 transitions. [2023-11-24 23:22:38,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:38,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 3961 transitions. [2023-11-24 23:22:38,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-24 23:22:38,873 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:38,873 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] [2023-11-24 23:22:38,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 23:22:38,873 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:38,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:38,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1129390909, now seen corresponding path program 1 times [2023-11-24 23:22:38,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:38,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719897943] [2023-11-24 23:22:38,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:38,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:39,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:39,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719897943] [2023-11-24 23:22:39,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719897943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:39,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:39,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:22:39,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387326763] [2023-11-24 23:22:39,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:39,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:22:39,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:39,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:22:39,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:22:39,226 INFO L87 Difference]: Start difference. First operand 2916 states and 3961 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:40,168 INFO L93 Difference]: Finished difference Result 7995 states and 10964 transitions. [2023-11-24 23:22:40,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 23:22:40,169 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-11-24 23:22:40,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:40,181 INFO L225 Difference]: With dead ends: 7995 [2023-11-24 23:22:40,181 INFO L226 Difference]: Without dead ends: 6093 [2023-11-24 23:22:40,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-11-24 23:22:40,186 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 894 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:40,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [894 Valid, 1170 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:22:40,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6093 states. [2023-11-24 23:22:40,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6093 to 2887. [2023-11-24 23:22:40,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2883 states have (on average 1.3596947624002775) internal successors, (3920), 2886 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:40,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 3920 transitions. [2023-11-24 23:22:40,277 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 3920 transitions. Word has length 53 [2023-11-24 23:22:40,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:40,277 INFO L495 AbstractCegarLoop]: Abstraction has 2887 states and 3920 transitions. [2023-11-24 23:22:40,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:40,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 3920 transitions. [2023-11-24 23:22:40,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-24 23:22:40,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:40,281 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] [2023-11-24 23:22:40,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 23:22:40,281 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:40,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:40,282 INFO L85 PathProgramCache]: Analyzing trace with hash -421230622, now seen corresponding path program 1 times [2023-11-24 23:22:40,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:40,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404672003] [2023-11-24 23:22:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:40,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:40,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:40,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404672003] [2023-11-24 23:22:40,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404672003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:40,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:40,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:22:40,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988359980] [2023-11-24 23:22:40,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:40,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:22:40,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:40,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:22:40,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:22:40,641 INFO L87 Difference]: Start difference. First operand 2887 states and 3920 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:41,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:41,556 INFO L93 Difference]: Finished difference Result 6005 states and 8183 transitions. [2023-11-24 23:22:41,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 23:22:41,556 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-11-24 23:22:41,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:41,574 INFO L225 Difference]: With dead ends: 6005 [2023-11-24 23:22:41,574 INFO L226 Difference]: Without dead ends: 6000 [2023-11-24 23:22:41,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2023-11-24 23:22:41,578 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 1369 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1369 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:41,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1369 Valid, 1057 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:22:41,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6000 states. [2023-11-24 23:22:41,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6000 to 2887. [2023-11-24 23:22:41,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2883 states have (on average 1.3590010405827264) internal successors, (3918), 2886 states have internal predecessors, (3918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 3918 transitions. [2023-11-24 23:22:41,683 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 3918 transitions. Word has length 53 [2023-11-24 23:22:41,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:41,683 INFO L495 AbstractCegarLoop]: Abstraction has 2887 states and 3918 transitions. [2023-11-24 23:22:41,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 3918 transitions. [2023-11-24 23:22:41,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-24 23:22:41,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:41,690 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] [2023-11-24 23:22:41,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 23:22:41,690 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:41,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:41,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1237294753, now seen corresponding path program 1 times [2023-11-24 23:22:41,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:41,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594583107] [2023-11-24 23:22:41,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:41,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:41,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:41,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594583107] [2023-11-24 23:22:41,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594583107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:41,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:41,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:22:41,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199080075] [2023-11-24 23:22:41,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:41,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:22:41,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:41,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:22:41,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:22:41,766 INFO L87 Difference]: Start difference. First operand 2887 states and 3918 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:41,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:41,869 INFO L93 Difference]: Finished difference Result 3946 states and 5380 transitions. [2023-11-24 23:22:41,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:22:41,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-24 23:22:41,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:41,876 INFO L225 Difference]: With dead ends: 3946 [2023-11-24 23:22:41,876 INFO L226 Difference]: Without dead ends: 2894 [2023-11-24 23:22:41,877 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 [2023-11-24 23:22:41,879 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 180 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:41,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 671 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:22:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2023-11-24 23:22:41,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 2887. [2023-11-24 23:22:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2883 states have (on average 1.3423517169614985) internal successors, (3870), 2886 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:41,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 3870 transitions. [2023-11-24 23:22:41,933 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 3870 transitions. Word has length 54 [2023-11-24 23:22:41,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:41,933 INFO L495 AbstractCegarLoop]: Abstraction has 2887 states and 3870 transitions. [2023-11-24 23:22:41,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:41,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 3870 transitions. [2023-11-24 23:22:41,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-24 23:22:41,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:41,939 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] [2023-11-24 23:22:41,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 23:22:41,939 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:41,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:41,940 INFO L85 PathProgramCache]: Analyzing trace with hash -863697757, now seen corresponding path program 1 times [2023-11-24 23:22:41,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:41,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679839] [2023-11-24 23:22:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:41,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:42,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:42,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679839] [2023-11-24 23:22:42,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679839] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:42,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:42,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:22:42,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076736682] [2023-11-24 23:22:42,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:42,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:22:42,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:42,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:22:42,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:22:42,018 INFO L87 Difference]: Start difference. First operand 2887 states and 3870 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:42,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:42,071 INFO L93 Difference]: Finished difference Result 4007 states and 5396 transitions. [2023-11-24 23:22:42,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:22:42,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-24 23:22:42,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:42,076 INFO L225 Difference]: With dead ends: 4007 [2023-11-24 23:22:42,076 INFO L226 Difference]: Without dead ends: 2893 [2023-11-24 23:22:42,079 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 [2023-11-24 23:22:42,079 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 196 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:42,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 672 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:22:42,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2023-11-24 23:22:42,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 2887. [2023-11-24 23:22:42,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2883 states have (on average 1.327089836975373) internal successors, (3826), 2886 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:42,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 3826 transitions. [2023-11-24 23:22:42,133 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 3826 transitions. Word has length 54 [2023-11-24 23:22:42,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:42,134 INFO L495 AbstractCegarLoop]: Abstraction has 2887 states and 3826 transitions. [2023-11-24 23:22:42,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:42,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 3826 transitions. [2023-11-24 23:22:42,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-24 23:22:42,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:42,140 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] [2023-11-24 23:22:42,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 23:22:42,140 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:42,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:42,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1589153365, now seen corresponding path program 1 times [2023-11-24 23:22:42,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:42,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321056766] [2023-11-24 23:22:42,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:42,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:42,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:42,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321056766] [2023-11-24 23:22:42,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321056766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:42,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:42,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:22:42,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378046183] [2023-11-24 23:22:42,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:42,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:22:42,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:42,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:22:42,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:22:42,209 INFO L87 Difference]: Start difference. First operand 2887 states and 3826 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:42,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:42,255 INFO L93 Difference]: Finished difference Result 4036 states and 5379 transitions. [2023-11-24 23:22:42,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:22:42,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-24 23:22:42,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:42,260 INFO L225 Difference]: With dead ends: 4036 [2023-11-24 23:22:42,260 INFO L226 Difference]: Without dead ends: 2878 [2023-11-24 23:22:42,264 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 [2023-11-24 23:22:42,265 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 216 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:42,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 692 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:22:42,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2878 states. [2023-11-24 23:22:42,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2878 to 2872. [2023-11-24 23:22:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2868 states have (on average 1.306834030683403) internal successors, (3748), 2871 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:42,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 3748 transitions. [2023-11-24 23:22:42,315 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 3748 transitions. Word has length 54 [2023-11-24 23:22:42,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:42,315 INFO L495 AbstractCegarLoop]: Abstraction has 2872 states and 3748 transitions. [2023-11-24 23:22:42,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:42,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 3748 transitions. [2023-11-24 23:22:42,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-24 23:22:42,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:42,319 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] [2023-11-24 23:22:42,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 23:22:42,320 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:42,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:42,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1127796312, now seen corresponding path program 1 times [2023-11-24 23:22:42,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:42,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248563511] [2023-11-24 23:22:42,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:42,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:42,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:42,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248563511] [2023-11-24 23:22:42,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248563511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:42,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:42,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:22:42,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122842846] [2023-11-24 23:22:42,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:42,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:22:42,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:42,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:22:42,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:22:42,377 INFO L87 Difference]: Start difference. First operand 2872 states and 3748 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:42,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:42,445 INFO L93 Difference]: Finished difference Result 4519 states and 5947 transitions. [2023-11-24 23:22:42,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:22:42,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-24 23:22:42,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:42,450 INFO L225 Difference]: With dead ends: 4519 [2023-11-24 23:22:42,451 INFO L226 Difference]: Without dead ends: 3218 [2023-11-24 23:22:42,453 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 [2023-11-24 23:22:42,454 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 282 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:42,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 476 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:22:42,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3218 states. [2023-11-24 23:22:42,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3218 to 2662. [2023-11-24 23:22:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2658 states have (on average 1.3054928517682467) internal successors, (3470), 2661 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:42,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3470 transitions. [2023-11-24 23:22:42,535 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3470 transitions. Word has length 55 [2023-11-24 23:22:42,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:42,536 INFO L495 AbstractCegarLoop]: Abstraction has 2662 states and 3470 transitions. [2023-11-24 23:22:42,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:42,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3470 transitions. [2023-11-24 23:22:42,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-24 23:22:42,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:42,539 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] [2023-11-24 23:22:42,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 23:22:42,539 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:42,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:42,540 INFO L85 PathProgramCache]: Analyzing trace with hash 847139516, now seen corresponding path program 1 times [2023-11-24 23:22:42,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:42,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759003166] [2023-11-24 23:22:42,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:42,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:42,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:42,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759003166] [2023-11-24 23:22:42,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759003166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:42,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:42,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:22:42,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372775646] [2023-11-24 23:22:42,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:42,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:22:42,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:42,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:22:42,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:22:42,609 INFO L87 Difference]: Start difference. First operand 2662 states and 3470 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:42,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:42,712 INFO L93 Difference]: Finished difference Result 4438 states and 5797 transitions. [2023-11-24 23:22:42,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:22:42,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-24 23:22:42,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:42,717 INFO L225 Difference]: With dead ends: 4438 [2023-11-24 23:22:42,718 INFO L226 Difference]: Without dead ends: 3077 [2023-11-24 23:22:42,723 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 [2023-11-24 23:22:42,725 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 255 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:42,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 376 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:22:42,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2023-11-24 23:22:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 2510. [2023-11-24 23:22:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2510 states, 2506 states have (on average 1.3048683160415004) internal successors, (3270), 2509 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:42,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2510 states to 2510 states and 3270 transitions. [2023-11-24 23:22:42,775 INFO L78 Accepts]: Start accepts. Automaton has 2510 states and 3270 transitions. Word has length 56 [2023-11-24 23:22:42,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:42,775 INFO L495 AbstractCegarLoop]: Abstraction has 2510 states and 3270 transitions. [2023-11-24 23:22:42,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:42,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2510 states and 3270 transitions. [2023-11-24 23:22:42,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-24 23:22:42,779 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:42,779 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] [2023-11-24 23:22:42,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 23:22:42,780 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:42,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:42,780 INFO L85 PathProgramCache]: Analyzing trace with hash 474120695, now seen corresponding path program 1 times [2023-11-24 23:22:42,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:42,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602148657] [2023-11-24 23:22:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:42,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:43,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:43,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602148657] [2023-11-24 23:22:43,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602148657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:43,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:43,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-24 23:22:43,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191668724] [2023-11-24 23:22:43,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:43,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 23:22:43,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:43,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 23:22:43,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:22:43,569 INFO L87 Difference]: Start difference. First operand 2510 states and 3270 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:44,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:44,615 INFO L93 Difference]: Finished difference Result 3952 states and 5163 transitions. [2023-11-24 23:22:44,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 23:22:44,616 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-24 23:22:44,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:44,623 INFO L225 Difference]: With dead ends: 3952 [2023-11-24 23:22:44,623 INFO L226 Difference]: Without dead ends: 3948 [2023-11-24 23:22:44,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-24 23:22:44,625 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 1773 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1773 SdHoareTripleChecker+Valid, 1996 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:44,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1773 Valid, 1996 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:22:44,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2023-11-24 23:22:44,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 2506. [2023-11-24 23:22:44,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2503 states have (on average 1.3044346783859369) internal successors, (3265), 2505 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 3265 transitions. [2023-11-24 23:22:44,675 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 3265 transitions. Word has length 56 [2023-11-24 23:22:44,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:44,675 INFO L495 AbstractCegarLoop]: Abstraction has 2506 states and 3265 transitions. [2023-11-24 23:22:44,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:44,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 3265 transitions. [2023-11-24 23:22:44,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-24 23:22:44,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:44,678 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] [2023-11-24 23:22:44,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 23:22:44,679 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:44,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:44,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1321631968, now seen corresponding path program 1 times [2023-11-24 23:22:44,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:44,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090201073] [2023-11-24 23:22:44,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:44,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:45,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:45,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090201073] [2023-11-24 23:22:45,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090201073] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:45,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:45,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-24 23:22:45,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390070955] [2023-11-24 23:22:45,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:45,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 23:22:45,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:45,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 23:22:45,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-11-24 23:22:45,837 INFO L87 Difference]: Start difference. First operand 2506 states and 3265 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:48,493 INFO L93 Difference]: Finished difference Result 3444 states and 4473 transitions. [2023-11-24 23:22:48,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-24 23:22:48,494 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-24 23:22:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:48,499 INFO L225 Difference]: With dead ends: 3444 [2023-11-24 23:22:48,499 INFO L226 Difference]: Without dead ends: 3438 [2023-11-24 23:22:48,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=270, Invalid=1136, Unknown=0, NotChecked=0, Total=1406 [2023-11-24 23:22:48,502 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 1746 mSDsluCounter, 3483 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1746 SdHoareTripleChecker+Valid, 3836 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:48,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1746 Valid, 3836 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-24 23:22:48,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3438 states. [2023-11-24 23:22:48,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3438 to 2506. [2023-11-24 23:22:48,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2503 states have (on average 1.3040351578106273) internal successors, (3264), 2505 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:48,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 3264 transitions. [2023-11-24 23:22:48,547 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 3264 transitions. Word has length 56 [2023-11-24 23:22:48,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:48,548 INFO L495 AbstractCegarLoop]: Abstraction has 2506 states and 3264 transitions. [2023-11-24 23:22:48,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:48,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 3264 transitions. [2023-11-24 23:22:48,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-24 23:22:48,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:48,551 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] [2023-11-24 23:22:48,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 23:22:48,552 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:48,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:48,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1854706179, now seen corresponding path program 1 times [2023-11-24 23:22:48,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:48,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055718142] [2023-11-24 23:22:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:48,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:49,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:49,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055718142] [2023-11-24 23:22:49,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055718142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:49,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:49,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-24 23:22:49,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178243909] [2023-11-24 23:22:49,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:49,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 23:22:49,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:49,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 23:22:49,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:22:49,136 INFO L87 Difference]: Start difference. First operand 2506 states and 3264 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:50,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:50,232 INFO L93 Difference]: Finished difference Result 3586 states and 4685 transitions. [2023-11-24 23:22:50,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 23:22:50,233 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-24 23:22:50,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:50,238 INFO L225 Difference]: With dead ends: 3586 [2023-11-24 23:22:50,239 INFO L226 Difference]: Without dead ends: 3364 [2023-11-24 23:22:50,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-24 23:22:50,241 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 1321 mSDsluCounter, 2473 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1321 SdHoareTripleChecker+Valid, 2933 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:50,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1321 Valid, 2933 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:22:50,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2023-11-24 23:22:50,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 2494. [2023-11-24 23:22:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2492 states have (on average 1.3045746388443018) internal successors, (3251), 2493 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:50,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 3251 transitions. [2023-11-24 23:22:50,287 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 3251 transitions. Word has length 56 [2023-11-24 23:22:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:50,288 INFO L495 AbstractCegarLoop]: Abstraction has 2494 states and 3251 transitions. [2023-11-24 23:22:50,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:50,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 3251 transitions. [2023-11-24 23:22:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-24 23:22:50,291 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:50,291 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] [2023-11-24 23:22:50,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-24 23:22:50,292 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:50,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:50,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1858163223, now seen corresponding path program 1 times [2023-11-24 23:22:50,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:50,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136668936] [2023-11-24 23:22:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:50,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:50,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:50,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136668936] [2023-11-24 23:22:50,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136668936] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:50,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:50,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-24 23:22:50,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536671079] [2023-11-24 23:22:50,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:50,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 23:22:50,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:50,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 23:22:50,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:22:50,949 INFO L87 Difference]: Start difference. First operand 2494 states and 3251 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:51,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:51,984 INFO L93 Difference]: Finished difference Result 4142 states and 5411 transitions. [2023-11-24 23:22:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 23:22:51,984 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-24 23:22:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:51,989 INFO L225 Difference]: With dead ends: 4142 [2023-11-24 23:22:51,989 INFO L226 Difference]: Without dead ends: 4138 [2023-11-24 23:22:51,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2023-11-24 23:22:51,992 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 1402 mSDsluCounter, 2062 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1402 SdHoareTripleChecker+Valid, 2564 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:51,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1402 Valid, 2564 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:22:51,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2023-11-24 23:22:52,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 2494. [2023-11-24 23:22:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2492 states have (on average 1.3041733547351524) internal successors, (3250), 2493 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:52,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 3250 transitions. [2023-11-24 23:22:52,041 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 3250 transitions. Word has length 56 [2023-11-24 23:22:52,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:52,042 INFO L495 AbstractCegarLoop]: Abstraction has 2494 states and 3250 transitions. [2023-11-24 23:22:52,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:52,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 3250 transitions. [2023-11-24 23:22:52,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-24 23:22:52,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:52,045 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] [2023-11-24 23:22:52,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-24 23:22:52,046 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:52,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:52,047 INFO L85 PathProgramCache]: Analyzing trace with hash -612654208, now seen corresponding path program 1 times [2023-11-24 23:22:52,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:52,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824520550] [2023-11-24 23:22:52,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:52,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:52,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:52,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824520550] [2023-11-24 23:22:52,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824520550] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:52,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:52,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:22:52,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729587235] [2023-11-24 23:22:52,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:52,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:22:52,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:52,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:22:52,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:22:52,095 INFO L87 Difference]: Start difference. First operand 2494 states and 3250 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:52,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:52,158 INFO L93 Difference]: Finished difference Result 3991 states and 5215 transitions. [2023-11-24 23:22:52,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:22:52,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-24 23:22:52,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:52,162 INFO L225 Difference]: With dead ends: 3991 [2023-11-24 23:22:52,163 INFO L226 Difference]: Without dead ends: 2704 [2023-11-24 23:22:52,165 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 [2023-11-24 23:22:52,165 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 207 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:52,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 389 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:22:52,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2023-11-24 23:22:52,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2382. [2023-11-24 23:22:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2381 states have (on average 1.3011339773204535) internal successors, (3098), 2381 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:52,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 3098 transitions. [2023-11-24 23:22:52,202 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 3098 transitions. Word has length 56 [2023-11-24 23:22:52,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:52,203 INFO L495 AbstractCegarLoop]: Abstraction has 2382 states and 3098 transitions. [2023-11-24 23:22:52,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:52,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 3098 transitions. [2023-11-24 23:22:52,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-24 23:22:52,206 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:52,206 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] [2023-11-24 23:22:52,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-24 23:22:52,206 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:52,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:52,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1785037930, now seen corresponding path program 1 times [2023-11-24 23:22:52,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:52,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290158770] [2023-11-24 23:22:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:52,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:52,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:52,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290158770] [2023-11-24 23:22:52,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290158770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:52,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:52,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:22:52,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801196862] [2023-11-24 23:22:52,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:52,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:22:52,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:52,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:22:52,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:22:52,319 INFO L87 Difference]: Start difference. First operand 2382 states and 3098 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:52,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:52,442 INFO L93 Difference]: Finished difference Result 2388 states and 3101 transitions. [2023-11-24 23:22:52,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:22:52,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-24 23:22:52,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:52,446 INFO L225 Difference]: With dead ends: 2388 [2023-11-24 23:22:52,446 INFO L226 Difference]: Without dead ends: 2081 [2023-11-24 23:22:52,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:22:52,448 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 469 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:52,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 552 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:22:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2023-11-24 23:22:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 2077. [2023-11-24 23:22:52,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2077 states, 2076 states have (on average 1.2991329479768785) internal successors, (2697), 2076 states have internal predecessors, (2697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:52,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 2697 transitions. [2023-11-24 23:22:52,477 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 2697 transitions. Word has length 56 [2023-11-24 23:22:52,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:52,478 INFO L495 AbstractCegarLoop]: Abstraction has 2077 states and 2697 transitions. [2023-11-24 23:22:52,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:52,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 2697 transitions. [2023-11-24 23:22:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-24 23:22:52,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:52,481 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] [2023-11-24 23:22:52,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-24 23:22:52,481 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:52,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:52,482 INFO L85 PathProgramCache]: Analyzing trace with hash -106059015, now seen corresponding path program 1 times [2023-11-24 23:22:52,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:52,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273516808] [2023-11-24 23:22:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:52,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:52,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:52,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273516808] [2023-11-24 23:22:52,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273516808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:52,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:52,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:22:52,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515405131] [2023-11-24 23:22:52,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:52,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:22:52,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:52,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:22:52,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:22:52,596 INFO L87 Difference]: Start difference. First operand 2077 states and 2697 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:52,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:52,642 INFO L93 Difference]: Finished difference Result 3793 states and 5023 transitions. [2023-11-24 23:22:52,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:22:52,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-24 23:22:52,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:52,647 INFO L225 Difference]: With dead ends: 3793 [2023-11-24 23:22:52,647 INFO L226 Difference]: Without dead ends: 2807 [2023-11-24 23:22:52,649 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 [2023-11-24 23:22:52,650 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 132 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:52,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 433 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:22:52,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2023-11-24 23:22:52,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 2613. [2023-11-24 23:22:52,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2613 states, 2612 states have (on average 1.2924961715160797) internal successors, (3376), 2612 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:52,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 3376 transitions. [2023-11-24 23:22:52,695 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 3376 transitions. Word has length 57 [2023-11-24 23:22:52,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:52,695 INFO L495 AbstractCegarLoop]: Abstraction has 2613 states and 3376 transitions. [2023-11-24 23:22:52,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:52,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 3376 transitions. [2023-11-24 23:22:52,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-24 23:22:52,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:52,698 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] [2023-11-24 23:22:52,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-24 23:22:52,698 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:52,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:52,699 INFO L85 PathProgramCache]: Analyzing trace with hash 540593195, now seen corresponding path program 1 times [2023-11-24 23:22:52,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:52,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691298080] [2023-11-24 23:22:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:52,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:52,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:52,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691298080] [2023-11-24 23:22:52,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691298080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:52,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:52,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:22:52,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186483942] [2023-11-24 23:22:52,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:52,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:22:52,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:52,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:22:52,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:22:52,814 INFO L87 Difference]: Start difference. First operand 2613 states and 3376 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:52,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:52,863 INFO L93 Difference]: Finished difference Result 5123 states and 6749 transitions. [2023-11-24 23:22:52,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:22:52,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-11-24 23:22:52,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:52,869 INFO L225 Difference]: With dead ends: 5123 [2023-11-24 23:22:52,869 INFO L226 Difference]: Without dead ends: 3757 [2023-11-24 23:22:52,872 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 [2023-11-24 23:22:52,873 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 112 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:52,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 429 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:22:52,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3757 states. [2023-11-24 23:22:52,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3757 to 3379. [2023-11-24 23:22:52,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3379 states, 3378 states have (on average 1.2904085257548845) internal successors, (4359), 3378 states have internal predecessors, (4359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:52,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3379 states to 3379 states and 4359 transitions. [2023-11-24 23:22:52,930 INFO L78 Accepts]: Start accepts. Automaton has 3379 states and 4359 transitions. Word has length 60 [2023-11-24 23:22:52,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:52,930 INFO L495 AbstractCegarLoop]: Abstraction has 3379 states and 4359 transitions. [2023-11-24 23:22:52,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:52,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3379 states and 4359 transitions. [2023-11-24 23:22:52,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-24 23:22:52,933 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:52,933 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, 1] [2023-11-24 23:22:52,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-24 23:22:52,934 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:52,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:52,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1345830140, now seen corresponding path program 1 times [2023-11-24 23:22:52,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:52,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443142346] [2023-11-24 23:22:52,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:52,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:53,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:53,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443142346] [2023-11-24 23:22:53,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443142346] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:53,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:53,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:22:53,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192403773] [2023-11-24 23:22:53,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:53,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:22:53,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:53,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:22:53,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:22:53,046 INFO L87 Difference]: Start difference. First operand 3379 states and 4359 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:53,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:53,112 INFO L93 Difference]: Finished difference Result 6913 states and 9071 transitions. [2023-11-24 23:22:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:22:53,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-11-24 23:22:53,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:53,120 INFO L225 Difference]: With dead ends: 6913 [2023-11-24 23:22:53,120 INFO L226 Difference]: Without dead ends: 5033 [2023-11-24 23:22:53,123 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 [2023-11-24 23:22:53,124 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 81 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:53,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 431 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:22:53,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5033 states. [2023-11-24 23:22:53,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5033 to 4511. [2023-11-24 23:22:53,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 4510 states have (on average 1.2838137472283815) internal successors, (5790), 4510 states have internal predecessors, (5790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:53,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 5790 transitions. [2023-11-24 23:22:53,238 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 5790 transitions. Word has length 64 [2023-11-24 23:22:53,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:53,238 INFO L495 AbstractCegarLoop]: Abstraction has 4511 states and 5790 transitions. [2023-11-24 23:22:53,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:53,239 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 5790 transitions. [2023-11-24 23:22:53,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-24 23:22:53,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:53,242 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, 1, 1, 1, 1, 1] [2023-11-24 23:22:53,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-24 23:22:53,243 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:53,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:53,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1004351148, now seen corresponding path program 1 times [2023-11-24 23:22:53,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:53,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135105990] [2023-11-24 23:22:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:53,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:53,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:53,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135105990] [2023-11-24 23:22:53,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135105990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:53,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:53,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 23:22:53,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648332980] [2023-11-24 23:22:53,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:53,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:22:53,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:53,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:22:53,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:22:53,633 INFO L87 Difference]: Start difference. First operand 4511 states and 5790 transitions. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:53,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:53,972 INFO L93 Difference]: Finished difference Result 9936 states and 12804 transitions. [2023-11-24 23:22:53,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-24 23:22:53,973 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-11-24 23:22:53,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:53,984 INFO L225 Difference]: With dead ends: 9936 [2023-11-24 23:22:53,985 INFO L226 Difference]: Without dead ends: 9934 [2023-11-24 23:22:53,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2023-11-24 23:22:53,988 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 1194 mSDsluCounter, 1214 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1194 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:53,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1194 Valid, 1531 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:22:53,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9934 states. [2023-11-24 23:22:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9934 to 5507. [2023-11-24 23:22:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5507 states, 5506 states have (on average 1.2778786778060298) internal successors, (7036), 5506 states have internal predecessors, (7036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5507 states to 5507 states and 7036 transitions. [2023-11-24 23:22:54,094 INFO L78 Accepts]: Start accepts. Automaton has 5507 states and 7036 transitions. Word has length 68 [2023-11-24 23:22:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:54,094 INFO L495 AbstractCegarLoop]: Abstraction has 5507 states and 7036 transitions. [2023-11-24 23:22:54,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 5507 states and 7036 transitions. [2023-11-24 23:22:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-24 23:22:54,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:54,099 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:22:54,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-24 23:22:54,099 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:54,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:54,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1467687864, now seen corresponding path program 1 times [2023-11-24 23:22:54,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:54,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108911807] [2023-11-24 23:22:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:54,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:54,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:54,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:54,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108911807] [2023-11-24 23:22:54,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108911807] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:54,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:54,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:22:54,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769928] [2023-11-24 23:22:54,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:54,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:22:54,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:54,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:22:54,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:22:54,245 INFO L87 Difference]: Start difference. First operand 5507 states and 7036 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:54,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:54,776 INFO L93 Difference]: Finished difference Result 11953 states and 15359 transitions. [2023-11-24 23:22:54,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 23:22:54,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-24 23:22:54,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:54,789 INFO L225 Difference]: With dead ends: 11953 [2023-11-24 23:22:54,789 INFO L226 Difference]: Without dead ends: 10433 [2023-11-24 23:22:54,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-24 23:22:54,794 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 1819 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1819 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:54,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1819 Valid, 407 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:22:54,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10433 states. [2023-11-24 23:22:54,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10433 to 5387. [2023-11-24 23:22:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5387 states, 5386 states have (on average 1.2781284812476792) internal successors, (6884), 5386 states have internal predecessors, (6884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5387 states to 5387 states and 6884 transitions. [2023-11-24 23:22:54,905 INFO L78 Accepts]: Start accepts. Automaton has 5387 states and 6884 transitions. Word has length 71 [2023-11-24 23:22:54,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:54,905 INFO L495 AbstractCegarLoop]: Abstraction has 5387 states and 6884 transitions. [2023-11-24 23:22:54,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:54,906 INFO L276 IsEmpty]: Start isEmpty. Operand 5387 states and 6884 transitions. [2023-11-24 23:22:54,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-24 23:22:54,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:54,909 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:22:54,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-24 23:22:54,910 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:54,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:54,910 INFO L85 PathProgramCache]: Analyzing trace with hash 311172158, now seen corresponding path program 1 times [2023-11-24 23:22:54,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:54,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361977315] [2023-11-24 23:22:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:54,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:55,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:55,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361977315] [2023-11-24 23:22:55,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361977315] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:55,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:55,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 23:22:55,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706914616] [2023-11-24 23:22:55,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:55,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:22:55,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:55,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:22:55,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:22:55,322 INFO L87 Difference]: Start difference. First operand 5387 states and 6884 transitions. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:55,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:55,620 INFO L93 Difference]: Finished difference Result 9390 states and 12130 transitions. [2023-11-24 23:22:55,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 23:22:55,621 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2023-11-24 23:22:55,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:55,633 INFO L225 Difference]: With dead ends: 9390 [2023-11-24 23:22:55,633 INFO L226 Difference]: Without dead ends: 9388 [2023-11-24 23:22:55,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-11-24 23:22:55,636 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 828 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:55,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [828 Valid, 1750 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:22:55,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9388 states. [2023-11-24 23:22:55,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9388 to 5859. [2023-11-24 23:22:55,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5859 states, 5858 states have (on average 1.2768863093205873) internal successors, (7480), 5858 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:55,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5859 states to 5859 states and 7480 transitions. [2023-11-24 23:22:55,776 INFO L78 Accepts]: Start accepts. Automaton has 5859 states and 7480 transitions. Word has length 73 [2023-11-24 23:22:55,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:55,776 INFO L495 AbstractCegarLoop]: Abstraction has 5859 states and 7480 transitions. [2023-11-24 23:22:55,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:55,777 INFO L276 IsEmpty]: Start isEmpty. Operand 5859 states and 7480 transitions. [2023-11-24 23:22:55,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-24 23:22:55,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:55,781 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:22:55,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-24 23:22:55,781 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:55,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:55,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1036801958, now seen corresponding path program 1 times [2023-11-24 23:22:55,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:55,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694802647] [2023-11-24 23:22:55,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:55,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:56,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:56,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694802647] [2023-11-24 23:22:56,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694802647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:56,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:56,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 23:22:56,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052955158] [2023-11-24 23:22:56,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:56,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:22:56,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:56,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:22:56,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:22:56,133 INFO L87 Difference]: Start difference. First operand 5859 states and 7480 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:56,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:56,507 INFO L93 Difference]: Finished difference Result 8407 states and 10786 transitions. [2023-11-24 23:22:56,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-24 23:22:56,508 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2023-11-24 23:22:56,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:56,517 INFO L225 Difference]: With dead ends: 8407 [2023-11-24 23:22:56,518 INFO L226 Difference]: Without dead ends: 8405 [2023-11-24 23:22:56,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2023-11-24 23:22:56,521 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 925 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:56,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [925 Valid, 1649 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:22:56,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8405 states. [2023-11-24 23:22:56,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8405 to 5837. [2023-11-24 23:22:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5837 states, 5836 states have (on average 1.2772446881425634) internal successors, (7454), 5836 states have internal predecessors, (7454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:56,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5837 states to 5837 states and 7454 transitions. [2023-11-24 23:22:56,618 INFO L78 Accepts]: Start accepts. Automaton has 5837 states and 7454 transitions. Word has length 74 [2023-11-24 23:22:56,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:56,618 INFO L495 AbstractCegarLoop]: Abstraction has 5837 states and 7454 transitions. [2023-11-24 23:22:56,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:56,619 INFO L276 IsEmpty]: Start isEmpty. Operand 5837 states and 7454 transitions. [2023-11-24 23:22:56,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-24 23:22:56,622 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:56,623 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:22:56,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-24 23:22:56,623 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:56,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:56,624 INFO L85 PathProgramCache]: Analyzing trace with hash 444966956, now seen corresponding path program 1 times [2023-11-24 23:22:56,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:56,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239610757] [2023-11-24 23:22:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:56,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:22:57,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:57,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239610757] [2023-11-24 23:22:57,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239610757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:57,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:57,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 23:22:57,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139328969] [2023-11-24 23:22:57,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:57,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:22:57,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:57,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:22:57,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:22:57,013 INFO L87 Difference]: Start difference. First operand 5837 states and 7454 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:57,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:57,326 INFO L93 Difference]: Finished difference Result 9736 states and 12557 transitions. [2023-11-24 23:22:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 23:22:57,327 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2023-11-24 23:22:57,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:57,336 INFO L225 Difference]: With dead ends: 9736 [2023-11-24 23:22:57,336 INFO L226 Difference]: Without dead ends: 9734 [2023-11-24 23:22:57,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-11-24 23:22:57,340 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 813 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:57,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 1731 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:22:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9734 states. [2023-11-24 23:22:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9734 to 6093. [2023-11-24 23:22:57,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6093 states, 6092 states have (on average 1.2765922521339461) internal successors, (7777), 6092 states have internal predecessors, (7777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:57,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6093 states to 6093 states and 7777 transitions. [2023-11-24 23:22:57,445 INFO L78 Accepts]: Start accepts. Automaton has 6093 states and 7777 transitions. Word has length 74 [2023-11-24 23:22:57,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:57,446 INFO L495 AbstractCegarLoop]: Abstraction has 6093 states and 7777 transitions. [2023-11-24 23:22:57,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:57,450 INFO L276 IsEmpty]: Start isEmpty. Operand 6093 states and 7777 transitions. [2023-11-24 23:22:57,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-24 23:22:57,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:57,454 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] [2023-11-24 23:22:57,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-24 23:22:57,455 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:57,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:57,455 INFO L85 PathProgramCache]: Analyzing trace with hash 425928445, now seen corresponding path program 1 times [2023-11-24 23:22:57,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:57,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793846267] [2023-11-24 23:22:57,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:57,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 23:22:57,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:57,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793846267] [2023-11-24 23:22:57,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793846267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:57,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:57,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:22:57,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820808508] [2023-11-24 23:22:57,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:57,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:22:57,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:57,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:22:57,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:22:57,742 INFO L87 Difference]: Start difference. First operand 6093 states and 7777 transitions. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:58,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:58,562 INFO L93 Difference]: Finished difference Result 12867 states and 16393 transitions. [2023-11-24 23:22:58,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 23:22:58,563 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-11-24 23:22:58,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:58,571 INFO L225 Difference]: With dead ends: 12867 [2023-11-24 23:22:58,571 INFO L226 Difference]: Without dead ends: 10041 [2023-11-24 23:22:58,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-11-24 23:22:58,578 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 690 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:58,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 1048 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:22:58,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10041 states. [2023-11-24 23:22:58,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10041 to 5975. [2023-11-24 23:22:58,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5975 states, 5974 states have (on average 1.2785403414797456) internal successors, (7638), 5974 states have internal predecessors, (7638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5975 states to 5975 states and 7638 transitions. [2023-11-24 23:22:58,727 INFO L78 Accepts]: Start accepts. Automaton has 5975 states and 7638 transitions. Word has length 76 [2023-11-24 23:22:58,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:58,727 INFO L495 AbstractCegarLoop]: Abstraction has 5975 states and 7638 transitions. [2023-11-24 23:22:58,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:58,728 INFO L276 IsEmpty]: Start isEmpty. Operand 5975 states and 7638 transitions. [2023-11-24 23:22:58,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-24 23:22:58,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:58,732 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] [2023-11-24 23:22:58,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-11-24 23:22:58,733 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:58,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:58,734 INFO L85 PathProgramCache]: Analyzing trace with hash 959582828, now seen corresponding path program 1 times [2023-11-24 23:22:58,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:58,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942584130] [2023-11-24 23:22:58,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:58,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 23:22:59,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:59,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942584130] [2023-11-24 23:22:59,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942584130] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:59,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:59,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:22:59,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314563761] [2023-11-24 23:22:59,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:59,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:22:59,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:59,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:22:59,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:22:59,022 INFO L87 Difference]: Start difference. First operand 5975 states and 7638 transitions. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:59,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:59,701 INFO L93 Difference]: Finished difference Result 13226 states and 16882 transitions. [2023-11-24 23:22:59,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 23:22:59,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-11-24 23:22:59,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:59,712 INFO L225 Difference]: With dead ends: 13226 [2023-11-24 23:22:59,712 INFO L226 Difference]: Without dead ends: 10806 [2023-11-24 23:22:59,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-11-24 23:22:59,717 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 922 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:59,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 891 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:22:59,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10806 states. [2023-11-24 23:22:59,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10806 to 5889. [2023-11-24 23:22:59,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5889 states, 5888 states have (on average 1.2797214673913044) internal successors, (7535), 5888 states have internal predecessors, (7535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:59,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5889 states to 5889 states and 7535 transitions. [2023-11-24 23:22:59,836 INFO L78 Accepts]: Start accepts. Automaton has 5889 states and 7535 transitions. Word has length 76 [2023-11-24 23:22:59,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:59,836 INFO L495 AbstractCegarLoop]: Abstraction has 5889 states and 7535 transitions. [2023-11-24 23:22:59,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:22:59,837 INFO L276 IsEmpty]: Start isEmpty. Operand 5889 states and 7535 transitions. [2023-11-24 23:22:59,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-24 23:22:59,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:59,840 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] [2023-11-24 23:22:59,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-11-24 23:22:59,841 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-24 23:22:59,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:59,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1357844593, now seen corresponding path program 1 times [2023-11-24 23:22:59,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:59,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792259956] [2023-11-24 23:22:59,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:59,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:23:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:23:00,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:23:00,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792259956] [2023-11-24 23:23:00,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792259956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:23:00,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128254224] [2023-11-24 23:23:00,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:23:00,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:23:00,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:23:00,830 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:23:00,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c548e33a-f3cd-4c06-94aa-0b67649225e1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:23:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:23:01,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-24 23:23:01,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:23:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:23:02,719 INFO L327 TraceCheckSpWp]: Computing backward predicates...