./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64123235-9132-4098-b0ac-85b31d49b58b/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64123235-9132-4098-b0ac-85b31d49b58b/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64123235-9132-4098-b0ac-85b31d49b58b/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64123235-9132-4098-b0ac-85b31d49b58b/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64123235-9132-4098-b0ac-85b31d49b58b/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64123235-9132-4098-b0ac-85b31d49b58b/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d9dc4c1afb888b23c0ebc469c8090d62842d0a0c5570d5e56681453b5bd49afb --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 06:44:14,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:44:15,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:44:15,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:44:15,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:44:15,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:44:15,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:44:15,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:44:15,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:44:15,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:44:15,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:44:15,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:44:15,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:44:15,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:44:15,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:44:15,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:44:15,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:44:15,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:44:15,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:44:15,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:44:15,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:44:15,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:44:15,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:44:15,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:44:15,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:44:15,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:44:15,099 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:44:15,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:44:15,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:44:15,101 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:44:15,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:44:15,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:44:15,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:44:15,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:44:15,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:44:15,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:44:15,113 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:44:15,113 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:44:15,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:44:15,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:44:15,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:44:15,116 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64123235-9132-4098-b0ac-85b31d49b58b/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:44:15,169 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:44:15,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:44:15,170 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:44:15,170 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:44:15,171 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:44:15,172 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:44:15,172 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:44:15,172 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:44:15,172 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:44:15,172 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:44:15,174 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:44:15,174 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:44:15,174 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:44:15,174 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:44:15,175 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:44:15,175 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:44:15,175 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:44:15,175 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:44:15,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:44:15,176 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:44:15,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:44:15,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:44:15,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:44:15,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:44:15,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:44:15,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:44:15,179 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:44:15,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:44:15,180 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:44:15,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:44:15,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:44:15,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:44:15,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:44:15,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:44:15,181 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:44:15,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:44:15,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:44:15,182 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:44:15,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:44:15,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:44:15,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:44:15,183 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64123235-9132-4098-b0ac-85b31d49b58b/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64123235-9132-4098-b0ac-85b31d49b58b/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9dc4c1afb888b23c0ebc469c8090d62842d0a0c5570d5e56681453b5bd49afb [2022-11-19 06:44:15,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:44:15,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:44:15,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:44:15,526 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:44:15,527 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:44:15,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64123235-9132-4098-b0ac-85b31d49b58b/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2022-11-19 06:44:15,619 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64123235-9132-4098-b0ac-85b31d49b58b/bin/utaipan-I9t0OCRTmS/data/370e9ab97/d52d25bba5e4474599f9936e97468959/FLAG5d301a1ed [2022-11-19 06:44:16,346 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:44:16,347 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64123235-9132-4098-b0ac-85b31d49b58b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2022-11-19 06:44:16,363 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64123235-9132-4098-b0ac-85b31d49b58b/bin/utaipan-I9t0OCRTmS/data/370e9ab97/d52d25bba5e4474599f9936e97468959/FLAG5d301a1ed [2022-11-19 06:44:16,586 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64123235-9132-4098-b0ac-85b31d49b58b/bin/utaipan-I9t0OCRTmS/data/370e9ab97/d52d25bba5e4474599f9936e97468959 [2022-11-19 06:44:16,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:44:16,590 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:44:16,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:44:16,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:44:16,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:44:16,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:44:16" (1/1) ... [2022-11-19 06:44:16,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16f930ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:16, skipping insertion in model container [2022-11-19 06:44:16,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:44:16" (1/1) ... [2022-11-19 06:44:16,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:44:16,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:44:17,128 WARN L234 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_64123235-9132-4098-b0ac-85b31d49b58b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c[15364,15377] [2022-11-19 06:44:17,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:44:17,312 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:44:17,453 WARN L234 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_64123235-9132-4098-b0ac-85b31d49b58b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c[15364,15377] [2022-11-19 06:44:17,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:44:17,561 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:44:17,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:17 WrapperNode [2022-11-19 06:44:17,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:44:17,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:44:17,563 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:44:17,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:44:17,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:17" (1/1) ... [2022-11-19 06:44:17,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:17" (1/1) ... [2022-11-19 06:44:17,666 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1589 [2022-11-19 06:44:17,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:44:17,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:44:17,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:44:17,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:44:17,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:17" (1/1) ... [2022-11-19 06:44:17,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:17" (1/1) ... [2022-11-19 06:44:17,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:17" (1/1) ... [2022-11-19 06:44:17,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:17" (1/1) ... [2022-11-19 06:44:17,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:17" (1/1) ... [2022-11-19 06:44:17,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:17" (1/1) ... [2022-11-19 06:44:17,768 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:17" (1/1) ... [2022-11-19 06:44:17,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:17" (1/1) ... [2022-11-19 06:44:17,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:44:17,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:44:17,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:44:17,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:44:17,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:17" (1/1) ... [2022-11-19 06:44:17,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:44:17,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64123235-9132-4098-b0ac-85b31d49b58b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:17,846 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64123235-9132-4098-b0ac-85b31d49b58b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:44:17,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64123235-9132-4098-b0ac-85b31d49b58b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:44:17,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:44:17,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:44:17,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:44:17,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:44:18,194 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:44:18,197 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:44:19,892 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:44:20,947 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:44:20,947 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 06:44:20,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:44:20 BoogieIcfgContainer [2022-11-19 06:44:20,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:44:20,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:44:20,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:44:20,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:44:20,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:44:16" (1/3) ... [2022-11-19 06:44:20,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5731054b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:44:20, skipping insertion in model container [2022-11-19 06:44:20,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:44:17" (2/3) ... [2022-11-19 06:44:20,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5731054b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:44:20, skipping insertion in model container [2022-11-19 06:44:20,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:44:20" (3/3) ... [2022-11-19 06:44:20,966 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2022-11-19 06:44:20,989 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:44:20,990 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:44:21,087 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:44:21,105 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@26f62f7a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:44:21,106 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:44:21,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 307 states, 305 states have (on average 1.544262295081967) internal successors, (471), 306 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:21,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 06:44:21,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:21,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:21,143 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:21,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:21,152 INFO L85 PathProgramCache]: Analyzing trace with hash 44850494, now seen corresponding path program 1 times [2022-11-19 06:44:21,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:21,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473532941] [2022-11-19 06:44:21,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:21,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:22,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:22,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473532941] [2022-11-19 06:44:22,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473532941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:22,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:22,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:44:22,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537784757] [2022-11-19 06:44:22,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:22,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:44:22,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:22,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:44:22,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:44:22,470 INFO L87 Difference]: Start difference. First operand has 307 states, 305 states have (on average 1.544262295081967) internal successors, (471), 306 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 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) [2022-11-19 06:44:22,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:22,822 INFO L93 Difference]: Finished difference Result 826 states and 1265 transitions. [2022-11-19 06:44:22,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:44:22,825 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 [2022-11-19 06:44:22,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:22,842 INFO L225 Difference]: With dead ends: 826 [2022-11-19 06:44:22,842 INFO L226 Difference]: Without dead ends: 600 [2022-11-19 06:44:22,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:44:22,851 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 435 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:22,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 1076 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:44:22,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-11-19 06:44:22,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 580. [2022-11-19 06:44:22,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 1.5146804835924006) internal successors, (877), 579 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 877 transitions. [2022-11-19 06:44:22,943 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 877 transitions. Word has length 60 [2022-11-19 06:44:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:22,943 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 877 transitions. [2022-11-19 06:44:22,944 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) [2022-11-19 06:44:22,944 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 877 transitions. [2022-11-19 06:44:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 06:44:22,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:22,948 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] [2022-11-19 06:44:22,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:44:22,949 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:22,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:22,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1965698749, now seen corresponding path program 1 times [2022-11-19 06:44:22,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:22,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540131725] [2022-11-19 06:44:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:22,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:23,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:23,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540131725] [2022-11-19 06:44:23,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540131725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:23,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:23,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:44:23,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134669493] [2022-11-19 06:44:23,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:23,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:44:23,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:23,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:44:23,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:44:23,516 INFO L87 Difference]: Start difference. First operand 580 states and 877 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) [2022-11-19 06:44:23,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:23,796 INFO L93 Difference]: Finished difference Result 1524 states and 2305 transitions. [2022-11-19 06:44:23,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:44:23,797 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 [2022-11-19 06:44:23,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:23,804 INFO L225 Difference]: With dead ends: 1524 [2022-11-19 06:44:23,804 INFO L226 Difference]: Without dead ends: 1124 [2022-11-19 06:44:23,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:44:23,817 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 406 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:23,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 853 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:44:23,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-11-19 06:44:23,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1056. [2022-11-19 06:44:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 1.5080568720379146) internal successors, (1591), 1055 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:23,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1591 transitions. [2022-11-19 06:44:23,893 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1591 transitions. Word has length 64 [2022-11-19 06:44:23,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:23,894 INFO L495 AbstractCegarLoop]: Abstraction has 1056 states and 1591 transitions. [2022-11-19 06:44:23,894 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) [2022-11-19 06:44:23,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1591 transitions. [2022-11-19 06:44:23,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 06:44:23,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:23,898 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] [2022-11-19 06:44:23,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:44:23,899 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:23,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:23,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1409411808, now seen corresponding path program 1 times [2022-11-19 06:44:23,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:23,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619016742] [2022-11-19 06:44:23,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:23,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:24,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:24,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619016742] [2022-11-19 06:44:24,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619016742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:24,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:24,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:44:24,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587918370] [2022-11-19 06:44:24,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:24,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:44:24,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:24,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:44:24,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:44:24,368 INFO L87 Difference]: Start difference. First operand 1056 states and 1591 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:24,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:24,598 INFO L93 Difference]: Finished difference Result 2726 states and 4105 transitions. [2022-11-19 06:44:24,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:44:24,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2022-11-19 06:44:24,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:24,608 INFO L225 Difference]: With dead ends: 2726 [2022-11-19 06:44:24,608 INFO L226 Difference]: Without dead ends: 2024 [2022-11-19 06:44:24,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:44:24,618 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 386 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:24,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 853 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:44:24,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2022-11-19 06:44:24,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1890. [2022-11-19 06:44:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 1.498676548438327) internal successors, (2831), 1889 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:24,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2831 transitions. [2022-11-19 06:44:24,744 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2831 transitions. Word has length 70 [2022-11-19 06:44:24,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:24,744 INFO L495 AbstractCegarLoop]: Abstraction has 1890 states and 2831 transitions. [2022-11-19 06:44:24,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:24,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2831 transitions. [2022-11-19 06:44:24,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 06:44:24,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:24,750 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, 1, 1] [2022-11-19 06:44:24,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:44:24,750 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:24,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:24,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1767834111, now seen corresponding path program 1 times [2022-11-19 06:44:24,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:24,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440890253] [2022-11-19 06:44:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:24,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:25,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:25,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440890253] [2022-11-19 06:44:25,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440890253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:25,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:25,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:44:25,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909190286] [2022-11-19 06:44:25,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:25,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:44:25,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:25,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:44:25,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:44:25,144 INFO L87 Difference]: Start difference. First operand 1890 states and 2831 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:25,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:25,489 INFO L93 Difference]: Finished difference Result 4798 states and 7177 transitions. [2022-11-19 06:44:25,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:44:25,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 [2022-11-19 06:44:25,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:25,504 INFO L225 Difference]: With dead ends: 4798 [2022-11-19 06:44:25,504 INFO L226 Difference]: Without dead ends: 3588 [2022-11-19 06:44:25,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:44:25,513 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 366 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:25,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 853 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:44:25,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2022-11-19 06:44:25,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 3322. [2022-11-19 06:44:25,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 3321 states have (on average 1.4859981933152664) internal successors, (4935), 3321 states have internal predecessors, (4935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:25,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 4935 transitions. [2022-11-19 06:44:25,744 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 4935 transitions. Word has length 76 [2022-11-19 06:44:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:25,744 INFO L495 AbstractCegarLoop]: Abstraction has 3322 states and 4935 transitions. [2022-11-19 06:44:25,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:25,745 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 4935 transitions. [2022-11-19 06:44:25,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-19 06:44:25,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:25,754 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:25,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:44:25,755 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:25,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:25,755 INFO L85 PathProgramCache]: Analyzing trace with hash 853541978, now seen corresponding path program 1 times [2022-11-19 06:44:25,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:25,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333774541] [2022-11-19 06:44:25,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:25,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:26,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:26,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333774541] [2022-11-19 06:44:26,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333774541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:26,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:26,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:44:26,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936511335] [2022-11-19 06:44:26,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:26,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:44:26,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:26,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:44:26,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:44:26,559 INFO L87 Difference]: Start difference. First operand 3322 states and 4935 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:27,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:27,007 INFO L93 Difference]: Finished difference Result 5554 states and 8249 transitions. [2022-11-19 06:44:27,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:44:27,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2022-11-19 06:44:27,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:27,018 INFO L225 Difference]: With dead ends: 5554 [2022-11-19 06:44:27,018 INFO L226 Difference]: Without dead ends: 2993 [2022-11-19 06:44:27,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:44:27,022 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 347 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:27,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 1201 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:44:27,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2022-11-19 06:44:27,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2991. [2022-11-19 06:44:27,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 1.48561872909699) internal successors, (4442), 2990 states have internal predecessors, (4442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:27,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 4442 transitions. [2022-11-19 06:44:27,239 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 4442 transitions. Word has length 82 [2022-11-19 06:44:27,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:27,239 INFO L495 AbstractCegarLoop]: Abstraction has 2991 states and 4442 transitions. [2022-11-19 06:44:27,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:27,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 4442 transitions. [2022-11-19 06:44:27,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-19 06:44:27,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:27,246 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:27,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:44:27,247 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:27,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:27,247 INFO L85 PathProgramCache]: Analyzing trace with hash -83572149, now seen corresponding path program 1 times [2022-11-19 06:44:27,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:27,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207772027] [2022-11-19 06:44:27,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:27,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:28,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:28,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207772027] [2022-11-19 06:44:28,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207772027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:28,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:28,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:44:28,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692372537] [2022-11-19 06:44:28,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:28,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:44:28,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:28,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:44:28,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:44:28,789 INFO L87 Difference]: Start difference. First operand 2991 states and 4442 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:29,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:29,535 INFO L93 Difference]: Finished difference Result 7459 states and 11036 transitions. [2022-11-19 06:44:29,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:44:29,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2022-11-19 06:44:29,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:29,554 INFO L225 Difference]: With dead ends: 7459 [2022-11-19 06:44:29,554 INFO L226 Difference]: Without dead ends: 4673 [2022-11-19 06:44:29,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:44:29,562 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 353 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:29,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 1092 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:44:29,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4673 states. [2022-11-19 06:44:30,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4673 to 4671. [2022-11-19 06:44:30,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 4670 states have (on average 1.470235546038544) internal successors, (6866), 4670 states have internal predecessors, (6866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:30,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 6866 transitions. [2022-11-19 06:44:30,078 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 6866 transitions. Word has length 82 [2022-11-19 06:44:30,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:30,079 INFO L495 AbstractCegarLoop]: Abstraction has 4671 states and 6866 transitions. [2022-11-19 06:44:30,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 6866 transitions. [2022-11-19 06:44:30,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 06:44:30,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:30,099 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:30,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 06:44:30,099 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:30,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:30,100 INFO L85 PathProgramCache]: Analyzing trace with hash 683747427, now seen corresponding path program 1 times [2022-11-19 06:44:30,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:30,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728088221] [2022-11-19 06:44:30,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:30,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:30,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:30,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728088221] [2022-11-19 06:44:30,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728088221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:30,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:30,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:44:30,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693895384] [2022-11-19 06:44:30,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:30,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:44:30,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:30,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:44:30,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:44:30,421 INFO L87 Difference]: Start difference. First operand 4671 states and 6866 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:31,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:31,415 INFO L93 Difference]: Finished difference Result 12331 states and 18068 transitions. [2022-11-19 06:44:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:44:31,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2022-11-19 06:44:31,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:31,452 INFO L225 Difference]: With dead ends: 12331 [2022-11-19 06:44:31,452 INFO L226 Difference]: Without dead ends: 9033 [2022-11-19 06:44:31,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:44:31,459 INFO L413 NwaCegarLoop]: 536 mSDtfsCounter, 328 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:31,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 960 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:44:31,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9033 states. [2022-11-19 06:44:32,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9033 to 7975. [2022-11-19 06:44:32,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7975 states, 7974 states have (on average 1.4469525959367946) internal successors, (11538), 7974 states have internal predecessors, (11538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:32,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7975 states to 7975 states and 11538 transitions. [2022-11-19 06:44:32,510 INFO L78 Accepts]: Start accepts. Automaton has 7975 states and 11538 transitions. Word has length 88 [2022-11-19 06:44:32,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:32,510 INFO L495 AbstractCegarLoop]: Abstraction has 7975 states and 11538 transitions. [2022-11-19 06:44:32,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:32,511 INFO L276 IsEmpty]: Start isEmpty. Operand 7975 states and 11538 transitions. [2022-11-19 06:44:32,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-19 06:44:32,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:32,535 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:32,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 06:44:32,536 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:32,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:32,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1650017335, now seen corresponding path program 1 times [2022-11-19 06:44:32,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:32,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541129406] [2022-11-19 06:44:32,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:32,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:34,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:34,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541129406] [2022-11-19 06:44:34,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541129406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:34,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:34,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:44:34,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877115276] [2022-11-19 06:44:34,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:34,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:44:34,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:34,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:44:34,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:44:34,102 INFO L87 Difference]: Start difference. First operand 7975 states and 11538 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:34,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:34,981 INFO L93 Difference]: Finished difference Result 12971 states and 18772 transitions. [2022-11-19 06:44:34,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:44:34,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-19 06:44:34,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:35,024 INFO L225 Difference]: With dead ends: 12971 [2022-11-19 06:44:35,025 INFO L226 Difference]: Without dead ends: 7265 [2022-11-19 06:44:35,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:44:35,088 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 681 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:35,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 692 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:44:35,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7265 states. [2022-11-19 06:44:35,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7265 to 7263. [2022-11-19 06:44:35,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7263 states, 7262 states have (on average 1.446708895621041) internal successors, (10506), 7262 states have internal predecessors, (10506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:35,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7263 states to 7263 states and 10506 transitions. [2022-11-19 06:44:35,919 INFO L78 Accepts]: Start accepts. Automaton has 7263 states and 10506 transitions. Word has length 94 [2022-11-19 06:44:35,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:35,922 INFO L495 AbstractCegarLoop]: Abstraction has 7263 states and 10506 transitions. [2022-11-19 06:44:35,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:35,923 INFO L276 IsEmpty]: Start isEmpty. Operand 7263 states and 10506 transitions. [2022-11-19 06:44:35,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-19 06:44:35,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:35,943 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:35,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 06:44:35,943 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:35,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:35,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1209962627, now seen corresponding path program 1 times [2022-11-19 06:44:35,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:35,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94821903] [2022-11-19 06:44:35,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:35,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:36,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:36,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94821903] [2022-11-19 06:44:36,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94821903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:36,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:36,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 06:44:36,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543461398] [2022-11-19 06:44:36,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:36,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 06:44:36,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:36,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 06:44:36,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:44:36,553 INFO L87 Difference]: Start difference. First operand 7263 states and 10506 transitions. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:42,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:42,987 INFO L93 Difference]: Finished difference Result 42315 states and 60608 transitions. [2022-11-19 06:44:42,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 06:44:42,987 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-19 06:44:42,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:43,090 INFO L225 Difference]: With dead ends: 42315 [2022-11-19 06:44:43,090 INFO L226 Difference]: Without dead ends: 35603 [2022-11-19 06:44:43,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:44:43,106 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 2934 mSDsluCounter, 2057 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2934 SdHoareTripleChecker+Valid, 2819 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:43,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2934 Valid, 2819 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 06:44:43,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35603 states. [2022-11-19 06:44:48,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35603 to 35593. [2022-11-19 06:44:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35593 states, 35592 states have (on average 1.4271184535850754) internal successors, (50794), 35592 states have internal predecessors, (50794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35593 states to 35593 states and 50794 transitions. [2022-11-19 06:44:48,711 INFO L78 Accepts]: Start accepts. Automaton has 35593 states and 50794 transitions. Word has length 94 [2022-11-19 06:44:48,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:48,711 INFO L495 AbstractCegarLoop]: Abstraction has 35593 states and 50794 transitions. [2022-11-19 06:44:48,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:48,712 INFO L276 IsEmpty]: Start isEmpty. Operand 35593 states and 50794 transitions. [2022-11-19 06:44:48,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-19 06:44:48,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:48,785 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:48,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 06:44:48,786 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:48,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:48,786 INFO L85 PathProgramCache]: Analyzing trace with hash 236398355, now seen corresponding path program 1 times [2022-11-19 06:44:48,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:48,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476340971] [2022-11-19 06:44:48,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:48,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:49,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:49,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476340971] [2022-11-19 06:44:49,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476340971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:49,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:44:49,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:44:49,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929765631] [2022-11-19 06:44:49,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:49,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:44:49,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:49,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:44:49,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:44:49,362 INFO L87 Difference]: Start difference. First operand 35593 states and 50794 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:54,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:54,969 INFO L93 Difference]: Finished difference Result 66031 states and 94434 transitions. [2022-11-19 06:44:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:44:54,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-19 06:44:54,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:55,059 INFO L225 Difference]: With dead ends: 66031 [2022-11-19 06:44:55,059 INFO L226 Difference]: Without dead ends: 34945 [2022-11-19 06:44:55,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:44:55,093 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 353 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:55,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 1206 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:44:55,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34945 states. [2022-11-19 06:45:00,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34945 to 34943. [2022-11-19 06:45:00,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34943 states, 34942 states have (on average 1.427880487665274) internal successors, (49893), 34942 states have internal predecessors, (49893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:00,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34943 states to 34943 states and 49893 transitions. [2022-11-19 06:45:00,540 INFO L78 Accepts]: Start accepts. Automaton has 34943 states and 49893 transitions. Word has length 94 [2022-11-19 06:45:00,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:45:00,541 INFO L495 AbstractCegarLoop]: Abstraction has 34943 states and 49893 transitions. [2022-11-19 06:45:00,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:00,542 INFO L276 IsEmpty]: Start isEmpty. Operand 34943 states and 49893 transitions. [2022-11-19 06:45:00,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-19 06:45:00,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:45:00,616 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:45:00,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 06:45:00,617 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:45:00,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:45:00,618 INFO L85 PathProgramCache]: Analyzing trace with hash -806550049, now seen corresponding path program 1 times [2022-11-19 06:45:00,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:45:00,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504642817] [2022-11-19 06:45:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:45:00,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:45:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:45:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:45:00,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:45:00,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504642817] [2022-11-19 06:45:00,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504642817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:45:00,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:45:00,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:45:00,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479416213] [2022-11-19 06:45:00,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:45:00,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:45:00,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:45:00,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:45:00,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:45:00,747 INFO L87 Difference]: Start difference. First operand 34943 states and 49893 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:08,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:45:08,470 INFO L93 Difference]: Finished difference Result 78885 states and 112408 transitions. [2022-11-19 06:45:08,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:45:08,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-11-19 06:45:08,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:45:08,622 INFO L225 Difference]: With dead ends: 78885 [2022-11-19 06:45:08,623 INFO L226 Difference]: Without dead ends: 57857 [2022-11-19 06:45:08,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:45:08,666 INFO L413 NwaCegarLoop]: 786 mSDtfsCounter, 356 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:45:08,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 1186 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:45:08,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57857 states.