./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c1efdd-c692-47fe-aa99-1a22008cea0b/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c1efdd-c692-47fe-aa99-1a22008cea0b/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c1efdd-c692-47fe-aa99-1a22008cea0b/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c1efdd-c692-47fe-aa99-1a22008cea0b/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c1efdd-c692-47fe-aa99-1a22008cea0b/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c1efdd-c692-47fe-aa99-1a22008cea0b/bin/utaipan-UbGMyvGFUs --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 6a475a1757f9d6a7e4fb14b3de484172261c724bb5d3b2a10ee5c8f5de9de51b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:20:27,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:20:27,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:20:27,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:20:27,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:20:27,103 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:20:27,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:20:27,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:20:27,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:20:27,121 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:20:27,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:20:27,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:20:27,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:20:27,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:20:27,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:20:27,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:20:27,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:20:27,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:20:27,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:20:27,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:20:27,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:20:27,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:20:27,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:20:27,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:20:27,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:20:27,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:20:27,183 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:20:27,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:20:27,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:20:27,189 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:20:27,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:20:27,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:20:27,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:20:27,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:20:27,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:20:27,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:20:27,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:20:27,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:20:27,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:20:27,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:20:27,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:20:27,204 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c1efdd-c692-47fe-aa99-1a22008cea0b/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:20:27,258 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:20:27,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:20:27,261 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:20:27,261 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:20:27,261 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:20:27,262 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:20:27,262 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:20:27,262 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:20:27,263 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:20:27,263 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:20:27,271 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:20:27,272 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:20:27,272 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:20:27,272 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:20:27,273 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:20:27,273 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:20:27,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:20:27,275 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:20:27,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:20:27,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:20:27,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:20:27,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:20:27,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:20:27,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:20:27,277 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:20:27,277 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:20:27,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:20:27,278 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:20:27,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:20:27,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:20:27,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:20:27,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:20:27,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:20:27,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:20:27,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:20:27,283 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:20:27,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:20:27,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:20:27,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:20:27,284 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:20:27,284 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c1efdd-c692-47fe-aa99-1a22008cea0b/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c1efdd-c692-47fe-aa99-1a22008cea0b/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a475a1757f9d6a7e4fb14b3de484172261c724bb5d3b2a10ee5c8f5de9de51b [2021-11-19 13:20:27,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:20:27,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:20:27,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:20:27,631 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:20:27,632 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:20:27,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c1efdd-c692-47fe-aa99-1a22008cea0b/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-19 13:20:27,739 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c1efdd-c692-47fe-aa99-1a22008cea0b/bin/utaipan-UbGMyvGFUs/data/c27482c08/47c0862e50174bc38db25174bea97d8e/FLAG49ad235d5 [2021-11-19 13:20:28,379 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:20:28,380 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c1efdd-c692-47fe-aa99-1a22008cea0b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-19 13:20:28,401 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c1efdd-c692-47fe-aa99-1a22008cea0b/bin/utaipan-UbGMyvGFUs/data/c27482c08/47c0862e50174bc38db25174bea97d8e/FLAG49ad235d5 [2021-11-19 13:20:28,648 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c1efdd-c692-47fe-aa99-1a22008cea0b/bin/utaipan-UbGMyvGFUs/data/c27482c08/47c0862e50174bc38db25174bea97d8e [2021-11-19 13:20:28,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:20:28,653 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:20:28,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:20:28,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:20:28,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:20:28,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:20:28" (1/1) ... [2021-11-19 13:20:28,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58e2e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:28, skipping insertion in model container [2021-11-19 13:20:28,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:20:28" (1/1) ... [2021-11-19 13:20:28,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:20:28,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:20:29,060 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c1efdd-c692-47fe-aa99-1a22008cea0b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8609,8622] [2021-11-19 13:20:29,163 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:20:29,188 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:20:29,378 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c1efdd-c692-47fe-aa99-1a22008cea0b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8609,8622] [2021-11-19 13:20:29,461 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:20:29,482 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:20:29,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29 WrapperNode [2021-11-19 13:20:29,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:20:29,485 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:20:29,485 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:20:29,485 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:20:29,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,580 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 779 [2021-11-19 13:20:29,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:20:29,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:20:29,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:20:29,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:20:29,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:20:29,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:20:29,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:20:29,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:20:29,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:20:29,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c1efdd-c692-47fe-aa99-1a22008cea0b/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:20:29,721 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c1efdd-c692-47fe-aa99-1a22008cea0b/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:20:29,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c1efdd-c692-47fe-aa99-1a22008cea0b/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:20:29,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:20:29,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 13:20:29,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:20:29,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:20:29,961 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:20:29,963 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:20:30,925 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:20:31,141 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:20:31,142 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 13:20:31,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:20:31 BoogieIcfgContainer [2021-11-19 13:20:31,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:20:31,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:20:31,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:20:31,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:20:31,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:20:28" (1/3) ... [2021-11-19 13:20:31,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29dd514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:20:31, skipping insertion in model container [2021-11-19 13:20:31,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (2/3) ... [2021-11-19 13:20:31,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29dd514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:20:31, skipping insertion in model container [2021-11-19 13:20:31,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:20:31" (3/3) ... [2021-11-19 13:20:31,157 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-19 13:20:31,164 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:20:31,164 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:20:31,227 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:20:31,237 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:20:31,237 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:20:31,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 156 states, 154 states have (on average 1.7077922077922079) internal successors, (263), 155 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:31,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 13:20:31,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:31,274 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:20:31,275 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:31,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:31,282 INFO L85 PathProgramCache]: Analyzing trace with hash 2115966095, now seen corresponding path program 1 times [2021-11-19 13:20:31,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:31,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4776431] [2021-11-19 13:20:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:31,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:32,063 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:32,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4776431] [2021-11-19 13:20:32,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4776431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:32,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:32,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 13:20:32,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64975253] [2021-11-19 13:20:32,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:32,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:20:32,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:32,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:20:32,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:20:32,119 INFO L87 Difference]: Start difference. First operand has 156 states, 154 states have (on average 1.7077922077922079) internal successors, (263), 155 states have internal predecessors, (263), 0 states have call successors, (0), 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 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:32,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:32,796 INFO L93 Difference]: Finished difference Result 548 states and 877 transitions. [2021-11-19 13:20:32,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:20:32,814 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-19 13:20:32,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:32,834 INFO L225 Difference]: With dead ends: 548 [2021-11-19 13:20:32,835 INFO L226 Difference]: Without dead ends: 456 [2021-11-19 13:20:32,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:20:32,843 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 1078 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:32,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1078 Valid, 1040 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:20:32,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-11-19 13:20:33,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 448. [2021-11-19 13:20:33,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.395973154362416) internal successors, (624), 447 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:33,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 624 transitions. [2021-11-19 13:20:33,062 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 624 transitions. Word has length 67 [2021-11-19 13:20:33,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:33,067 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 624 transitions. [2021-11-19 13:20:33,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:33,068 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 624 transitions. [2021-11-19 13:20:33,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 13:20:33,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:33,074 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:20:33,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 13:20:33,075 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:33,076 INFO L85 PathProgramCache]: Analyzing trace with hash 2065085458, now seen corresponding path program 1 times [2021-11-19 13:20:33,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:33,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749905771] [2021-11-19 13:20:33,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:33,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:33,276 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:33,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749905771] [2021-11-19 13:20:33,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749905771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:33,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:33,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:20:33,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863396283] [2021-11-19 13:20:33,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:33,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:20:33,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:33,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:20:33,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:20:33,281 INFO L87 Difference]: Start difference. First operand 448 states and 624 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:33,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:33,706 INFO L93 Difference]: Finished difference Result 1099 states and 1573 transitions. [2021-11-19 13:20:33,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:20:33,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-19 13:20:33,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:33,719 INFO L225 Difference]: With dead ends: 1099 [2021-11-19 13:20:33,719 INFO L226 Difference]: Without dead ends: 705 [2021-11-19 13:20:33,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:20:33,735 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 543 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:33,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 217 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:20:33,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-11-19 13:20:33,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 703. [2021-11-19 13:20:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 1.4245014245014245) internal successors, (1000), 702 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:33,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1000 transitions. [2021-11-19 13:20:33,882 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1000 transitions. Word has length 68 [2021-11-19 13:20:33,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:33,882 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1000 transitions. [2021-11-19 13:20:33,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:33,883 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1000 transitions. [2021-11-19 13:20:33,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 13:20:33,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:33,894 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:20:33,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 13:20:33,895 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:33,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:33,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1961664863, now seen corresponding path program 1 times [2021-11-19 13:20:33,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:33,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084358245] [2021-11-19 13:20:33,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:33,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:34,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:34,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084358245] [2021-11-19 13:20:34,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084358245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:34,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:34,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:20:34,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183999307] [2021-11-19 13:20:34,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:34,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:20:34,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:34,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:20:34,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:20:34,109 INFO L87 Difference]: Start difference. First operand 703 states and 1000 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:34,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:34,540 INFO L93 Difference]: Finished difference Result 1841 states and 2674 transitions. [2021-11-19 13:20:34,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:20:34,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-19 13:20:34,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:34,553 INFO L225 Difference]: With dead ends: 1841 [2021-11-19 13:20:34,554 INFO L226 Difference]: Without dead ends: 1215 [2021-11-19 13:20:34,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:20:34,565 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 526 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:34,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 225 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:20:34,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2021-11-19 13:20:34,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1213. [2021-11-19 13:20:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 1.4422442244224423) internal successors, (1748), 1212 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1748 transitions. [2021-11-19 13:20:34,707 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1748 transitions. Word has length 68 [2021-11-19 13:20:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:34,708 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 1748 transitions. [2021-11-19 13:20:34,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:34,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1748 transitions. [2021-11-19 13:20:34,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 13:20:34,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:34,718 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:20:34,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 13:20:34,719 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:34,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:34,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1513878913, now seen corresponding path program 1 times [2021-11-19 13:20:34,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:34,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208576731] [2021-11-19 13:20:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:34,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:34,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:34,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208576731] [2021-11-19 13:20:34,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208576731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:34,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:34,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:20:34,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93740683] [2021-11-19 13:20:34,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:34,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:20:34,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:34,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:20:34,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:20:34,875 INFO L87 Difference]: Start difference. First operand 1213 states and 1748 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:35,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:35,393 INFO L93 Difference]: Finished difference Result 3307 states and 4836 transitions. [2021-11-19 13:20:35,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:20:35,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-19 13:20:35,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:35,411 INFO L225 Difference]: With dead ends: 3307 [2021-11-19 13:20:35,411 INFO L226 Difference]: Without dead ends: 2235 [2021-11-19 13:20:35,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:20:35,426 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 533 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:35,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 234 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:20:35,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2021-11-19 13:20:35,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 2233. [2021-11-19 13:20:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 1.4520609318996416) internal successors, (3241), 2232 states have internal predecessors, (3241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:35,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 3241 transitions. [2021-11-19 13:20:35,718 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 3241 transitions. Word has length 68 [2021-11-19 13:20:35,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:35,721 INFO L470 AbstractCegarLoop]: Abstraction has 2233 states and 3241 transitions. [2021-11-19 13:20:35,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 3241 transitions. [2021-11-19 13:20:35,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 13:20:35,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:35,723 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:20:35,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 13:20:35,723 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:35,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:35,727 INFO L85 PathProgramCache]: Analyzing trace with hash 721353584, now seen corresponding path program 1 times [2021-11-19 13:20:35,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:35,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918169340] [2021-11-19 13:20:35,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:35,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:35,860 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:35,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918169340] [2021-11-19 13:20:35,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918169340] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:35,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:35,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:20:35,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473921739] [2021-11-19 13:20:35,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:35,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:20:35,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:35,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:20:35,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:20:35,865 INFO L87 Difference]: Start difference. First operand 2233 states and 3241 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:36,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:36,576 INFO L93 Difference]: Finished difference Result 6401 states and 9367 transitions. [2021-11-19 13:20:36,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:20:36,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-19 13:20:36,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:36,610 INFO L225 Difference]: With dead ends: 6401 [2021-11-19 13:20:36,610 INFO L226 Difference]: Without dead ends: 4275 [2021-11-19 13:20:36,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:20:36,616 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 503 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:36,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 233 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:20:36,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2021-11-19 13:20:37,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 4273. [2021-11-19 13:20:37,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4273 states, 4272 states have (on average 1.452247191011236) internal successors, (6204), 4272 states have internal predecessors, (6204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:37,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4273 states to 4273 states and 6204 transitions. [2021-11-19 13:20:37,148 INFO L78 Accepts]: Start accepts. Automaton has 4273 states and 6204 transitions. Word has length 68 [2021-11-19 13:20:37,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:37,149 INFO L470 AbstractCegarLoop]: Abstraction has 4273 states and 6204 transitions. [2021-11-19 13:20:37,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:37,150 INFO L276 IsEmpty]: Start isEmpty. Operand 4273 states and 6204 transitions. [2021-11-19 13:20:37,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 13:20:37,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:37,152 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:20:37,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 13:20:37,152 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:37,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:37,153 INFO L85 PathProgramCache]: Analyzing trace with hash -375681849, now seen corresponding path program 1 times [2021-11-19 13:20:37,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:37,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682425109] [2021-11-19 13:20:37,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:37,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:37,240 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:37,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682425109] [2021-11-19 13:20:37,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682425109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:37,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:37,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:20:37,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509815315] [2021-11-19 13:20:37,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:37,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:20:37,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:37,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:20:37,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:20:37,248 INFO L87 Difference]: Start difference. First operand 4273 states and 6204 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:37,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:37,950 INFO L93 Difference]: Finished difference Result 8483 states and 12337 transitions. [2021-11-19 13:20:37,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:20:37,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-19 13:20:37,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:37,985 INFO L225 Difference]: With dead ends: 8483 [2021-11-19 13:20:37,985 INFO L226 Difference]: Without dead ends: 4273 [2021-11-19 13:20:37,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:20:37,995 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 437 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:37,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 168 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:20:38,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4273 states. [2021-11-19 13:20:38,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4273 to 4273. [2021-11-19 13:20:38,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4273 states, 4272 states have (on average 1.4520131086142323) internal successors, (6203), 4272 states have internal predecessors, (6203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:38,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4273 states to 4273 states and 6203 transitions. [2021-11-19 13:20:38,554 INFO L78 Accepts]: Start accepts. Automaton has 4273 states and 6203 transitions. Word has length 69 [2021-11-19 13:20:38,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:38,555 INFO L470 AbstractCegarLoop]: Abstraction has 4273 states and 6203 transitions. [2021-11-19 13:20:38,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 4273 states and 6203 transitions. [2021-11-19 13:20:38,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 13:20:38,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:38,560 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:20:38,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 13:20:38,561 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:38,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:38,563 INFO L85 PathProgramCache]: Analyzing trace with hash -377227069, now seen corresponding path program 1 times [2021-11-19 13:20:38,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:38,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744201092] [2021-11-19 13:20:38,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:38,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:39,915 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:39,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744201092] [2021-11-19 13:20:39,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744201092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:39,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:39,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 13:20:39,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568736855] [2021-11-19 13:20:39,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:39,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 13:20:39,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:39,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 13:20:39,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:20:39,918 INFO L87 Difference]: Start difference. First operand 4273 states and 6203 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:42,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:42,936 INFO L93 Difference]: Finished difference Result 10579 states and 15350 transitions. [2021-11-19 13:20:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 13:20:42,937 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-19 13:20:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:42,989 INFO L225 Difference]: With dead ends: 10579 [2021-11-19 13:20:42,989 INFO L226 Difference]: Without dead ends: 7969 [2021-11-19 13:20:42,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=311, Invalid=879, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 13:20:42,999 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 1092 mSDsluCounter, 1694 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1092 SdHoareTripleChecker+Valid, 1900 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:42,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1092 Valid, 1900 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 13:20:43,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7969 states. [2021-11-19 13:20:43,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7969 to 5843. [2021-11-19 13:20:43,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5843 states, 5842 states have (on average 1.437692571037316) internal successors, (8399), 5842 states have internal predecessors, (8399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:43,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5843 states to 5843 states and 8399 transitions. [2021-11-19 13:20:43,936 INFO L78 Accepts]: Start accepts. Automaton has 5843 states and 8399 transitions. Word has length 69 [2021-11-19 13:20:43,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:43,937 INFO L470 AbstractCegarLoop]: Abstraction has 5843 states and 8399 transitions. [2021-11-19 13:20:43,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:43,938 INFO L276 IsEmpty]: Start isEmpty. Operand 5843 states and 8399 transitions. [2021-11-19 13:20:43,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 13:20:43,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:43,944 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:20:43,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 13:20:43,944 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:43,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:43,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1840534691, now seen corresponding path program 1 times [2021-11-19 13:20:43,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:43,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458290711] [2021-11-19 13:20:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:43,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:44,983 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:44,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458290711] [2021-11-19 13:20:44,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458290711] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:44,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:44,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-19 13:20:44,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605558480] [2021-11-19 13:20:44,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:44,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 13:20:44,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:44,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 13:20:44,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:20:44,987 INFO L87 Difference]: Start difference. First operand 5843 states and 8399 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:47,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:47,339 INFO L93 Difference]: Finished difference Result 9944 states and 14312 transitions. [2021-11-19 13:20:47,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 13:20:47,340 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-19 13:20:47,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:47,399 INFO L225 Difference]: With dead ends: 9944 [2021-11-19 13:20:47,399 INFO L226 Difference]: Without dead ends: 9942 [2021-11-19 13:20:47,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2021-11-19 13:20:47,406 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 1153 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:47,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 1454 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:20:47,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9942 states. [2021-11-19 13:20:48,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9942 to 8060. [2021-11-19 13:20:48,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8060 states, 8059 states have (on average 1.4371510112917236) internal successors, (11582), 8059 states have internal predecessors, (11582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8060 states to 8060 states and 11582 transitions. [2021-11-19 13:20:48,514 INFO L78 Accepts]: Start accepts. Automaton has 8060 states and 11582 transitions. Word has length 69 [2021-11-19 13:20:48,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:48,515 INFO L470 AbstractCegarLoop]: Abstraction has 8060 states and 11582 transitions. [2021-11-19 13:20:48,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:48,518 INFO L276 IsEmpty]: Start isEmpty. Operand 8060 states and 11582 transitions. [2021-11-19 13:20:48,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 13:20:48,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:48,520 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:20:48,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 13:20:48,521 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:48,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:48,522 INFO L85 PathProgramCache]: Analyzing trace with hash 12510307, now seen corresponding path program 1 times [2021-11-19 13:20:48,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:48,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449504477] [2021-11-19 13:20:48,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:48,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:49,443 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:49,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449504477] [2021-11-19 13:20:49,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449504477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:49,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:49,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-19 13:20:49,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887627671] [2021-11-19 13:20:49,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:49,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 13:20:49,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:49,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 13:20:49,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:20:49,445 INFO L87 Difference]: Start difference. First operand 8060 states and 11582 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:51,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:51,894 INFO L93 Difference]: Finished difference Result 9874 states and 14142 transitions. [2021-11-19 13:20:51,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 13:20:51,895 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-19 13:20:51,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:51,927 INFO L225 Difference]: With dead ends: 9874 [2021-11-19 13:20:51,927 INFO L226 Difference]: Without dead ends: 9872 [2021-11-19 13:20:51,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2021-11-19 13:20:51,932 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 1354 mSDsluCounter, 1852 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 2121 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:51,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1354 Valid, 2121 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:20:51,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9872 states. [2021-11-19 13:20:52,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9872 to 8082. [2021-11-19 13:20:52,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8082 states, 8081 states have (on average 1.4364558841727508) internal successors, (11608), 8081 states have internal predecessors, (11608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:52,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8082 states to 8082 states and 11608 transitions. [2021-11-19 13:20:52,964 INFO L78 Accepts]: Start accepts. Automaton has 8082 states and 11608 transitions. Word has length 69 [2021-11-19 13:20:52,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:52,965 INFO L470 AbstractCegarLoop]: Abstraction has 8082 states and 11608 transitions. [2021-11-19 13:20:52,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:52,965 INFO L276 IsEmpty]: Start isEmpty. Operand 8082 states and 11608 transitions. [2021-11-19 13:20:52,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 13:20:52,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:52,968 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:20:52,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 13:20:52,968 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:52,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:52,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1160251261, now seen corresponding path program 1 times [2021-11-19 13:20:52,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:52,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672011135] [2021-11-19 13:20:52,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:52,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:53,805 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:53,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672011135] [2021-11-19 13:20:53,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672011135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:53,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:53,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-19 13:20:53,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214485206] [2021-11-19 13:20:53,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:53,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 13:20:53,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:53,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 13:20:53,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:20:53,808 INFO L87 Difference]: Start difference. First operand 8082 states and 11608 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:55,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:55,790 INFO L93 Difference]: Finished difference Result 10830 states and 15545 transitions. [2021-11-19 13:20:55,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 13:20:55,793 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-19 13:20:55,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:55,821 INFO L225 Difference]: With dead ends: 10830 [2021-11-19 13:20:55,822 INFO L226 Difference]: Without dead ends: 9884 [2021-11-19 13:20:55,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-11-19 13:20:55,828 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 1037 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:55,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1037 Valid, 1576 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:20:55,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9884 states. [2021-11-19 13:20:56,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9884 to 8946. [2021-11-19 13:20:56,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8946 states, 8945 states have (on average 1.4352152040245947) internal successors, (12838), 8945 states have internal predecessors, (12838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:56,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8946 states to 8946 states and 12838 transitions. [2021-11-19 13:20:56,624 INFO L78 Accepts]: Start accepts. Automaton has 8946 states and 12838 transitions. Word has length 69 [2021-11-19 13:20:56,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:56,625 INFO L470 AbstractCegarLoop]: Abstraction has 8946 states and 12838 transitions. [2021-11-19 13:20:56,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:56,625 INFO L276 IsEmpty]: Start isEmpty. Operand 8946 states and 12838 transitions. [2021-11-19 13:20:56,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 13:20:56,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:56,628 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:20:56,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 13:20:56,628 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:56,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:56,629 INFO L85 PathProgramCache]: Analyzing trace with hash -259263393, now seen corresponding path program 1 times [2021-11-19 13:20:56,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:56,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520407300] [2021-11-19 13:20:56,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:56,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:57,470 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:57,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520407300] [2021-11-19 13:20:57,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520407300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:57,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:57,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 13:20:57,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859292786] [2021-11-19 13:20:57,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:57,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 13:20:57,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:57,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 13:20:57,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:20:57,474 INFO L87 Difference]: Start difference. First operand 8946 states and 12838 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 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) [2021-11-19 13:20:59,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:59,900 INFO L93 Difference]: Finished difference Result 18226 states and 26286 transitions. [2021-11-19 13:20:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 13:20:59,901 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 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 [2021-11-19 13:20:59,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:59,945 INFO L225 Difference]: With dead ends: 18226 [2021-11-19 13:20:59,945 INFO L226 Difference]: Without dead ends: 14608 [2021-11-19 13:20:59,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=329, Invalid=931, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 13:20:59,956 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 1111 mSDsluCounter, 2092 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 2366 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:59,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1111 Valid, 2366 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 13:20:59,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14608 states. [2021-11-19 13:21:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14608 to 10830. [2021-11-19 13:21:01,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10830 states, 10829 states have (on average 1.4275556376396712) internal successors, (15459), 10829 states have internal predecessors, (15459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:01,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10830 states to 10830 states and 15459 transitions. [2021-11-19 13:21:01,129 INFO L78 Accepts]: Start accepts. Automaton has 10830 states and 15459 transitions. Word has length 70 [2021-11-19 13:21:01,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:21:01,130 INFO L470 AbstractCegarLoop]: Abstraction has 10830 states and 15459 transitions. [2021-11-19 13:21:01,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 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) [2021-11-19 13:21:01,130 INFO L276 IsEmpty]: Start isEmpty. Operand 10830 states and 15459 transitions. [2021-11-19 13:21:01,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 13:21:01,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:21:01,133 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:21:01,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 13:21:01,134 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:21:01,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:21:01,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1821312041, now seen corresponding path program 1 times [2021-11-19 13:21:01,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:21:01,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238565455] [2021-11-19 13:21:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:21:01,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:21:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:21:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:21:02,347 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:21:02,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238565455] [2021-11-19 13:21:02,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238565455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:21:02,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:21:02,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 13:21:02,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869421598] [2021-11-19 13:21:02,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:21:02,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 13:21:02,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:21:02,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 13:21:02,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:21:02,351 INFO L87 Difference]: Start difference. First operand 10830 states and 15459 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:05,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:21:05,549 INFO L93 Difference]: Finished difference Result 16656 states and 23827 transitions. [2021-11-19 13:21:05,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 13:21:05,549 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-19 13:21:05,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:21:05,591 INFO L225 Difference]: With dead ends: 16656 [2021-11-19 13:21:05,591 INFO L226 Difference]: Without dead ends: 14846 [2021-11-19 13:21:05,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=311, Invalid=879, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 13:21:05,601 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 974 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:21:05,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [974 Valid, 1755 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:21:05,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14846 states. [2021-11-19 13:21:06,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14846 to 10830. [2021-11-19 13:21:06,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10830 states, 10829 states have (on average 1.4275556376396712) internal successors, (15459), 10829 states have internal predecessors, (15459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:06,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10830 states to 10830 states and 15459 transitions. [2021-11-19 13:21:06,729 INFO L78 Accepts]: Start accepts. Automaton has 10830 states and 15459 transitions. Word has length 71 [2021-11-19 13:21:06,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:21:06,729 INFO L470 AbstractCegarLoop]: Abstraction has 10830 states and 15459 transitions. [2021-11-19 13:21:06,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:06,730 INFO L276 IsEmpty]: Start isEmpty. Operand 10830 states and 15459 transitions. [2021-11-19 13:21:06,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 13:21:06,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:21:06,732 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:21:06,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 13:21:06,732 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:21:06,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:21:06,732 INFO L85 PathProgramCache]: Analyzing trace with hash 645630871, now seen corresponding path program 1 times [2021-11-19 13:21:06,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:21:06,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107878195] [2021-11-19 13:21:06,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:21:06,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:21:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:21:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:21:07,874 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:21:07,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107878195] [2021-11-19 13:21:07,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107878195] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:21:07,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:21:07,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 13:21:07,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720888879] [2021-11-19 13:21:07,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:21:07,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 13:21:07,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:21:07,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 13:21:07,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-19 13:21:07,877 INFO L87 Difference]: Start difference. First operand 10830 states and 15459 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:10,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:21:11,000 INFO L93 Difference]: Finished difference Result 12645 states and 18018 transitions. [2021-11-19 13:21:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 13:21:11,000 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-19 13:21:11,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:21:11,026 INFO L225 Difference]: With dead ends: 12645 [2021-11-19 13:21:11,026 INFO L226 Difference]: Without dead ends: 12643 [2021-11-19 13:21:11,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=322, Invalid=1160, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 13:21:11,032 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 1421 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 1912 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1421 SdHoareTripleChecker+Valid, 1716 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:21:11,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1421 Valid, 1716 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1912 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 13:21:11,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12643 states. [2021-11-19 13:21:12,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12643 to 10832. [2021-11-19 13:21:12,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10832 states, 10831 states have (on average 1.4274766872864926) internal successors, (15461), 10831 states have internal predecessors, (15461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10832 states to 10832 states and 15461 transitions. [2021-11-19 13:21:12,080 INFO L78 Accepts]: Start accepts. Automaton has 10832 states and 15461 transitions. Word has length 71 [2021-11-19 13:21:12,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:21:12,081 INFO L470 AbstractCegarLoop]: Abstraction has 10832 states and 15461 transitions. [2021-11-19 13:21:12,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:12,081 INFO L276 IsEmpty]: Start isEmpty. Operand 10832 states and 15461 transitions. [2021-11-19 13:21:12,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 13:21:12,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:21:12,083 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:21:12,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 13:21:12,084 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:21:12,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:21:12,085 INFO L85 PathProgramCache]: Analyzing trace with hash -527130697, now seen corresponding path program 1 times [2021-11-19 13:21:12,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:21:12,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875805207] [2021-11-19 13:21:12,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:21:12,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:21:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:21:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:21:13,654 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:21:13,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875805207] [2021-11-19 13:21:13,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875805207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:21:13,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:21:13,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-19 13:21:13,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846764583] [2021-11-19 13:21:13,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:21:13,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 13:21:13,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:21:13,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 13:21:13,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-11-19 13:21:13,658 INFO L87 Difference]: Start difference. First operand 10832 states and 15461 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:17,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:21:17,805 INFO L93 Difference]: Finished difference Result 14851 states and 21207 transitions. [2021-11-19 13:21:17,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 13:21:17,806 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-19 13:21:17,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:21:17,840 INFO L225 Difference]: With dead ends: 14851 [2021-11-19 13:21:17,840 INFO L226 Difference]: Without dead ends: 13921 [2021-11-19 13:21:17,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2021-11-19 13:21:17,850 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 1419 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 2215 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1419 SdHoareTripleChecker+Valid, 1834 SdHoareTripleChecker+Invalid, 2255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:21:17,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1419 Valid, 1834 Invalid, 2255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2215 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 13:21:17,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13921 states. [2021-11-19 13:21:19,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13921 to 11289. [2021-11-19 13:21:19,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11289 states, 11288 states have (on average 1.4279766123316797) internal successors, (16119), 11288 states have internal predecessors, (16119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11289 states to 11289 states and 16119 transitions. [2021-11-19 13:21:19,157 INFO L78 Accepts]: Start accepts. Automaton has 11289 states and 16119 transitions. Word has length 71 [2021-11-19 13:21:19,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:21:19,157 INFO L470 AbstractCegarLoop]: Abstraction has 11289 states and 16119 transitions. [2021-11-19 13:21:19,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:19,158 INFO L276 IsEmpty]: Start isEmpty. Operand 11289 states and 16119 transitions. [2021-11-19 13:21:19,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 13:21:19,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:21:19,160 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:21:19,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 13:21:19,161 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:21:19,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:21:19,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1610903415, now seen corresponding path program 1 times [2021-11-19 13:21:19,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:21:19,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307872326] [2021-11-19 13:21:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:21:19,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:21:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:21:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:21:20,096 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:21:20,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307872326] [2021-11-19 13:21:20,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307872326] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:21:20,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:21:20,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 13:21:20,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670171236] [2021-11-19 13:21:20,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:21:20,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 13:21:20,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:21:20,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 13:21:20,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:21:20,099 INFO L87 Difference]: Start difference. First operand 11289 states and 16119 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:22,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:21:22,942 INFO L93 Difference]: Finished difference Result 17074 states and 24382 transitions. [2021-11-19 13:21:22,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 13:21:22,943 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-19 13:21:22,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:21:22,968 INFO L225 Difference]: With dead ends: 17074 [2021-11-19 13:21:22,968 INFO L226 Difference]: Without dead ends: 17072 [2021-11-19 13:21:22,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2021-11-19 13:21:22,975 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 1105 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 2049 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:21:22,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1105 Valid, 2049 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:21:22,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17072 states. [2021-11-19 13:21:24,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17072 to 12146. [2021-11-19 13:21:24,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12146 states, 12145 states have (on average 1.4288184438040346) internal successors, (17353), 12145 states have internal predecessors, (17353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12146 states to 12146 states and 17353 transitions. [2021-11-19 13:21:24,346 INFO L78 Accepts]: Start accepts. Automaton has 12146 states and 17353 transitions. Word has length 71 [2021-11-19 13:21:24,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:21:24,347 INFO L470 AbstractCegarLoop]: Abstraction has 12146 states and 17353 transitions. [2021-11-19 13:21:24,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:24,347 INFO L276 IsEmpty]: Start isEmpty. Operand 12146 states and 17353 transitions. [2021-11-19 13:21:24,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 13:21:24,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:21:24,349 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:21:24,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 13:21:24,350 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:21:24,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:21:24,350 INFO L85 PathProgramCache]: Analyzing trace with hash 438141847, now seen corresponding path program 1 times [2021-11-19 13:21:24,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:21:24,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762649057] [2021-11-19 13:21:24,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:21:24,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:21:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:21:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:21:25,238 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:21:25,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762649057] [2021-11-19 13:21:25,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762649057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:21:25,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:21:25,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 13:21:25,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068079371] [2021-11-19 13:21:25,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:21:25,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 13:21:25,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:21:25,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 13:21:25,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:21:25,242 INFO L87 Difference]: Start difference. First operand 12146 states and 17353 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:27,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:21:27,631 INFO L93 Difference]: Finished difference Result 14935 states and 21338 transitions. [2021-11-19 13:21:27,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 13:21:27,632 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-19 13:21:27,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:21:27,654 INFO L225 Difference]: With dead ends: 14935 [2021-11-19 13:21:27,654 INFO L226 Difference]: Without dead ends: 13989 [2021-11-19 13:21:27,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2021-11-19 13:21:27,659 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 766 mSDsluCounter, 2511 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 2812 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:21:27,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 2812 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 13:21:27,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13989 states. [2021-11-19 13:21:29,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13989 to 12149. [2021-11-19 13:21:29,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12149 states, 12148 states have (on average 1.4287125452749423) internal successors, (17356), 12148 states have internal predecessors, (17356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:29,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12149 states to 12149 states and 17356 transitions. [2021-11-19 13:21:29,102 INFO L78 Accepts]: Start accepts. Automaton has 12149 states and 17356 transitions. Word has length 71 [2021-11-19 13:21:29,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:21:29,103 INFO L470 AbstractCegarLoop]: Abstraction has 12149 states and 17356 transitions. [2021-11-19 13:21:29,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:29,103 INFO L276 IsEmpty]: Start isEmpty. Operand 12149 states and 17356 transitions. [2021-11-19 13:21:29,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 13:21:29,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:21:29,106 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:21:29,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 13:21:29,106 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:21:29,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:21:29,107 INFO L85 PathProgramCache]: Analyzing trace with hash -221340841, now seen corresponding path program 1 times [2021-11-19 13:21:29,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:21:29,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561955949] [2021-11-19 13:21:29,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:21:29,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:21:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:21:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:21:30,195 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:21:30,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561955949] [2021-11-19 13:21:30,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561955949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:21:30,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:21:30,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-19 13:21:30,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883019095] [2021-11-19 13:21:30,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:21:30,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 13:21:30,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:21:30,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 13:21:30,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:21:30,197 INFO L87 Difference]: Start difference. First operand 12149 states and 17356 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:33,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:21:33,704 INFO L93 Difference]: Finished difference Result 14870 states and 21212 transitions. [2021-11-19 13:21:33,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 13:21:33,704 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-19 13:21:33,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:21:33,727 INFO L225 Difference]: With dead ends: 14870 [2021-11-19 13:21:33,727 INFO L226 Difference]: Without dead ends: 14868 [2021-11-19 13:21:33,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-11-19 13:21:33,734 INFO L933 BasicCegarLoop]: 386 mSDtfsCounter, 815 mSDsluCounter, 3111 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 3475 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:21:33,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 3475 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 13:21:33,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14868 states. [2021-11-19 13:21:35,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14868 to 12641. [2021-11-19 13:21:35,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12641 states, 12640 states have (on average 1.4274525316455695) internal successors, (18043), 12640 states have internal predecessors, (18043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:35,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12641 states to 12641 states and 18043 transitions. [2021-11-19 13:21:35,102 INFO L78 Accepts]: Start accepts. Automaton has 12641 states and 18043 transitions. Word has length 71 [2021-11-19 13:21:35,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:21:35,102 INFO L470 AbstractCegarLoop]: Abstraction has 12641 states and 18043 transitions. [2021-11-19 13:21:35,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 12641 states and 18043 transitions. [2021-11-19 13:21:35,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-19 13:21:35,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:21:35,105 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:21:35,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 13:21:35,106 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:21:35,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:21:35,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1949836435, now seen corresponding path program 1 times [2021-11-19 13:21:35,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:21:35,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033463844] [2021-11-19 13:21:35,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:21:35,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:21:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:21:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:21:36,051 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:21:36,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033463844] [2021-11-19 13:21:36,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033463844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:21:36,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:21:36,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 13:21:36,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680152848] [2021-11-19 13:21:36,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:21:36,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 13:21:36,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:21:36,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 13:21:36,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:21:36,053 INFO L87 Difference]: Start difference. First operand 12641 states and 18043 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:21:39,083 INFO L93 Difference]: Finished difference Result 18977 states and 27223 transitions. [2021-11-19 13:21:39,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 13:21:39,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-19 13:21:39,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:21:39,113 INFO L225 Difference]: With dead ends: 18977 [2021-11-19 13:21:39,113 INFO L226 Difference]: Without dead ends: 16367 [2021-11-19 13:21:39,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=353, Invalid=979, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 13:21:39,123 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 820 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 1251 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:21:39,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 1251 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:21:39,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16367 states. [2021-11-19 13:21:40,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16367 to 12634. [2021-11-19 13:21:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12634 states, 12633 states have (on average 1.4275310694213568) internal successors, (18034), 12633 states have internal predecessors, (18034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:40,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12634 states to 12634 states and 18034 transitions. [2021-11-19 13:21:40,614 INFO L78 Accepts]: Start accepts. Automaton has 12634 states and 18034 transitions. Word has length 72 [2021-11-19 13:21:40,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:21:40,614 INFO L470 AbstractCegarLoop]: Abstraction has 12634 states and 18034 transitions. [2021-11-19 13:21:40,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:40,615 INFO L276 IsEmpty]: Start isEmpty. Operand 12634 states and 18034 transitions. [2021-11-19 13:21:40,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-19 13:21:40,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:21:40,617 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:21:40,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 13:21:40,618 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:21:40,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:21:40,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1955393485, now seen corresponding path program 1 times [2021-11-19 13:21:40,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:21:40,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561185739] [2021-11-19 13:21:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:21:40,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:21:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:21:41,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:21:41,686 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:21:41,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561185739] [2021-11-19 13:21:41,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561185739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:21:41,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:21:41,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 13:21:41,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611146451] [2021-11-19 13:21:41,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:21:41,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 13:21:41,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:21:41,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 13:21:41,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:21:41,689 INFO L87 Difference]: Start difference. First operand 12634 states and 18034 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:21:45,845 INFO L93 Difference]: Finished difference Result 23121 states and 33091 transitions. [2021-11-19 13:21:45,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 13:21:45,846 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-19 13:21:45,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:21:45,883 INFO L225 Difference]: With dead ends: 23121 [2021-11-19 13:21:45,884 INFO L226 Difference]: Without dead ends: 23119 [2021-11-19 13:21:45,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 13:21:45,892 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 1071 mSDsluCounter, 2369 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 2694 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:21:45,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 2694 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:21:45,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23119 states. [2021-11-19 13:21:47,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23119 to 14546. [2021-11-19 13:21:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14546 states, 14545 states have (on average 1.431007218975593) internal successors, (20814), 14545 states have internal predecessors, (20814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:47,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14546 states to 14546 states and 20814 transitions. [2021-11-19 13:21:47,637 INFO L78 Accepts]: Start accepts. Automaton has 14546 states and 20814 transitions. Word has length 72 [2021-11-19 13:21:47,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:21:47,638 INFO L470 AbstractCegarLoop]: Abstraction has 14546 states and 20814 transitions. [2021-11-19 13:21:47,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:47,638 INFO L276 IsEmpty]: Start isEmpty. Operand 14546 states and 20814 transitions. [2021-11-19 13:21:47,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-19 13:21:47,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:21:47,640 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:21:47,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 13:21:47,641 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:21:47,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:21:47,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1166812243, now seen corresponding path program 1 times [2021-11-19 13:21:47,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:21:47,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835040171] [2021-11-19 13:21:47,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:21:47,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:21:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:21:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:21:48,794 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:21:48,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835040171] [2021-11-19 13:21:48,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835040171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:21:48,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:21:48,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 13:21:48,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126235820] [2021-11-19 13:21:48,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:21:48,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 13:21:48,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:21:48,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 13:21:48,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:21:48,801 INFO L87 Difference]: Start difference. First operand 14546 states and 20814 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:53,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:21:53,261 INFO L93 Difference]: Finished difference Result 18190 states and 26021 transitions. [2021-11-19 13:21:53,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 13:21:53,261 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-19 13:21:53,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:21:53,290 INFO L225 Difference]: With dead ends: 18190 [2021-11-19 13:21:53,290 INFO L226 Difference]: Without dead ends: 17244 [2021-11-19 13:21:53,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2021-11-19 13:21:53,298 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 1084 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 2079 SdHoareTripleChecker+Invalid, 2480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:21:53,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1084 Valid, 2079 Invalid, 2480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2455 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 13:21:53,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17244 states. [2021-11-19 13:21:55,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17244 to 14549. [2021-11-19 13:21:55,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14549 states, 14548 states have (on average 1.4309870772614792) internal successors, (20818), 14548 states have internal predecessors, (20818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:55,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14549 states to 14549 states and 20818 transitions. [2021-11-19 13:21:55,061 INFO L78 Accepts]: Start accepts. Automaton has 14549 states and 20818 transitions. Word has length 72 [2021-11-19 13:21:55,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:21:55,061 INFO L470 AbstractCegarLoop]: Abstraction has 14549 states and 20818 transitions. [2021-11-19 13:21:55,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:55,061 INFO L276 IsEmpty]: Start isEmpty. Operand 14549 states and 20818 transitions. [2021-11-19 13:21:55,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-19 13:21:55,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:21:55,064 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:21:55,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 13:21:55,064 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:21:55,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:21:55,065 INFO L85 PathProgramCache]: Analyzing trace with hash -342100848, now seen corresponding path program 1 times [2021-11-19 13:21:55,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:21:55,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548272544] [2021-11-19 13:21:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:21:55,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:21:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:21:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:21:55,105 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:21:55,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548272544] [2021-11-19 13:21:55,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548272544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:21:55,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:21:55,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:21:55,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379414787] [2021-11-19 13:21:55,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:21:55,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:21:55,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:21:55,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:21:55,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:21:55,108 INFO L87 Difference]: Start difference. First operand 14549 states and 20818 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:56,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:21:56,590 INFO L93 Difference]: Finished difference Result 25420 states and 36435 transitions. [2021-11-19 13:21:56,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:21:56,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-19 13:21:56,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:21:56,609 INFO L225 Difference]: With dead ends: 25420 [2021-11-19 13:21:56,610 INFO L226 Difference]: Without dead ends: 11674 [2021-11-19 13:21:56,627 INFO L932 BasicCegarLoop]: 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 [2021-11-19 13:21:56,628 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 128 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:21:56,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 344 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:21:56,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11674 states. [2021-11-19 13:21:58,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11674 to 11458. [2021-11-19 13:21:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11458 states, 11457 states have (on average 1.4243693811643536) internal successors, (16319), 11457 states have internal predecessors, (16319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:58,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11458 states to 11458 states and 16319 transitions. [2021-11-19 13:21:58,128 INFO L78 Accepts]: Start accepts. Automaton has 11458 states and 16319 transitions. Word has length 72 [2021-11-19 13:21:58,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:21:58,129 INFO L470 AbstractCegarLoop]: Abstraction has 11458 states and 16319 transitions. [2021-11-19 13:21:58,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:58,129 INFO L276 IsEmpty]: Start isEmpty. Operand 11458 states and 16319 transitions. [2021-11-19 13:21:58,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 13:21:58,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:21:58,130 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:21:58,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-19 13:21:58,130 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:21:58,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:21:58,131 INFO L85 PathProgramCache]: Analyzing trace with hash 2034671389, now seen corresponding path program 1 times [2021-11-19 13:21:58,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:21:58,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804462452] [2021-11-19 13:21:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:21:58,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:21:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:21:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:21:58,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:21:58,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804462452] [2021-11-19 13:21:58,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804462452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:21:58,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:21:58,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:21:58,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43033215] [2021-11-19 13:21:58,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:21:58,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:21:58,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:21:58,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:21:58,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:21:58,170 INFO L87 Difference]: Start difference. First operand 11458 states and 16319 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:59,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:21:59,596 INFO L93 Difference]: Finished difference Result 19785 states and 28303 transitions. [2021-11-19 13:21:59,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:21:59,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-19 13:21:59,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:21:59,615 INFO L225 Difference]: With dead ends: 19785 [2021-11-19 13:21:59,615 INFO L226 Difference]: Without dead ends: 11046 [2021-11-19 13:21:59,628 INFO L932 BasicCegarLoop]: 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 [2021-11-19 13:21:59,629 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 131 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:21:59,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 338 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:21:59,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11046 states. [2021-11-19 13:22:01,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11046 to 11044. [2021-11-19 13:22:01,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11044 states, 11043 states have (on average 1.4226206646744544) internal successors, (15710), 11043 states have internal predecessors, (15710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:01,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11044 states to 11044 states and 15710 transitions. [2021-11-19 13:22:01,037 INFO L78 Accepts]: Start accepts. Automaton has 11044 states and 15710 transitions. Word has length 73 [2021-11-19 13:22:01,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:22:01,037 INFO L470 AbstractCegarLoop]: Abstraction has 11044 states and 15710 transitions. [2021-11-19 13:22:01,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand 11044 states and 15710 transitions. [2021-11-19 13:22:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 13:22:01,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:22:01,039 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:22:01,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-19 13:22:01,040 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:22:01,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:22:01,040 INFO L85 PathProgramCache]: Analyzing trace with hash 154409387, now seen corresponding path program 1 times [2021-11-19 13:22:01,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:22:01,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279662759] [2021-11-19 13:22:01,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:22:01,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:22:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:22:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:02,267 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:22:02,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279662759] [2021-11-19 13:22:02,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279662759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:22:02,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:22:02,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 13:22:02,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592307958] [2021-11-19 13:22:02,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:22:02,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 13:22:02,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:22:02,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 13:22:02,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-11-19 13:22:02,269 INFO L87 Difference]: Start difference. First operand 11044 states and 15710 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:05,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:22:05,685 INFO L93 Difference]: Finished difference Result 13698 states and 19450 transitions. [2021-11-19 13:22:05,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 13:22:05,686 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-19 13:22:05,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:22:05,706 INFO L225 Difference]: With dead ends: 13698 [2021-11-19 13:22:05,706 INFO L226 Difference]: Without dead ends: 13696 [2021-11-19 13:22:05,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=332, Invalid=1228, Unknown=0, NotChecked=0, Total=1560 [2021-11-19 13:22:05,713 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 1180 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1180 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:22:05,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1180 Valid, 1490 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 13:22:05,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13696 states. [2021-11-19 13:22:07,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13696 to 11037. [2021-11-19 13:22:07,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11037 states, 11036 states have (on average 1.4227075027183762) internal successors, (15701), 11036 states have internal predecessors, (15701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:07,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11037 states to 11037 states and 15701 transitions. [2021-11-19 13:22:07,123 INFO L78 Accepts]: Start accepts. Automaton has 11037 states and 15701 transitions. Word has length 73 [2021-11-19 13:22:07,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:22:07,124 INFO L470 AbstractCegarLoop]: Abstraction has 11037 states and 15701 transitions. [2021-11-19 13:22:07,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:07,124 INFO L276 IsEmpty]: Start isEmpty. Operand 11037 states and 15701 transitions. [2021-11-19 13:22:07,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 13:22:07,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:22:07,125 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:22:07,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-19 13:22:07,126 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:22:07,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:22:07,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1018352181, now seen corresponding path program 1 times [2021-11-19 13:22:07,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:22:07,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11958915] [2021-11-19 13:22:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:22:07,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:22:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:22:09,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:09,995 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:22:09,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11958915] [2021-11-19 13:22:09,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11958915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:22:09,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:22:09,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-11-19 13:22:09,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568153109] [2021-11-19 13:22:09,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:22:09,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-19 13:22:09,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:22:09,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-19 13:22:09,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-11-19 13:22:09,997 INFO L87 Difference]: Start difference. First operand 11037 states and 15701 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:17,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:22:17,836 INFO L93 Difference]: Finished difference Result 13726 states and 19523 transitions. [2021-11-19 13:22:17,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 13:22:17,837 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-19 13:22:17,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:22:17,854 INFO L225 Difference]: With dead ends: 13726 [2021-11-19 13:22:17,854 INFO L226 Difference]: Without dead ends: 12812 [2021-11-19 13:22:17,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=660, Invalid=2310, Unknown=0, NotChecked=0, Total=2970 [2021-11-19 13:22:17,860 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 1349 mSDsluCounter, 3106 mSDsCounter, 0 mSdLazyCounter, 1836 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1349 SdHoareTripleChecker+Valid, 3393 SdHoareTripleChecker+Invalid, 1884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:22:17,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1349 Valid, 3393 Invalid, 1884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1836 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 13:22:17,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12812 states. [2021-11-19 13:22:19,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12812 to 11037. [2021-11-19 13:22:19,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11037 states, 11036 states have (on average 1.4227075027183762) internal successors, (15701), 11036 states have internal predecessors, (15701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11037 states to 11037 states and 15701 transitions. [2021-11-19 13:22:19,118 INFO L78 Accepts]: Start accepts. Automaton has 11037 states and 15701 transitions. Word has length 73 [2021-11-19 13:22:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:22:19,119 INFO L470 AbstractCegarLoop]: Abstraction has 11037 states and 15701 transitions. [2021-11-19 13:22:19,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:19,119 INFO L276 IsEmpty]: Start isEmpty. Operand 11037 states and 15701 transitions. [2021-11-19 13:22:19,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 13:22:19,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:22:19,121 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:22:19,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-19 13:22:19,121 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:22:19,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:22:19,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1677834869, now seen corresponding path program 1 times [2021-11-19 13:22:19,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:22:19,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020669554] [2021-11-19 13:22:19,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:22:19,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:22:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:22:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:20,370 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:22:20,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020669554] [2021-11-19 13:22:20,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020669554] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:22:20,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:22:20,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 13:22:20,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083158431] [2021-11-19 13:22:20,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:22:20,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 13:22:20,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:22:20,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 13:22:20,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-11-19 13:22:20,373 INFO L87 Difference]: Start difference. First operand 11037 states and 15701 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:24,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:22:24,566 INFO L93 Difference]: Finished difference Result 13673 states and 19423 transitions. [2021-11-19 13:22:24,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 13:22:24,566 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-19 13:22:24,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:22:24,587 INFO L225 Difference]: With dead ends: 13673 [2021-11-19 13:22:24,587 INFO L226 Difference]: Without dead ends: 13671 [2021-11-19 13:22:24,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=417, Invalid=1475, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 13:22:24,593 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 1121 mSDsluCounter, 1850 mSDsCounter, 0 mSdLazyCounter, 2512 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 2085 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:22:24,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1121 Valid, 2085 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2512 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 13:22:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13671 states. [2021-11-19 13:22:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13671 to 11037. [2021-11-19 13:22:26,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11037 states, 11036 states have (on average 1.4227075027183762) internal successors, (15701), 11036 states have internal predecessors, (15701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:26,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11037 states to 11037 states and 15701 transitions. [2021-11-19 13:22:26,047 INFO L78 Accepts]: Start accepts. Automaton has 11037 states and 15701 transitions. Word has length 73 [2021-11-19 13:22:26,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:22:26,048 INFO L470 AbstractCegarLoop]: Abstraction has 11037 states and 15701 transitions. [2021-11-19 13:22:26,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:26,048 INFO L276 IsEmpty]: Start isEmpty. Operand 11037 states and 15701 transitions. [2021-11-19 13:22:26,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 13:22:26,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:22:26,049 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:22:26,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-19 13:22:26,049 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:22:26,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:22:26,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1763856021, now seen corresponding path program 1 times [2021-11-19 13:22:26,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:22:26,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357674767] [2021-11-19 13:22:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:22:26,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:22:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:22:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:28,487 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:22:28,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357674767] [2021-11-19 13:22:28,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357674767] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:22:28,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:22:28,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-11-19 13:22:28,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32757010] [2021-11-19 13:22:28,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:22:28,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 13:22:28,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:22:28,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 13:22:28,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-11-19 13:22:28,490 INFO L87 Difference]: Start difference. First operand 11037 states and 15701 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:35,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:22:35,277 INFO L93 Difference]: Finished difference Result 12808 states and 18183 transitions. [2021-11-19 13:22:35,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 13:22:35,278 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-19 13:22:35,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:22:35,295 INFO L225 Difference]: With dead ends: 12808 [2021-11-19 13:22:35,295 INFO L226 Difference]: Without dead ends: 12806 [2021-11-19 13:22:35,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=639, Invalid=2013, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 13:22:35,299 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 988 mSDsluCounter, 2797 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 3075 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:22:35,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [988 Valid, 3075 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1769 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 13:22:35,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12806 states. [2021-11-19 13:22:36,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12806 to 11957. [2021-11-19 13:22:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11957 states, 11956 states have (on average 1.421796587487454) internal successors, (16999), 11956 states have internal predecessors, (16999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:36,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11957 states to 11957 states and 16999 transitions. [2021-11-19 13:22:36,854 INFO L78 Accepts]: Start accepts. Automaton has 11957 states and 16999 transitions. Word has length 73 [2021-11-19 13:22:36,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:22:36,854 INFO L470 AbstractCegarLoop]: Abstraction has 11957 states and 16999 transitions. [2021-11-19 13:22:36,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:36,854 INFO L276 IsEmpty]: Start isEmpty. Operand 11957 states and 16999 transitions. [2021-11-19 13:22:36,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 13:22:36,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:22:36,856 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:22:36,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-19 13:22:36,856 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:22:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:22:36,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1103721383, now seen corresponding path program 1 times [2021-11-19 13:22:36,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:22:36,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141571219] [2021-11-19 13:22:36,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:22:36,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:22:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:22:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:39,277 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:22:39,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141571219] [2021-11-19 13:22:39,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141571219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:22:39,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:22:39,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-11-19 13:22:39,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866969660] [2021-11-19 13:22:39,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:22:39,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-19 13:22:39,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:22:39,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-19 13:22:39,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-11-19 13:22:39,280 INFO L87 Difference]: Start difference. First operand 11957 states and 16999 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:46,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:22:46,868 INFO L93 Difference]: Finished difference Result 16277 states and 23208 transitions. [2021-11-19 13:22:46,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 13:22:46,869 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-19 13:22:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:22:46,889 INFO L225 Difference]: With dead ends: 16277 [2021-11-19 13:22:46,889 INFO L226 Difference]: Without dead ends: 14563 [2021-11-19 13:22:46,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=698, Invalid=2382, Unknown=0, NotChecked=0, Total=3080 [2021-11-19 13:22:46,897 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 971 mSDsluCounter, 4367 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 4649 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:22:46,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 4649 Invalid, 2086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 13:22:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14563 states. [2021-11-19 13:22:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14563 to 11941. [2021-11-19 13:22:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11941 states, 11940 states have (on average 1.4222780569514237) internal successors, (16982), 11940 states have internal predecessors, (16982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11941 states to 11941 states and 16982 transitions. [2021-11-19 13:22:48,528 INFO L78 Accepts]: Start accepts. Automaton has 11941 states and 16982 transitions. Word has length 74 [2021-11-19 13:22:48,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:22:48,529 INFO L470 AbstractCegarLoop]: Abstraction has 11941 states and 16982 transitions. [2021-11-19 13:22:48,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:48,529 INFO L276 IsEmpty]: Start isEmpty. Operand 11941 states and 16982 transitions. [2021-11-19 13:22:48,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 13:22:48,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:22:48,530 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:22:48,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-19 13:22:48,530 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:22:48,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:22:48,531 INFO L85 PathProgramCache]: Analyzing trace with hash -724303001, now seen corresponding path program 1 times [2021-11-19 13:22:48,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:22:48,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117976474] [2021-11-19 13:22:48,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:22:48,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:22:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:22:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:52,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:22:52,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117976474] [2021-11-19 13:22:52,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117976474] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:22:52,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:22:52,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-11-19 13:22:52,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668192193] [2021-11-19 13:22:52,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:22:52,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-19 13:22:52,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:22:52,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-19 13:22:52,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 13:22:52,315 INFO L87 Difference]: Start difference. First operand 11941 states and 16982 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:07,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:07,454 INFO L93 Difference]: Finished difference Result 13734 states and 19485 transitions. [2021-11-19 13:23:07,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-19 13:23:07,454 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-19 13:23:07,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:07,474 INFO L225 Difference]: With dead ends: 13734 [2021-11-19 13:23:07,474 INFO L226 Difference]: Without dead ends: 13732 [2021-11-19 13:23:07,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1208, Invalid=3622, Unknown=0, NotChecked=0, Total=4830 [2021-11-19 13:23:07,481 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 1238 mSDsluCounter, 4467 mSDsCounter, 0 mSdLazyCounter, 3703 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 4753 SdHoareTripleChecker+Invalid, 3759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:07,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1238 Valid, 4753 Invalid, 3759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3703 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-19 13:23:07,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13732 states. [2021-11-19 13:23:09,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13732 to 11934. [2021-11-19 13:23:09,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11934 states, 11933 states have (on average 1.42235816642923) internal successors, (16973), 11933 states have internal predecessors, (16973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:09,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11934 states to 11934 states and 16973 transitions. [2021-11-19 13:23:09,249 INFO L78 Accepts]: Start accepts. Automaton has 11934 states and 16973 transitions. Word has length 74 [2021-11-19 13:23:09,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:09,249 INFO L470 AbstractCegarLoop]: Abstraction has 11934 states and 16973 transitions. [2021-11-19 13:23:09,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:09,249 INFO L276 IsEmpty]: Start isEmpty. Operand 11934 states and 16973 transitions. [2021-11-19 13:23:09,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 13:23:09,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:09,251 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:23:09,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-19 13:23:09,251 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:09,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:09,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1897064569, now seen corresponding path program 1 times [2021-11-19 13:23:09,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:23:09,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769425417] [2021-11-19 13:23:09,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:09,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:23:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:10,268 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:23:10,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769425417] [2021-11-19 13:23:10,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769425417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:10,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:10,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 13:23:10,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411910966] [2021-11-19 13:23:10,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:10,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 13:23:10,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:23:10,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 13:23:10,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:23:10,270 INFO L87 Difference]: Start difference. First operand 11934 states and 16973 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:13,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:13,805 INFO L93 Difference]: Finished difference Result 17872 states and 25353 transitions. [2021-11-19 13:23:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 13:23:13,806 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-19 13:23:13,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:13,827 INFO L225 Difference]: With dead ends: 17872 [2021-11-19 13:23:13,827 INFO L226 Difference]: Without dead ends: 16046 [2021-11-19 13:23:13,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 13:23:13,834 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 908 mSDsluCounter, 1296 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:13,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 1533 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:23:13,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16046 states. [2021-11-19 13:23:15,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16046 to 11518. [2021-11-19 13:23:15,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11518 states, 11517 states have (on average 1.4218980637318746) internal successors, (16376), 11517 states have internal predecessors, (16376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:15,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11518 states to 11518 states and 16376 transitions. [2021-11-19 13:23:15,540 INFO L78 Accepts]: Start accepts. Automaton has 11518 states and 16376 transitions. Word has length 74 [2021-11-19 13:23:15,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:15,540 INFO L470 AbstractCegarLoop]: Abstraction has 11518 states and 16376 transitions. [2021-11-19 13:23:15,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:15,540 INFO L276 IsEmpty]: Start isEmpty. Operand 11518 states and 16376 transitions. [2021-11-19 13:23:15,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 13:23:15,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:15,541 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:23:15,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-19 13:23:15,542 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:15,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:15,542 INFO L85 PathProgramCache]: Analyzing trace with hash -931792025, now seen corresponding path program 1 times [2021-11-19 13:23:15,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:23:15,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922016943] [2021-11-19 13:23:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:15,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:23:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:16,431 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:23:16,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922016943] [2021-11-19 13:23:16,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922016943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:16,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:16,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 13:23:16,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093030073] [2021-11-19 13:23:16,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:16,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 13:23:16,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:23:16,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 13:23:16,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:23:16,434 INFO L87 Difference]: Start difference. First operand 11518 states and 16376 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:19,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:19,557 INFO L93 Difference]: Finished difference Result 14980 states and 21306 transitions. [2021-11-19 13:23:19,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 13:23:19,558 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-19 13:23:19,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:19,579 INFO L225 Difference]: With dead ends: 14980 [2021-11-19 13:23:19,579 INFO L226 Difference]: Without dead ends: 14066 [2021-11-19 13:23:19,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 13:23:19,586 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 699 mSDsluCounter, 2422 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 2700 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:19,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 2700 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:23:19,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14066 states. [2021-11-19 13:23:21,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14066 to 11509. [2021-11-19 13:23:21,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11509 states, 11508 states have (on average 1.4220542231491136) internal successors, (16365), 11508 states have internal predecessors, (16365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:21,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11509 states to 11509 states and 16365 transitions. [2021-11-19 13:23:21,299 INFO L78 Accepts]: Start accepts. Automaton has 11509 states and 16365 transitions. Word has length 74 [2021-11-19 13:23:21,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:21,300 INFO L470 AbstractCegarLoop]: Abstraction has 11509 states and 16365 transitions. [2021-11-19 13:23:21,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:21,300 INFO L276 IsEmpty]: Start isEmpty. Operand 11509 states and 16365 transitions. [2021-11-19 13:23:21,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 13:23:21,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:21,301 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:23:21,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-19 13:23:21,301 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:21,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:21,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1591274713, now seen corresponding path program 1 times [2021-11-19 13:23:21,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:23:21,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778807762] [2021-11-19 13:23:21,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:21,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:23:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:24,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:23:24,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778807762] [2021-11-19 13:23:24,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778807762] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:24,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:24,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-11-19 13:23:24,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32284809] [2021-11-19 13:23:24,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:24,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-19 13:23:24,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:23:24,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-19 13:23:24,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-11-19 13:23:24,286 INFO L87 Difference]: Start difference. First operand 11509 states and 16365 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:34,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:34,158 INFO L93 Difference]: Finished difference Result 14152 states and 20097 transitions. [2021-11-19 13:23:34,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 13:23:34,159 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-19 13:23:34,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:34,179 INFO L225 Difference]: With dead ends: 14152 [2021-11-19 13:23:34,179 INFO L226 Difference]: Without dead ends: 14150 [2021-11-19 13:23:34,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=700, Invalid=2606, Unknown=0, NotChecked=0, Total=3306 [2021-11-19 13:23:34,185 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 1413 mSDsluCounter, 3213 mSDsCounter, 0 mSdLazyCounter, 4794 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 4824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 4794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:34,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1413 Valid, 3458 Invalid, 4824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 4794 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-19 13:23:34,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14150 states. [2021-11-19 13:23:36,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14150 to 11519. [2021-11-19 13:23:36,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11519 states, 11518 states have (on average 1.4219482549053655) internal successors, (16378), 11518 states have internal predecessors, (16378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:36,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11519 states to 11519 states and 16378 transitions. [2021-11-19 13:23:36,033 INFO L78 Accepts]: Start accepts. Automaton has 11519 states and 16378 transitions. Word has length 74 [2021-11-19 13:23:36,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:36,033 INFO L470 AbstractCegarLoop]: Abstraction has 11519 states and 16378 transitions. [2021-11-19 13:23:36,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:36,034 INFO L276 IsEmpty]: Start isEmpty. Operand 11519 states and 16378 transitions. [2021-11-19 13:23:36,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 13:23:36,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:36,035 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:23:36,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-19 13:23:36,035 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:36,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:36,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2025334535, now seen corresponding path program 1 times [2021-11-19 13:23:36,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:23:36,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671569960] [2021-11-19 13:23:36,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:36,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:23:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:36,069 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:23:36,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671569960] [2021-11-19 13:23:36,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671569960] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:36,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:36,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:23:36,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150578863] [2021-11-19 13:23:36,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:36,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:23:36,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:23:36,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:23:36,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:23:36,073 INFO L87 Difference]: Start difference. First operand 11519 states and 16378 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:37,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:37,815 INFO L93 Difference]: Finished difference Result 21150 states and 30181 transitions. [2021-11-19 13:23:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:23:37,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-19 13:23:37,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:37,833 INFO L225 Difference]: With dead ends: 21150 [2021-11-19 13:23:37,833 INFO L226 Difference]: Without dead ends: 11110 [2021-11-19 13:23:37,847 INFO L932 BasicCegarLoop]: 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 [2021-11-19 13:23:37,847 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 122 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:37,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 342 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:23:37,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11110 states. [2021-11-19 13:23:39,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11110 to 11108. [2021-11-19 13:23:39,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11108 states, 11107 states have (on average 1.4194652021247862) internal successors, (15766), 11107 states have internal predecessors, (15766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11108 states to 11108 states and 15766 transitions. [2021-11-19 13:23:39,605 INFO L78 Accepts]: Start accepts. Automaton has 11108 states and 15766 transitions. Word has length 74 [2021-11-19 13:23:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:39,606 INFO L470 AbstractCegarLoop]: Abstraction has 11108 states and 15766 transitions. [2021-11-19 13:23:39,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 11108 states and 15766 transitions. [2021-11-19 13:23:39,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 13:23:39,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:39,608 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:23:39,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-19 13:23:39,608 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:39,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:39,608 INFO L85 PathProgramCache]: Analyzing trace with hash -474086838, now seen corresponding path program 1 times [2021-11-19 13:23:39,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:23:39,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104962981] [2021-11-19 13:23:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:39,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:23:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:39,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:23:39,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104962981] [2021-11-19 13:23:39,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104962981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:39,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:39,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:23:39,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273934873] [2021-11-19 13:23:39,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:39,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:23:39,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:23:39,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:23:39,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:23:39,643 INFO L87 Difference]: Start difference. First operand 11108 states and 15766 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:41,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:41,342 INFO L93 Difference]: Finished difference Result 20966 states and 29870 transitions. [2021-11-19 13:23:41,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:23:41,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-19 13:23:41,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:41,359 INFO L225 Difference]: With dead ends: 20966 [2021-11-19 13:23:41,359 INFO L226 Difference]: Without dead ends: 10668 [2021-11-19 13:23:41,368 INFO L932 BasicCegarLoop]: 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 [2021-11-19 13:23:41,369 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 121 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:41,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 334 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:23:41,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10668 states. [2021-11-19 13:23:42,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10668 to 10666. [2021-11-19 13:23:42,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10666 states, 10665 states have (on average 1.4165963431786217) internal successors, (15108), 10665 states have internal predecessors, (15108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:42,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10666 states to 10666 states and 15108 transitions. [2021-11-19 13:23:42,984 INFO L78 Accepts]: Start accepts. Automaton has 10666 states and 15108 transitions. Word has length 74 [2021-11-19 13:23:42,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:42,984 INFO L470 AbstractCegarLoop]: Abstraction has 10666 states and 15108 transitions. [2021-11-19 13:23:42,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:42,984 INFO L276 IsEmpty]: Start isEmpty. Operand 10666 states and 15108 transitions. [2021-11-19 13:23:42,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 13:23:42,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:42,986 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:23:42,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-19 13:23:42,986 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:42,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:42,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1295278433, now seen corresponding path program 1 times [2021-11-19 13:23:42,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:23:42,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133928794] [2021-11-19 13:23:42,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:42,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:23:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:46,600 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:23:46,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133928794] [2021-11-19 13:23:46,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133928794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:46,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:46,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-19 13:23:46,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841375123] [2021-11-19 13:23:46,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:46,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-19 13:23:46,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:23:46,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-19 13:23:46,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-11-19 13:23:46,602 INFO L87 Difference]: Start difference. First operand 10666 states and 15108 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:58,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:58,281 INFO L93 Difference]: Finished difference Result 12328 states and 17418 transitions. [2021-11-19 13:23:58,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-19 13:23:58,281 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-19 13:23:58,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:58,298 INFO L225 Difference]: With dead ends: 12328 [2021-11-19 13:23:58,298 INFO L226 Difference]: Without dead ends: 12326 [2021-11-19 13:23:58,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=926, Invalid=2980, Unknown=0, NotChecked=0, Total=3906 [2021-11-19 13:23:58,303 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 1060 mSDsluCounter, 3127 mSDsCounter, 0 mSdLazyCounter, 3014 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1060 SdHoareTripleChecker+Valid, 3489 SdHoareTripleChecker+Invalid, 3052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:58,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1060 Valid, 3489 Invalid, 3052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3014 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-19 13:23:58,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12326 states. [2021-11-19 13:23:59,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12326 to 10672. [2021-11-19 13:23:59,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10672 states, 10671 states have (on average 1.4164558148252273) internal successors, (15115), 10671 states have internal predecessors, (15115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:59,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10672 states to 10672 states and 15115 transitions. [2021-11-19 13:23:59,963 INFO L78 Accepts]: Start accepts. Automaton has 10672 states and 15115 transitions. Word has length 75 [2021-11-19 13:23:59,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:59,963 INFO L470 AbstractCegarLoop]: Abstraction has 10672 states and 15115 transitions. [2021-11-19 13:23:59,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:59,964 INFO L276 IsEmpty]: Start isEmpty. Operand 10672 states and 15115 transitions. [2021-11-19 13:23:59,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-19 13:23:59,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:59,966 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:23:59,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-19 13:23:59,967 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:59,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:59,967 INFO L85 PathProgramCache]: Analyzing trace with hash -2092049029, now seen corresponding path program 1 times [2021-11-19 13:23:59,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:23:59,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995663431] [2021-11-19 13:23:59,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:59,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:24:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:24:04,288 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:24:04,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995663431] [2021-11-19 13:24:04,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995663431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:04,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:24:04,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-19 13:24:04,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791206684] [2021-11-19 13:24:04,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:04,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-19 13:24:04,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:24:04,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-19 13:24:04,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-11-19 13:24:04,294 INFO L87 Difference]: Start difference. First operand 10672 states and 15115 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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) [2021-11-19 13:24:15,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:15,135 INFO L93 Difference]: Finished difference Result 12283 states and 17369 transitions. [2021-11-19 13:24:15,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 13:24:15,136 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 [2021-11-19 13:24:15,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:15,150 INFO L225 Difference]: With dead ends: 12283 [2021-11-19 13:24:15,150 INFO L226 Difference]: Without dead ends: 12281 [2021-11-19 13:24:15,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1002, Invalid=3288, Unknown=0, NotChecked=0, Total=4290 [2021-11-19 13:24:15,155 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 1399 mSDsluCounter, 2244 mSDsCounter, 0 mSdLazyCounter, 3518 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1399 SdHoareTripleChecker+Valid, 2457 SdHoareTripleChecker+Invalid, 3587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:15,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1399 Valid, 2457 Invalid, 3587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 3518 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-19 13:24:15,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12281 states. [2021-11-19 13:24:16,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12281 to 10668. [2021-11-19 13:24:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10668 states, 10667 states have (on average 1.4165182338051936) internal successors, (15110), 10667 states have internal predecessors, (15110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:24:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10668 states to 10668 states and 15110 transitions. [2021-11-19 13:24:16,881 INFO L78 Accepts]: Start accepts. Automaton has 10668 states and 15110 transitions. Word has length 76 [2021-11-19 13:24:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:16,882 INFO L470 AbstractCegarLoop]: Abstraction has 10668 states and 15110 transitions. [2021-11-19 13:24:16,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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) [2021-11-19 13:24:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 10668 states and 15110 transitions. [2021-11-19 13:24:16,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-19 13:24:16,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:16,884 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:24:16,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-19 13:24:16,884 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:24:16,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:16,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1030156699, now seen corresponding path program 1 times [2021-11-19 13:24:16,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:24:16,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548120056] [2021-11-19 13:24:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:16,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:24:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:24:20,108 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:24:20,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548120056] [2021-11-19 13:24:20,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548120056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:20,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:24:20,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-19 13:24:20,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187020944] [2021-11-19 13:24:20,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:20,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-19 13:24:20,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:24:20,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-19 13:24:20,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-11-19 13:24:20,111 INFO L87 Difference]: Start difference. First operand 10668 states and 15110 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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) [2021-11-19 13:24:30,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:30,399 INFO L93 Difference]: Finished difference Result 13160 states and 18648 transitions. [2021-11-19 13:24:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 13:24:30,400 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 [2021-11-19 13:24:30,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:30,417 INFO L225 Difference]: With dead ends: 13160 [2021-11-19 13:24:30,417 INFO L226 Difference]: Without dead ends: 12310 [2021-11-19 13:24:30,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=792, Invalid=2514, Unknown=0, NotChecked=0, Total=3306 [2021-11-19 13:24:30,423 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 971 mSDsluCounter, 3516 mSDsCounter, 0 mSdLazyCounter, 2007 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 3794 SdHoareTripleChecker+Invalid, 2042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:30,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 3794 Invalid, 2042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2007 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 13:24:30,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12310 states. [2021-11-19 13:24:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12310 to 10646. [2021-11-19 13:24:32,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10646 states, 10645 states have (on average 1.4171911695631751) internal successors, (15086), 10645 states have internal predecessors, (15086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:24:32,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10646 states to 10646 states and 15086 transitions. [2021-11-19 13:24:32,193 INFO L78 Accepts]: Start accepts. Automaton has 10646 states and 15086 transitions. Word has length 76 [2021-11-19 13:24:32,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:32,193 INFO L470 AbstractCegarLoop]: Abstraction has 10646 states and 15086 transitions. [2021-11-19 13:24:32,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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) [2021-11-19 13:24:32,193 INFO L276 IsEmpty]: Start isEmpty. Operand 10646 states and 15086 transitions. [2021-11-19 13:24:32,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-19 13:24:32,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:32,195 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:24:32,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-19 13:24:32,195 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:24:32,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:32,195 INFO L85 PathProgramCache]: Analyzing trace with hash 370674011, now seen corresponding path program 1 times [2021-11-19 13:24:32,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:24:32,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140190566] [2021-11-19 13:24:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:32,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:24:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:24:36,678 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:24:36,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140190566] [2021-11-19 13:24:36,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140190566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:36,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:24:36,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-11-19 13:24:36,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747915137] [2021-11-19 13:24:36,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:36,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-19 13:24:36,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:24:36,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-19 13:24:36,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 13:24:36,680 INFO L87 Difference]: Start difference. First operand 10646 states and 15086 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 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) [2021-11-19 13:24:48,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:48,672 INFO L93 Difference]: Finished difference Result 12259 states and 17344 transitions. [2021-11-19 13:24:48,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 13:24:48,672 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 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 [2021-11-19 13:24:48,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:48,691 INFO L225 Difference]: With dead ends: 12259 [2021-11-19 13:24:48,691 INFO L226 Difference]: Without dead ends: 12257 [2021-11-19 13:24:48,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1019, Invalid=3673, Unknown=0, NotChecked=0, Total=4692 [2021-11-19 13:24:48,695 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 1518 mSDsluCounter, 2585 mSDsCounter, 0 mSdLazyCounter, 4117 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1518 SdHoareTripleChecker+Valid, 2829 SdHoareTripleChecker+Invalid, 4163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 4117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:48,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1518 Valid, 2829 Invalid, 4163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 4117 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-19 13:24:48,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12257 states. [2021-11-19 13:24:50,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12257 to 10642. [2021-11-19 13:24:50,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10642 states, 10641 states have (on average 1.4172540174795603) internal successors, (15081), 10641 states have internal predecessors, (15081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:24:50,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10642 states to 10642 states and 15081 transitions. [2021-11-19 13:24:50,479 INFO L78 Accepts]: Start accepts. Automaton has 10642 states and 15081 transitions. Word has length 76 [2021-11-19 13:24:50,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:50,480 INFO L470 AbstractCegarLoop]: Abstraction has 10642 states and 15081 transitions. [2021-11-19 13:24:50,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 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) [2021-11-19 13:24:50,480 INFO L276 IsEmpty]: Start isEmpty. Operand 10642 states and 15081 transitions. [2021-11-19 13:24:50,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-19 13:24:50,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:50,482 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:24:50,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-19 13:24:50,482 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:24:50,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:50,482 INFO L85 PathProgramCache]: Analyzing trace with hash 284652859, now seen corresponding path program 1 times [2021-11-19 13:24:50,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:24:50,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550688065] [2021-11-19 13:24:50,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:50,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:24:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:24:59,427 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:24:59,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550688065] [2021-11-19 13:24:59,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550688065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:59,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:24:59,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-11-19 13:24:59,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058272263] [2021-11-19 13:24:59,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:59,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-19 13:24:59,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:24:59,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-19 13:24:59,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 13:24:59,430 INFO L87 Difference]: Start difference. First operand 10642 states and 15081 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 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) [2021-11-19 13:25:18,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:18,204 INFO L93 Difference]: Finished difference Result 12289 states and 17375 transitions. [2021-11-19 13:25:18,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 13:25:18,205 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 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 [2021-11-19 13:25:18,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:18,221 INFO L225 Difference]: With dead ends: 12289 [2021-11-19 13:25:18,221 INFO L226 Difference]: Without dead ends: 12287 [2021-11-19 13:25:18,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=913, Invalid=3247, Unknown=0, NotChecked=0, Total=4160 [2021-11-19 13:25:18,226 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 1369 mSDsluCounter, 2952 mSDsCounter, 0 mSdLazyCounter, 4967 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1369 SdHoareTripleChecker+Valid, 3259 SdHoareTripleChecker+Invalid, 5001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 4967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:18,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1369 Valid, 3259 Invalid, 5001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 4967 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-11-19 13:25:18,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12287 states. [2021-11-19 13:25:20,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12287 to 10654. [2021-11-19 13:25:20,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10654 states, 10653 states have (on average 1.4169717450483432) internal successors, (15095), 10653 states have internal predecessors, (15095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:25:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10654 states to 10654 states and 15095 transitions. [2021-11-19 13:25:20,098 INFO L78 Accepts]: Start accepts. Automaton has 10654 states and 15095 transitions. Word has length 76 [2021-11-19 13:25:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:20,099 INFO L470 AbstractCegarLoop]: Abstraction has 10654 states and 15095 transitions. [2021-11-19 13:25:20,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 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) [2021-11-19 13:25:20,099 INFO L276 IsEmpty]: Start isEmpty. Operand 10654 states and 15095 transitions. [2021-11-19 13:25:20,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 13:25:20,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:20,100 INFO L514 BasicCegarLoop]: 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] [2021-11-19 13:25:20,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-19 13:25:20,101 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:20,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:20,101 INFO L85 PathProgramCache]: Analyzing trace with hash 226733679, now seen corresponding path program 1 times [2021-11-19 13:25:20,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:25:20,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988517388] [2021-11-19 13:25:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:20,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:25:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:25:35,289 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:25:35,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988517388] [2021-11-19 13:25:35,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988517388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:25:35,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:25:35,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-11-19 13:25:35,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516918851] [2021-11-19 13:25:35,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:35,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-19 13:25:35,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:25:35,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-19 13:25:35,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1909, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 13:25:35,291 INFO L87 Difference]: Start difference. First operand 10654 states and 15095 transitions. Second operand has 46 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 45 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:04,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:04,316 INFO L93 Difference]: Finished difference Result 12271 states and 17359 transitions. [2021-11-19 13:26:04,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-19 13:26:04,317 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 45 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-19 13:26:04,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:04,334 INFO L225 Difference]: With dead ends: 12271 [2021-11-19 13:26:04,334 INFO L226 Difference]: Without dead ends: 12269 [2021-11-19 13:26:04,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=1372, Invalid=4948, Unknown=0, NotChecked=0, Total=6320 [2021-11-19 13:26:04,339 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 1260 mSDsluCounter, 3624 mSDsCounter, 0 mSdLazyCounter, 6910 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1260 SdHoareTripleChecker+Valid, 3929 SdHoareTripleChecker+Invalid, 6945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 6910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:04,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1260 Valid, 3929 Invalid, 6945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 6910 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2021-11-19 13:26:04,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12269 states. [2021-11-19 13:26:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12269 to 10630. [2021-11-19 13:26:06,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10630 states, 10629 states have (on average 1.4177250917301722) internal successors, (15069), 10629 states have internal predecessors, (15069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:06,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10630 states to 10630 states and 15069 transitions. [2021-11-19 13:26:06,100 INFO L78 Accepts]: Start accepts. Automaton has 10630 states and 15069 transitions. Word has length 78 [2021-11-19 13:26:06,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:06,100 INFO L470 AbstractCegarLoop]: Abstraction has 10630 states and 15069 transitions. [2021-11-19 13:26:06,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 45 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:06,100 INFO L276 IsEmpty]: Start isEmpty. Operand 10630 states and 15069 transitions. [2021-11-19 13:26:06,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-19 13:26:06,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:06,104 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:26:06,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-19 13:26:06,105 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:06,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:06,105 INFO L85 PathProgramCache]: Analyzing trace with hash 571718094, now seen corresponding path program 1 times [2021-11-19 13:26:06,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:26:06,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527791980] [2021-11-19 13:26:06,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:06,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:26:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:26:06,159 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:26:06,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527791980] [2021-11-19 13:26:06,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527791980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:06,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:06,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:26:06,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644090627] [2021-11-19 13:26:06,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:06,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:26:06,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:26:06,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:26:06,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:26:06,161 INFO L87 Difference]: Start difference. First operand 10630 states and 15069 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) 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) [2021-11-19 13:26:08,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:08,405 INFO L93 Difference]: Finished difference Result 17944 states and 25738 transitions. [2021-11-19 13:26:08,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:26:08,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) 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 [2021-11-19 13:26:08,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:08,425 INFO L225 Difference]: With dead ends: 17944 [2021-11-19 13:26:08,425 INFO L226 Difference]: Without dead ends: 14374 [2021-11-19 13:26:08,431 INFO L932 BasicCegarLoop]: 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 [2021-11-19 13:26:08,431 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 90 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:08,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 398 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:26:08,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14374 states. [2021-11-19 13:26:10,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14374 to 13812. [2021-11-19 13:26:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13812 states, 13811 states have (on average 1.4182897690246905) internal successors, (19588), 13811 states have internal predecessors, (19588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:10,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13812 states to 13812 states and 19588 transitions. [2021-11-19 13:26:10,637 INFO L78 Accepts]: Start accepts. Automaton has 13812 states and 19588 transitions. Word has length 82 [2021-11-19 13:26:10,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:10,638 INFO L470 AbstractCegarLoop]: Abstraction has 13812 states and 19588 transitions. [2021-11-19 13:26:10,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) 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) [2021-11-19 13:26:10,638 INFO L276 IsEmpty]: Start isEmpty. Operand 13812 states and 19588 transitions. [2021-11-19 13:26:10,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 13:26:10,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:10,640 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:26:10,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-19 13:26:10,641 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:10,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:10,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1440002605, now seen corresponding path program 1 times [2021-11-19 13:26:10,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:26:10,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231862874] [2021-11-19 13:26:10,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:10,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:26:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:26:10,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:26:10,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231862874] [2021-11-19 13:26:10,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231862874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:10,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:10,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:26:10,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833264458] [2021-11-19 13:26:10,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:10,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:26:10,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:26:10,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:26:10,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:26:10,688 INFO L87 Difference]: Start difference. First operand 13812 states and 19588 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:13,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:13,437 INFO L93 Difference]: Finished difference Result 24264 states and 34764 transitions. [2021-11-19 13:26:13,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:26:13,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-19 13:26:13,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:13,465 INFO L225 Difference]: With dead ends: 24264 [2021-11-19 13:26:13,465 INFO L226 Difference]: Without dead ends: 17606 [2021-11-19 13:26:13,474 INFO L932 BasicCegarLoop]: 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 [2021-11-19 13:26:13,475 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 86 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:13,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 379 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:26:13,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17606 states. [2021-11-19 13:26:16,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17606 to 16642. [2021-11-19 13:26:16,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16642 states, 16641 states have (on average 1.4177633555675742) internal successors, (23593), 16641 states have internal predecessors, (23593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16642 states to 16642 states and 23593 transitions. [2021-11-19 13:26:16,229 INFO L78 Accepts]: Start accepts. Automaton has 16642 states and 23593 transitions. Word has length 84 [2021-11-19 13:26:16,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:16,229 INFO L470 AbstractCegarLoop]: Abstraction has 16642 states and 23593 transitions. [2021-11-19 13:26:16,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:16,229 INFO L276 IsEmpty]: Start isEmpty. Operand 16642 states and 23593 transitions. [2021-11-19 13:26:16,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 13:26:16,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:16,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:26:16,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-19 13:26:16,232 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:16,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:16,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1724677796, now seen corresponding path program 1 times [2021-11-19 13:26:16,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:26:16,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90441656] [2021-11-19 13:26:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:16,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:26:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:26:16,289 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:26:16,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90441656] [2021-11-19 13:26:16,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90441656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:16,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:16,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:26:16,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610198863] [2021-11-19 13:26:16,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:16,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:26:16,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:26:16,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:26:16,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:26:16,292 INFO L87 Difference]: Start difference. First operand 16642 states and 23593 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:19,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:19,831 INFO L93 Difference]: Finished difference Result 33358 states and 47623 transitions. [2021-11-19 13:26:19,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:26:19,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-11-19 13:26:19,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:19,864 INFO L225 Difference]: With dead ends: 33358 [2021-11-19 13:26:19,864 INFO L226 Difference]: Without dead ends: 22648 [2021-11-19 13:26:19,875 INFO L932 BasicCegarLoop]: 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 [2021-11-19 13:26:19,876 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 81 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:19,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 360 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:26:19,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22648 states. [2021-11-19 13:26:23,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22648 to 21102. [2021-11-19 13:26:23,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21102 states, 21101 states have (on average 1.4136296857968818) internal successors, (29829), 21101 states have internal predecessors, (29829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21102 states to 21102 states and 29829 transitions. [2021-11-19 13:26:23,255 INFO L78 Accepts]: Start accepts. Automaton has 21102 states and 29829 transitions. Word has length 87 [2021-11-19 13:26:23,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:23,256 INFO L470 AbstractCegarLoop]: Abstraction has 21102 states and 29829 transitions. [2021-11-19 13:26:23,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:23,256 INFO L276 IsEmpty]: Start isEmpty. Operand 21102 states and 29829 transitions. [2021-11-19 13:26:23,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-19 13:26:23,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:23,259 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:26:23,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-19 13:26:23,259 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:23,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:23,260 INFO L85 PathProgramCache]: Analyzing trace with hash 589107628, now seen corresponding path program 1 times [2021-11-19 13:26:23,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:26:23,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764430249] [2021-11-19 13:26:23,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:23,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:26:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:26:23,314 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:26:23,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764430249] [2021-11-19 13:26:23,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764430249] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:23,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:23,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:26:23,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093503056] [2021-11-19 13:26:23,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:23,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:26:23,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:26:23,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:26:23,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:26:23,317 INFO L87 Difference]: Start difference. First operand 21102 states and 29829 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:28,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:28,198 INFO L93 Difference]: Finished difference Result 48326 states and 68610 transitions. [2021-11-19 13:26:28,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:26:28,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-11-19 13:26:28,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:28,255 INFO L225 Difference]: With dead ends: 48326 [2021-11-19 13:26:28,255 INFO L226 Difference]: Without dead ends: 30652 [2021-11-19 13:26:28,274 INFO L932 BasicCegarLoop]: 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 [2021-11-19 13:26:28,275 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 76 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:28,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 341 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:26:28,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30652 states. [2021-11-19 13:26:32,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30652 to 28186. [2021-11-19 13:26:32,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28186 states, 28185 states have (on average 1.4062799361362426) internal successors, (39636), 28185 states have internal predecessors, (39636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:33,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28186 states to 28186 states and 39636 transitions. [2021-11-19 13:26:33,039 INFO L78 Accepts]: Start accepts. Automaton has 28186 states and 39636 transitions. Word has length 90 [2021-11-19 13:26:33,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:33,040 INFO L470 AbstractCegarLoop]: Abstraction has 28186 states and 39636 transitions. [2021-11-19 13:26:33,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:33,040 INFO L276 IsEmpty]: Start isEmpty. Operand 28186 states and 39636 transitions. [2021-11-19 13:26:33,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 13:26:33,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:33,045 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:26:33,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-19 13:26:33,045 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:33,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:33,046 INFO L85 PathProgramCache]: Analyzing trace with hash -603234454, now seen corresponding path program 1 times [2021-11-19 13:26:33,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:26:33,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086184353] [2021-11-19 13:26:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:33,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:26:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:26:33,100 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:26:33,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086184353] [2021-11-19 13:26:33,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086184353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:33,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:33,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:26:33,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108706759] [2021-11-19 13:26:33,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:33,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:26:33,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:26:33,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:26:33,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:26:33,103 INFO L87 Difference]: Start difference. First operand 28186 states and 39636 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:40,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:40,241 INFO L93 Difference]: Finished difference Result 67649 states and 95374 transitions. [2021-11-19 13:26:40,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:26:40,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-11-19 13:26:40,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:40,323 INFO L225 Difference]: With dead ends: 67649 [2021-11-19 13:26:40,323 INFO L226 Difference]: Without dead ends: 41235 [2021-11-19 13:26:40,354 INFO L932 BasicCegarLoop]: 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 [2021-11-19 13:26:40,354 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 72 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:40,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 341 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:26:40,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41235 states. [2021-11-19 13:26:47,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41235 to 38314. [2021-11-19 13:26:47,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38314 states, 38313 states have (on average 1.3979328165374676) internal successors, (53559), 38313 states have internal predecessors, (53559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:47,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38314 states to 38314 states and 53559 transitions. [2021-11-19 13:26:47,124 INFO L78 Accepts]: Start accepts. Automaton has 38314 states and 53559 transitions. Word has length 93 [2021-11-19 13:26:47,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:47,125 INFO L470 AbstractCegarLoop]: Abstraction has 38314 states and 53559 transitions. [2021-11-19 13:26:47,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:47,125 INFO L276 IsEmpty]: Start isEmpty. Operand 38314 states and 53559 transitions. [2021-11-19 13:26:47,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 13:26:47,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:47,129 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:26:47,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-19 13:26:47,129 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:47,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:47,130 INFO L85 PathProgramCache]: Analyzing trace with hash -345352500, now seen corresponding path program 1 times [2021-11-19 13:26:47,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:26:47,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284792832] [2021-11-19 13:26:47,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:47,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:26:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:26:47,178 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:26:47,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284792832] [2021-11-19 13:26:47,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284792832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:47,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:47,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:26:47,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513327199] [2021-11-19 13:26:47,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:47,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:26:47,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:26:47,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:26:47,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:26:47,181 INFO L87 Difference]: Start difference. First operand 38314 states and 53559 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:58,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:58,066 INFO L93 Difference]: Finished difference Result 82923 states and 115872 transitions. [2021-11-19 13:26:58,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:26:58,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-11-19 13:26:58,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:58,185 INFO L225 Difference]: With dead ends: 82923 [2021-11-19 13:26:58,185 INFO L226 Difference]: Without dead ends: 58353 [2021-11-19 13:26:58,212 INFO L932 BasicCegarLoop]: 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 [2021-11-19 13:26:58,213 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 83 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:58,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 392 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:26:58,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58353 states.