./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-ticket-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563c4705-5d24-4850-acf5-9b32325e2815/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563c4705-5d24-4850-acf5-9b32325e2815/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563c4705-5d24-4850-acf5-9b32325e2815/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563c4705-5d24-4850-acf5-9b32325e2815/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/parallel-ticket-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563c4705-5d24-4850-acf5-9b32325e2815/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563c4705-5d24-4850-acf5-9b32325e2815/bin/utaipan-SDwSMHVbGG --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 57b9f50bcc1a62fff86b613ffbbe182d8b5828efa44efacd776b022a56af4d4d ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:32:22,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:32:22,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:32:22,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:32:22,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:32:22,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:32:22,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:32:22,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:32:22,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:32:22,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:32:22,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:32:22,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:32:22,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:32:22,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:32:22,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:32:22,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:32:22,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:32:22,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:32:22,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:32:22,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:32:22,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:32:22,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:32:22,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:32:22,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:32:22,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:32:22,200 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:32:22,200 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:32:22,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:32:22,202 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:32:22,204 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:32:22,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:32:22,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:32:22,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:32:22,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:32:22,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:32:22,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:32:22,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:32:22,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:32:22,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:32:22,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:32:22,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:32:22,224 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563c4705-5d24-4850-acf5-9b32325e2815/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 05:32:22,280 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:32:22,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:32:22,281 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:32:22,282 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:32:22,282 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:32:22,282 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:32:22,283 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:32:22,283 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:32:22,283 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:32:22,284 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:32:22,284 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:32:22,284 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:32:22,285 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:32:22,285 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:32:22,285 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:32:22,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:32:22,287 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:32:22,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:32:22,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:32:22,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:32:22,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:32:22,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:32:22,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:32:22,289 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:32:22,289 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:32:22,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:32:22,290 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:32:22,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:32:22,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:32:22,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:32:22,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:32:22,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:32:22,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:32:22,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:32:22,292 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:32:22,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:32:22,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:32:22,293 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:32:22,294 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:32:22,294 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_563c4705-5d24-4850-acf5-9b32325e2815/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563c4705-5d24-4850-acf5-9b32325e2815/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57b9f50bcc1a62fff86b613ffbbe182d8b5828efa44efacd776b022a56af4d4d [2021-10-29 05:32:22,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:32:22,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:32:22,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:32:22,743 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:32:22,744 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:32:22,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563c4705-5d24-4850-acf5-9b32325e2815/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/weaver/parallel-ticket-4.wvr.c [2021-10-29 05:32:22,860 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563c4705-5d24-4850-acf5-9b32325e2815/bin/utaipan-SDwSMHVbGG/data/447c27c42/a611a56c827a40cd97b758931cc032d7/FLAG58a7e2260 [2021-10-29 05:32:23,482 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:32:23,482 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563c4705-5d24-4850-acf5-9b32325e2815/sv-benchmarks/c/weaver/parallel-ticket-4.wvr.c [2021-10-29 05:32:23,496 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563c4705-5d24-4850-acf5-9b32325e2815/bin/utaipan-SDwSMHVbGG/data/447c27c42/a611a56c827a40cd97b758931cc032d7/FLAG58a7e2260 [2021-10-29 05:32:23,805 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563c4705-5d24-4850-acf5-9b32325e2815/bin/utaipan-SDwSMHVbGG/data/447c27c42/a611a56c827a40cd97b758931cc032d7 [2021-10-29 05:32:23,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:32:23,816 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:32:23,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:32:23,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:32:23,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:32:23,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:32:23" (1/1) ... [2021-10-29 05:32:23,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@437123ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:32:23, skipping insertion in model container [2021-10-29 05:32:23,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:32:23" (1/1) ... [2021-10-29 05:32:23,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:32:23,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:32:24,112 WARN L228 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_563c4705-5d24-4850-acf5-9b32325e2815/sv-benchmarks/c/weaver/parallel-ticket-4.wvr.c[3526,3539] [2021-10-29 05:32:24,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:32:24,128 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:32:24,161 WARN L228 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_563c4705-5d24-4850-acf5-9b32325e2815/sv-benchmarks/c/weaver/parallel-ticket-4.wvr.c[3526,3539] [2021-10-29 05:32:24,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:32:24,180 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:32:24,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:32:24 WrapperNode [2021-10-29 05:32:24,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:32:24,181 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:32:24,181 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:32:24,182 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:32:24,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:32:24" (1/1) ... [2021-10-29 05:32:24,222 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:32:24" (1/1) ... [2021-10-29 05:32:24,262 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:32:24,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:32:24,263 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:32:24,263 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:32:24,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:32:24" (1/1) ... [2021-10-29 05:32:24,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:32:24" (1/1) ... [2021-10-29 05:32:24,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:32:24" (1/1) ... [2021-10-29 05:32:24,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:32:24" (1/1) ... [2021-10-29 05:32:24,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:32:24" (1/1) ... [2021-10-29 05:32:24,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:32:24" (1/1) ... [2021-10-29 05:32:24,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:32:24" (1/1) ... [2021-10-29 05:32:24,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:32:24,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:32:24,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:32:24,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:32:24,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:32:24" (1/1) ... [2021-10-29 05:32:24,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:32:24,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563c4705-5d24-4850-acf5-9b32325e2815/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:32:24,340 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563c4705-5d24-4850-acf5-9b32325e2815/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:32:24,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563c4705-5d24-4850-acf5-9b32325e2815/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:32:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-29 05:32:24,383 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-29 05:32:24,384 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-29 05:32:24,384 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-29 05:32:24,384 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-29 05:32:24,384 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-29 05:32:24,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-29 05:32:24,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-29 05:32:24,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:32:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:32:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-29 05:32:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-29 05:32:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-29 05:32:24,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:32:24,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:32:24,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-29 05:32:24,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 05:32:24,389 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-29 05:32:25,158 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:32:25,159 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-10-29 05:32:25,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:32:25 BoogieIcfgContainer [2021-10-29 05:32:25,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:32:25,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:32:25,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:32:25,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:32:25,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:32:23" (1/3) ... [2021-10-29 05:32:25,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564fffbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:32:25, skipping insertion in model container [2021-10-29 05:32:25,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:32:24" (2/3) ... [2021-10-29 05:32:25,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564fffbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:32:25, skipping insertion in model container [2021-10-29 05:32:25,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:32:25" (3/3) ... [2021-10-29 05:32:25,173 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-ticket-4.wvr.c [2021-10-29 05:32:25,180 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-29 05:32:25,180 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:32:25,180 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-29 05:32:25,180 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-29 05:32:25,223 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,224 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,224 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,224 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,225 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,225 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,225 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,226 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,226 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,226 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,227 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,227 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,227 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,228 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,228 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,228 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,228 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,229 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,229 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,230 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,230 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,230 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,230 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,230 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,231 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,231 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,232 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,232 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,232 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,232 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,233 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,233 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,233 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,234 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,234 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,234 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,235 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,235 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,235 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,235 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,236 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,236 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,236 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,237 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,237 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,237 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,237 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,238 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,241 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,241 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,242 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,242 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,242 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,242 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,245 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,245 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,245 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,245 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,246 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,246 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,248 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,248 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,248 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,248 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,249 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,249 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,251 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,251 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,252 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,252 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,252 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,252 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-29 05:32:25,263 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-29 05:32:25,320 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:32:25,329 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 [2021-10-29 05:32:25,329 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-29 05:32:25,350 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-29 05:32:25,363 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 134 transitions, 300 flow [2021-10-29 05:32:25,367 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 134 transitions, 300 flow [2021-10-29 05:32:25,369 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 145 places, 134 transitions, 300 flow [2021-10-29 05:32:25,448 INFO L129 PetriNetUnfolder]: 2/130 cut-off events. [2021-10-29 05:32:25,449 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-29 05:32:25,453 INFO L84 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 130 events. 2/130 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 96. Up to 2 conditions per place. [2021-10-29 05:32:25,458 INFO L116 LiptonReduction]: Number of co-enabled transitions 1302 [2021-10-29 05:32:31,659 INFO L131 LiptonReduction]: Checked pairs total: 3127 [2021-10-29 05:32:31,659 INFO L133 LiptonReduction]: Total number of compositions: 109 [2021-10-29 05:32:31,678 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 31 transitions, 94 flow [2021-10-29 05:32:31,723 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 402 states, 401 states have (on average 3.027431421446384) internal successors, (1214), 401 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:31,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 402 states, 401 states have (on average 3.027431421446384) internal successors, (1214), 401 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:31,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:31,755 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:31,756 INFO L513 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] [2021-10-29 05:32:31,756 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:31,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:31,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1792856431, now seen corresponding path program 1 times [2021-10-29 05:32:31,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:31,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278617245] [2021-10-29 05:32:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:31,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:32,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:32,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278617245] [2021-10-29 05:32:32,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278617245] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:32,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:32,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-29 05:32:32,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517462534] [2021-10-29 05:32:32,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-29 05:32:32,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:32,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-29 05:32:32,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-29 05:32:32,667 INFO L87 Difference]: Start difference. First operand has 402 states, 401 states have (on average 3.027431421446384) internal successors, (1214), 401 states have internal predecessors, (1214), 0 states have call successors, (0), 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, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:32,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:32,917 INFO L93 Difference]: Finished difference Result 623 states and 1815 transitions. [2021-10-29 05:32:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-29 05:32:32,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:32,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:32,951 INFO L225 Difference]: With dead ends: 623 [2021-10-29 05:32:32,952 INFO L226 Difference]: Without dead ends: 526 [2021-10-29 05:32:32,953 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:32,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-10-29 05:32:33,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2021-10-29 05:32:33,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 2.9771428571428573) internal successors, (1563), 525 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:33,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1563 transitions. [2021-10-29 05:32:33,089 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1563 transitions. Word has length 26 [2021-10-29 05:32:33,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:33,090 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 1563 transitions. [2021-10-29 05:32:33,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:33,091 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1563 transitions. [2021-10-29 05:32:33,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:33,104 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:33,104 INFO L513 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] [2021-10-29 05:32:33,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 05:32:33,105 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:33,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:33,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1537703415, now seen corresponding path program 2 times [2021-10-29 05:32:33,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:33,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110408194] [2021-10-29 05:32:33,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:33,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:33,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:33,395 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:33,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110408194] [2021-10-29 05:32:33,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110408194] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:33,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:33,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-29 05:32:33,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885604564] [2021-10-29 05:32:33,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-29 05:32:33,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:33,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-29 05:32:33,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-29 05:32:33,403 INFO L87 Difference]: Start difference. First operand 526 states and 1563 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:33,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:33,600 INFO L93 Difference]: Finished difference Result 1096 states and 3000 transitions. [2021-10-29 05:32:33,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-29 05:32:33,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:33,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:33,614 INFO L225 Difference]: With dead ends: 1096 [2021-10-29 05:32:33,614 INFO L226 Difference]: Without dead ends: 1088 [2021-10-29 05:32:33,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:33,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-10-29 05:32:33,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 680. [2021-10-29 05:32:33,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 2.893961708394698) internal successors, (1965), 679 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:33,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1965 transitions. [2021-10-29 05:32:33,672 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1965 transitions. Word has length 26 [2021-10-29 05:32:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:33,672 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 1965 transitions. [2021-10-29 05:32:33,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:33,673 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1965 transitions. [2021-10-29 05:32:33,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:33,677 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:33,677 INFO L513 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] [2021-10-29 05:32:33,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 05:32:33,678 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:33,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:33,678 INFO L85 PathProgramCache]: Analyzing trace with hash 2052734287, now seen corresponding path program 3 times [2021-10-29 05:32:33,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:33,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088480442] [2021-10-29 05:32:33,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:33,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:33,948 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:33,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088480442] [2021-10-29 05:32:33,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088480442] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:33,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:33,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-29 05:32:33,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218315339] [2021-10-29 05:32:33,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 05:32:33,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:33,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 05:32:33,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-29 05:32:33,958 INFO L87 Difference]: Start difference. First operand 680 states and 1965 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:34,218 INFO L93 Difference]: Finished difference Result 1050 states and 2888 transitions. [2021-10-29 05:32:34,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-29 05:32:34,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:34,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:34,229 INFO L225 Difference]: With dead ends: 1050 [2021-10-29 05:32:34,229 INFO L226 Difference]: Without dead ends: 1038 [2021-10-29 05:32:34,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-29 05:32:34,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-10-29 05:32:34,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 750. [2021-10-29 05:32:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 2.897196261682243) internal successors, (2170), 749 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:34,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2170 transitions. [2021-10-29 05:32:34,282 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2170 transitions. Word has length 26 [2021-10-29 05:32:34,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:34,283 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 2170 transitions. [2021-10-29 05:32:34,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2170 transitions. [2021-10-29 05:32:34,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:34,289 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:34,289 INFO L513 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] [2021-10-29 05:32:34,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-29 05:32:34,297 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:34,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:34,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1273929913, now seen corresponding path program 4 times [2021-10-29 05:32:34,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:34,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123723322] [2021-10-29 05:32:34,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:34,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:34,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:34,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:34,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123723322] [2021-10-29 05:32:34,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123723322] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:34,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:34,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-29 05:32:34,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26220162] [2021-10-29 05:32:34,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-29 05:32:34,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:34,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-29 05:32:34,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-29 05:32:34,487 INFO L87 Difference]: Start difference. First operand 750 states and 2170 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:34,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:34,659 INFO L93 Difference]: Finished difference Result 1164 states and 3149 transitions. [2021-10-29 05:32:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-29 05:32:34,660 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:34,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:34,672 INFO L225 Difference]: With dead ends: 1164 [2021-10-29 05:32:34,672 INFO L226 Difference]: Without dead ends: 1132 [2021-10-29 05:32:34,672 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:34,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-10-29 05:32:34,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 788. [2021-10-29 05:32:34,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 2.8475222363405335) internal successors, (2241), 787 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2241 transitions. [2021-10-29 05:32:34,722 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2241 transitions. Word has length 26 [2021-10-29 05:32:34,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:34,722 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 2241 transitions. [2021-10-29 05:32:34,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:34,723 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2241 transitions. [2021-10-29 05:32:34,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:34,727 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:34,727 INFO L513 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] [2021-10-29 05:32:34,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-29 05:32:34,728 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:34,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:34,728 INFO L85 PathProgramCache]: Analyzing trace with hash -147318863, now seen corresponding path program 5 times [2021-10-29 05:32:34,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:34,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646270822] [2021-10-29 05:32:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:34,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:34,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:34,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646270822] [2021-10-29 05:32:34,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646270822] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:34,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:34,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-29 05:32:34,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568962293] [2021-10-29 05:32:34,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-29 05:32:34,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:34,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-29 05:32:34,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-29 05:32:34,862 INFO L87 Difference]: Start difference. First operand 788 states and 2241 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:35,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:35,025 INFO L93 Difference]: Finished difference Result 1092 states and 2874 transitions. [2021-10-29 05:32:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-29 05:32:35,026 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:35,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:35,037 INFO L225 Difference]: With dead ends: 1092 [2021-10-29 05:32:35,037 INFO L226 Difference]: Without dead ends: 1078 [2021-10-29 05:32:35,038 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:35,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-10-29 05:32:35,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 820. [2021-10-29 05:32:35,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 2.752136752136752) internal successors, (2254), 819 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:35,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2254 transitions. [2021-10-29 05:32:35,090 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2254 transitions. Word has length 26 [2021-10-29 05:32:35,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:35,090 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 2254 transitions. [2021-10-29 05:32:35,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2254 transitions. [2021-10-29 05:32:35,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:35,096 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:35,096 INFO L513 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] [2021-10-29 05:32:35,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-29 05:32:35,097 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:35,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:35,097 INFO L85 PathProgramCache]: Analyzing trace with hash 28436583, now seen corresponding path program 6 times [2021-10-29 05:32:35,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:35,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552658882] [2021-10-29 05:32:35,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:35,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:35,276 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:35,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552658882] [2021-10-29 05:32:35,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552658882] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:35,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:35,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-29 05:32:35,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177511360] [2021-10-29 05:32:35,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 05:32:35,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:35,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 05:32:35,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-29 05:32:35,286 INFO L87 Difference]: Start difference. First operand 820 states and 2254 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:35,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:35,500 INFO L93 Difference]: Finished difference Result 1118 states and 2921 transitions. [2021-10-29 05:32:35,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-29 05:32:35,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:35,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:35,512 INFO L225 Difference]: With dead ends: 1118 [2021-10-29 05:32:35,513 INFO L226 Difference]: Without dead ends: 1110 [2021-10-29 05:32:35,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-29 05:32:35,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-10-29 05:32:35,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 824. [2021-10-29 05:32:35,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.72539489671932) internal successors, (2243), 823 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2243 transitions. [2021-10-29 05:32:35,563 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2243 transitions. Word has length 26 [2021-10-29 05:32:35,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:35,566 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 2243 transitions. [2021-10-29 05:32:35,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:35,569 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2243 transitions. [2021-10-29 05:32:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:35,574 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:35,575 INFO L513 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] [2021-10-29 05:32:35,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-29 05:32:35,575 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:35,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:35,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1299544781, now seen corresponding path program 7 times [2021-10-29 05:32:35,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:35,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927582179] [2021-10-29 05:32:35,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:35,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:35,769 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:35,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927582179] [2021-10-29 05:32:35,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927582179] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:35,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:35,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:35,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849743058] [2021-10-29 05:32:35,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:35,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:35,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:35,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:35,772 INFO L87 Difference]: Start difference. First operand 824 states and 2243 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:36,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:36,075 INFO L93 Difference]: Finished difference Result 1146 states and 2980 transitions. [2021-10-29 05:32:36,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-29 05:32:36,076 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:36,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:36,087 INFO L225 Difference]: With dead ends: 1146 [2021-10-29 05:32:36,087 INFO L226 Difference]: Without dead ends: 1130 [2021-10-29 05:32:36,088 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-10-29 05:32:36,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2021-10-29 05:32:36,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 868. [2021-10-29 05:32:36,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 2.7058823529411766) internal successors, (2346), 867 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:36,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2346 transitions. [2021-10-29 05:32:36,164 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2346 transitions. Word has length 26 [2021-10-29 05:32:36,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:36,164 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 2346 transitions. [2021-10-29 05:32:36,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:36,165 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2346 transitions. [2021-10-29 05:32:36,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:36,169 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:36,169 INFO L513 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] [2021-10-29 05:32:36,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-29 05:32:36,170 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:36,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:36,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1661881157, now seen corresponding path program 8 times [2021-10-29 05:32:36,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:36,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410470417] [2021-10-29 05:32:36,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:36,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:36,347 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:36,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410470417] [2021-10-29 05:32:36,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410470417] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:36,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:36,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:36,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130999148] [2021-10-29 05:32:36,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:36,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:36,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:36,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:36,351 INFO L87 Difference]: Start difference. First operand 868 states and 2346 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:36,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:36,685 INFO L93 Difference]: Finished difference Result 1248 states and 3160 transitions. [2021-10-29 05:32:36,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-29 05:32:36,686 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:36,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:36,698 INFO L225 Difference]: With dead ends: 1248 [2021-10-29 05:32:36,698 INFO L226 Difference]: Without dead ends: 1206 [2021-10-29 05:32:36,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-10-29 05:32:36,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-10-29 05:32:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 866. [2021-10-29 05:32:36,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.645086705202312) internal successors, (2288), 865 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:36,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2288 transitions. [2021-10-29 05:32:36,748 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2288 transitions. Word has length 26 [2021-10-29 05:32:36,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:36,749 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 2288 transitions. [2021-10-29 05:32:36,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:36,749 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2288 transitions. [2021-10-29 05:32:36,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:36,753 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:36,753 INFO L513 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] [2021-10-29 05:32:36,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-29 05:32:36,753 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:36,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:36,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1018497167, now seen corresponding path program 9 times [2021-10-29 05:32:36,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:36,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249110712] [2021-10-29 05:32:36,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:36,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:36,963 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:36,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249110712] [2021-10-29 05:32:36,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249110712] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:36,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:36,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:36,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720435884] [2021-10-29 05:32:36,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:36,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:36,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:36,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:36,967 INFO L87 Difference]: Start difference. First operand 866 states and 2288 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:37,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:37,265 INFO L93 Difference]: Finished difference Result 1216 states and 2960 transitions. [2021-10-29 05:32:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-29 05:32:37,266 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:37,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:37,275 INFO L225 Difference]: With dead ends: 1216 [2021-10-29 05:32:37,275 INFO L226 Difference]: Without dead ends: 1130 [2021-10-29 05:32:37,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-10-29 05:32:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2021-10-29 05:32:37,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 800. [2021-10-29 05:32:37,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.599499374217772) internal successors, (2077), 799 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2077 transitions. [2021-10-29 05:32:37,313 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2077 transitions. Word has length 26 [2021-10-29 05:32:37,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:37,313 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 2077 transitions. [2021-10-29 05:32:37,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:37,314 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2077 transitions. [2021-10-29 05:32:37,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:37,317 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:37,317 INFO L513 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] [2021-10-29 05:32:37,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-29 05:32:37,317 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:37,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:37,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1247814497, now seen corresponding path program 10 times [2021-10-29 05:32:37,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:37,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712910778] [2021-10-29 05:32:37,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:37,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:37,497 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:37,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712910778] [2021-10-29 05:32:37,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712910778] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:37,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:37,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:37,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752995529] [2021-10-29 05:32:37,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:37,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:37,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:37,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:37,500 INFO L87 Difference]: Start difference. First operand 800 states and 2077 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:37,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:37,717 INFO L93 Difference]: Finished difference Result 1238 states and 3123 transitions. [2021-10-29 05:32:37,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-29 05:32:37,718 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:37,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:37,727 INFO L225 Difference]: With dead ends: 1238 [2021-10-29 05:32:37,727 INFO L226 Difference]: Without dead ends: 1230 [2021-10-29 05:32:37,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-29 05:32:37,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-10-29 05:32:37,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 796. [2021-10-29 05:32:37,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 2.6) internal successors, (2067), 795 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2067 transitions. [2021-10-29 05:32:37,769 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2067 transitions. Word has length 26 [2021-10-29 05:32:37,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:37,770 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 2067 transitions. [2021-10-29 05:32:37,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:37,770 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2067 transitions. [2021-10-29 05:32:37,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:37,774 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:37,774 INFO L513 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] [2021-10-29 05:32:37,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-29 05:32:37,775 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:37,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:37,775 INFO L85 PathProgramCache]: Analyzing trace with hash 23293701, now seen corresponding path program 11 times [2021-10-29 05:32:37,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:37,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893513040] [2021-10-29 05:32:37,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:37,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:37,933 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:37,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893513040] [2021-10-29 05:32:37,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893513040] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:37,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:37,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:37,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541587459] [2021-10-29 05:32:37,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:37,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:37,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:37,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:37,936 INFO L87 Difference]: Start difference. First operand 796 states and 2067 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:38,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:38,095 INFO L93 Difference]: Finished difference Result 804 states and 2075 transitions. [2021-10-29 05:32:38,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-29 05:32:38,096 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:38,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:38,104 INFO L225 Difference]: With dead ends: 804 [2021-10-29 05:32:38,104 INFO L226 Difference]: Without dead ends: 792 [2021-10-29 05:32:38,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:32:38,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-10-29 05:32:38,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 792. [2021-10-29 05:32:38,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 2.600505689001264) internal successors, (2057), 791 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:38,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2057 transitions. [2021-10-29 05:32:38,139 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2057 transitions. Word has length 26 [2021-10-29 05:32:38,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:38,140 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 2057 transitions. [2021-10-29 05:32:38,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:38,140 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2057 transitions. [2021-10-29 05:32:38,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:38,144 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:38,144 INFO L513 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] [2021-10-29 05:32:38,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-29 05:32:38,145 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:38,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:38,146 INFO L85 PathProgramCache]: Analyzing trace with hash -980653901, now seen corresponding path program 12 times [2021-10-29 05:32:38,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:38,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992247684] [2021-10-29 05:32:38,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:38,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:38,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:38,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992247684] [2021-10-29 05:32:38,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992247684] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:38,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:38,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:38,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225936389] [2021-10-29 05:32:38,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:38,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:38,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:38,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:38,327 INFO L87 Difference]: Start difference. First operand 792 states and 2057 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:38,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:38,470 INFO L93 Difference]: Finished difference Result 804 states and 2071 transitions. [2021-10-29 05:32:38,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-29 05:32:38,471 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:38,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:38,479 INFO L225 Difference]: With dead ends: 804 [2021-10-29 05:32:38,479 INFO L226 Difference]: Without dead ends: 788 [2021-10-29 05:32:38,480 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-29 05:32:38,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-10-29 05:32:38,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 788. [2021-10-29 05:32:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 2.6010165184243963) internal successors, (2047), 787 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:38,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2047 transitions. [2021-10-29 05:32:38,513 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2047 transitions. Word has length 26 [2021-10-29 05:32:38,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:38,514 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 2047 transitions. [2021-10-29 05:32:38,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:38,514 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2047 transitions. [2021-10-29 05:32:38,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:38,518 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:38,518 INFO L513 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] [2021-10-29 05:32:38,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-29 05:32:38,519 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:38,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:38,520 INFO L85 PathProgramCache]: Analyzing trace with hash -370014585, now seen corresponding path program 13 times [2021-10-29 05:32:38,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:38,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647217608] [2021-10-29 05:32:38,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:38,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:38,770 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:38,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647217608] [2021-10-29 05:32:38,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647217608] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:38,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:38,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:38,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88690000] [2021-10-29 05:32:38,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:38,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:38,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:38,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:38,773 INFO L87 Difference]: Start difference. First operand 788 states and 2047 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:38,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:38,964 INFO L93 Difference]: Finished difference Result 794 states and 2054 transitions. [2021-10-29 05:32:38,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-29 05:32:38,965 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:38,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:38,973 INFO L225 Difference]: With dead ends: 794 [2021-10-29 05:32:38,973 INFO L226 Difference]: Without dead ends: 788 [2021-10-29 05:32:38,974 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-10-29 05:32:38,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-10-29 05:32:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 788. [2021-10-29 05:32:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 2.5984752223634056) internal successors, (2045), 787 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2045 transitions. [2021-10-29 05:32:39,006 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2045 transitions. Word has length 26 [2021-10-29 05:32:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:39,006 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 2045 transitions. [2021-10-29 05:32:39,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:39,007 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2045 transitions. [2021-10-29 05:32:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:39,010 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:39,010 INFO L513 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] [2021-10-29 05:32:39,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-29 05:32:39,011 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:39,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:39,012 INFO L85 PathProgramCache]: Analyzing trace with hash 51493947, now seen corresponding path program 14 times [2021-10-29 05:32:39,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:39,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392701099] [2021-10-29 05:32:39,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:39,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:39,199 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:39,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392701099] [2021-10-29 05:32:39,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392701099] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:39,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:39,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:39,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353994525] [2021-10-29 05:32:39,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:39,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:39,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:39,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:39,202 INFO L87 Difference]: Start difference. First operand 788 states and 2045 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:39,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:39,428 INFO L93 Difference]: Finished difference Result 1226 states and 3099 transitions. [2021-10-29 05:32:39,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-29 05:32:39,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:39,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:39,441 INFO L225 Difference]: With dead ends: 1226 [2021-10-29 05:32:39,441 INFO L226 Difference]: Without dead ends: 1210 [2021-10-29 05:32:39,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:32:39,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-29 05:32:39,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 776. [2021-10-29 05:32:39,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 2.606451612903226) internal successors, (2020), 775 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:39,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2020 transitions. [2021-10-29 05:32:39,478 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2020 transitions. Word has length 26 [2021-10-29 05:32:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:39,479 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 2020 transitions. [2021-10-29 05:32:39,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:39,479 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2020 transitions. [2021-10-29 05:32:39,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:39,483 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:39,483 INFO L513 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] [2021-10-29 05:32:39,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-29 05:32:39,484 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:39,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:39,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1704422533, now seen corresponding path program 15 times [2021-10-29 05:32:39,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:39,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723631507] [2021-10-29 05:32:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:39,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:39,624 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:39,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723631507] [2021-10-29 05:32:39,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723631507] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:39,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:39,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:39,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94668304] [2021-10-29 05:32:39,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:39,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:39,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:39,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:39,627 INFO L87 Difference]: Start difference. First operand 776 states and 2020 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:39,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:39,736 INFO L93 Difference]: Finished difference Result 776 states and 2018 transitions. [2021-10-29 05:32:39,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-29 05:32:39,737 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:39,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:39,744 INFO L225 Difference]: With dead ends: 776 [2021-10-29 05:32:39,745 INFO L226 Difference]: Without dead ends: 760 [2021-10-29 05:32:39,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:32:39,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-10-29 05:32:39,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 760. [2021-10-29 05:32:39,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 2.624505928853755) internal successors, (1992), 759 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:39,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1992 transitions. [2021-10-29 05:32:39,774 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1992 transitions. Word has length 26 [2021-10-29 05:32:39,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:39,775 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 1992 transitions. [2021-10-29 05:32:39,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:39,775 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1992 transitions. [2021-10-29 05:32:39,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:39,778 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:39,779 INFO L513 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] [2021-10-29 05:32:39,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-29 05:32:39,779 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:39,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:39,780 INFO L85 PathProgramCache]: Analyzing trace with hash -55865915, now seen corresponding path program 16 times [2021-10-29 05:32:39,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:39,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009092716] [2021-10-29 05:32:39,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:39,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:39,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:39,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009092716] [2021-10-29 05:32:39,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009092716] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:39,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:39,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:39,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731895437] [2021-10-29 05:32:39,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:39,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:39,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:39,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:39,959 INFO L87 Difference]: Start difference. First operand 760 states and 1992 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:40,106 INFO L93 Difference]: Finished difference Result 766 states and 1999 transitions. [2021-10-29 05:32:40,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-29 05:32:40,107 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:40,114 INFO L225 Difference]: With dead ends: 766 [2021-10-29 05:32:40,114 INFO L226 Difference]: Without dead ends: 760 [2021-10-29 05:32:40,115 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:32:40,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-10-29 05:32:40,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 760. [2021-10-29 05:32:40,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 2.6218708827404478) internal successors, (1990), 759 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1990 transitions. [2021-10-29 05:32:40,143 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1990 transitions. Word has length 26 [2021-10-29 05:32:40,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:40,144 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 1990 transitions. [2021-10-29 05:32:40,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:40,144 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1990 transitions. [2021-10-29 05:32:40,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:40,148 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:40,148 INFO L513 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] [2021-10-29 05:32:40,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-29 05:32:40,148 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:40,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:40,149 INFO L85 PathProgramCache]: Analyzing trace with hash 374512411, now seen corresponding path program 17 times [2021-10-29 05:32:40,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:40,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472564228] [2021-10-29 05:32:40,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:40,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:40,320 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:40,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472564228] [2021-10-29 05:32:40,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472564228] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:40,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:40,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:40,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117383910] [2021-10-29 05:32:40,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:40,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:40,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:40,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:40,323 INFO L87 Difference]: Start difference. First operand 760 states and 1990 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:40,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:40,514 INFO L93 Difference]: Finished difference Result 1194 states and 3038 transitions. [2021-10-29 05:32:40,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-29 05:32:40,515 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:40,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:40,526 INFO L225 Difference]: With dead ends: 1194 [2021-10-29 05:32:40,527 INFO L226 Difference]: Without dead ends: 1184 [2021-10-29 05:32:40,527 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-29 05:32:40,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-10-29 05:32:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 754. [2021-10-29 05:32:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.6254980079681274) internal successors, (1977), 753 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:40,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1977 transitions. [2021-10-29 05:32:40,561 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1977 transitions. Word has length 26 [2021-10-29 05:32:40,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:40,562 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1977 transitions. [2021-10-29 05:32:40,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:40,562 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1977 transitions. [2021-10-29 05:32:40,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:40,565 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:40,565 INFO L513 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] [2021-10-29 05:32:40,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-29 05:32:40,566 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:40,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:40,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1003462385, now seen corresponding path program 18 times [2021-10-29 05:32:40,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:40,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811575267] [2021-10-29 05:32:40,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:40,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:40,694 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:40,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811575267] [2021-10-29 05:32:40,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811575267] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:40,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:40,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:40,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107288175] [2021-10-29 05:32:40,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:40,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:40,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:40,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:40,697 INFO L87 Difference]: Start difference. First operand 754 states and 1977 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:40,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:40,807 INFO L93 Difference]: Finished difference Result 754 states and 1975 transitions. [2021-10-29 05:32:40,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-29 05:32:40,808 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:40,820 INFO L225 Difference]: With dead ends: 754 [2021-10-29 05:32:40,829 INFO L226 Difference]: Without dead ends: 736 [2021-10-29 05:32:40,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:32:40,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-10-29 05:32:40,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 736. [2021-10-29 05:32:40,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 2.6476190476190475) internal successors, (1946), 735 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:40,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1946 transitions. [2021-10-29 05:32:40,858 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1946 transitions. Word has length 26 [2021-10-29 05:32:40,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:40,859 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 1946 transitions. [2021-10-29 05:32:40,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:40,859 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1946 transitions. [2021-10-29 05:32:40,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:40,863 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:40,863 INFO L513 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] [2021-10-29 05:32:40,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-29 05:32:40,864 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:40,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:40,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1070492527, now seen corresponding path program 19 times [2021-10-29 05:32:40,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:40,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728449168] [2021-10-29 05:32:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:40,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:40,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:40,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728449168] [2021-10-29 05:32:40,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728449168] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:40,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:40,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-29 05:32:40,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980607547] [2021-10-29 05:32:40,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 05:32:40,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:40,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 05:32:40,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:32:40,970 INFO L87 Difference]: Start difference. First operand 736 states and 1946 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:41,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:41,108 INFO L93 Difference]: Finished difference Result 626 states and 1594 transitions. [2021-10-29 05:32:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-29 05:32:41,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:41,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:41,118 INFO L225 Difference]: With dead ends: 626 [2021-10-29 05:32:41,118 INFO L226 Difference]: Without dead ends: 626 [2021-10-29 05:32:41,119 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-29 05:32:41,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-10-29 05:32:41,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2021-10-29 05:32:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 2.5504) internal successors, (1594), 625 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1594 transitions. [2021-10-29 05:32:41,141 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1594 transitions. Word has length 26 [2021-10-29 05:32:41,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:41,142 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 1594 transitions. [2021-10-29 05:32:41,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:41,142 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1594 transitions. [2021-10-29 05:32:41,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:41,145 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:41,145 INFO L513 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] [2021-10-29 05:32:41,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-29 05:32:41,146 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:41,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:41,146 INFO L85 PathProgramCache]: Analyzing trace with hash -437936799, now seen corresponding path program 20 times [2021-10-29 05:32:41,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:41,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526797797] [2021-10-29 05:32:41,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:41,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:41,336 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:41,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526797797] [2021-10-29 05:32:41,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526797797] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:41,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:41,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 05:32:41,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145195283] [2021-10-29 05:32:41,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 05:32:41,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:41,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 05:32:41,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:32:41,339 INFO L87 Difference]: Start difference. First operand 626 states and 1594 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:41,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:41,406 INFO L93 Difference]: Finished difference Result 687 states and 1703 transitions. [2021-10-29 05:32:41,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:32:41,407 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:41,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:41,408 INFO L225 Difference]: With dead ends: 687 [2021-10-29 05:32:41,409 INFO L226 Difference]: Without dead ends: 266 [2021-10-29 05:32:41,409 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-29 05:32:41,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-10-29 05:32:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2021-10-29 05:32:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.1622641509433964) internal successors, (573), 265 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:41,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 573 transitions. [2021-10-29 05:32:41,419 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 573 transitions. Word has length 26 [2021-10-29 05:32:41,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:41,419 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 573 transitions. [2021-10-29 05:32:41,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:41,420 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 573 transitions. [2021-10-29 05:32:41,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:41,421 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:41,421 INFO L513 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] [2021-10-29 05:32:41,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-29 05:32:41,422 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:41,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:41,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1189257551, now seen corresponding path program 21 times [2021-10-29 05:32:41,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:41,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801577018] [2021-10-29 05:32:41,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:41,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:41,604 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:41,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801577018] [2021-10-29 05:32:41,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801577018] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:41,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:41,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:41,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186149275] [2021-10-29 05:32:41,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:41,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:41,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:41,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:41,608 INFO L87 Difference]: Start difference. First operand 266 states and 573 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:41,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:41,824 INFO L93 Difference]: Finished difference Result 416 states and 872 transitions. [2021-10-29 05:32:41,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-29 05:32:41,825 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:41,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:41,827 INFO L225 Difference]: With dead ends: 416 [2021-10-29 05:32:41,827 INFO L226 Difference]: Without dead ends: 408 [2021-10-29 05:32:41,828 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:32:41,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-10-29 05:32:41,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 264. [2021-10-29 05:32:41,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.1444866920152093) internal successors, (564), 263 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:41,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 564 transitions. [2021-10-29 05:32:41,841 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 564 transitions. Word has length 26 [2021-10-29 05:32:41,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:41,843 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 564 transitions. [2021-10-29 05:32:41,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:41,844 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 564 transitions. [2021-10-29 05:32:41,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:41,845 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:41,845 INFO L513 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] [2021-10-29 05:32:41,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-29 05:32:41,846 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:41,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:41,847 INFO L85 PathProgramCache]: Analyzing trace with hash -2100688019, now seen corresponding path program 22 times [2021-10-29 05:32:41,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:41,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604461898] [2021-10-29 05:32:41,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:41,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:41,999 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:41,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604461898] [2021-10-29 05:32:41,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604461898] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:41,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:42,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:42,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070198620] [2021-10-29 05:32:42,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:42,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:42,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:42,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:42,002 INFO L87 Difference]: Start difference. First operand 264 states and 564 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:42,181 INFO L93 Difference]: Finished difference Result 284 states and 600 transitions. [2021-10-29 05:32:42,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-29 05:32:42,182 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:42,183 INFO L225 Difference]: With dead ends: 284 [2021-10-29 05:32:42,183 INFO L226 Difference]: Without dead ends: 272 [2021-10-29 05:32:42,183 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-10-29 05:32:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-10-29 05:32:42,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 260. [2021-10-29 05:32:42,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.138996138996139) internal successors, (554), 259 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 554 transitions. [2021-10-29 05:32:42,192 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 554 transitions. Word has length 26 [2021-10-29 05:32:42,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:42,192 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 554 transitions. [2021-10-29 05:32:42,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:42,193 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 554 transitions. [2021-10-29 05:32:42,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:42,194 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:42,194 INFO L513 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] [2021-10-29 05:32:42,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-29 05:32:42,195 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:42,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1351039545, now seen corresponding path program 23 times [2021-10-29 05:32:42,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:42,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577423368] [2021-10-29 05:32:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:42,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:42,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:42,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577423368] [2021-10-29 05:32:42,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577423368] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:42,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:42,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:42,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881655784] [2021-10-29 05:32:42,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:42,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:42,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:42,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:42,373 INFO L87 Difference]: Start difference. First operand 260 states and 554 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:42,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:42,542 INFO L93 Difference]: Finished difference Result 276 states and 580 transitions. [2021-10-29 05:32:42,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-29 05:32:42,543 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:42,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:42,544 INFO L225 Difference]: With dead ends: 276 [2021-10-29 05:32:42,544 INFO L226 Difference]: Without dead ends: 260 [2021-10-29 05:32:42,545 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-10-29 05:32:42,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-10-29 05:32:42,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 256. [2021-10-29 05:32:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.1333333333333333) internal successors, (544), 255 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:42,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 544 transitions. [2021-10-29 05:32:42,556 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 544 transitions. Word has length 26 [2021-10-29 05:32:42,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:42,557 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 544 transitions. [2021-10-29 05:32:42,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:42,557 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 544 transitions. [2021-10-29 05:32:42,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:42,558 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:42,559 INFO L513 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] [2021-10-29 05:32:42,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-29 05:32:42,559 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:42,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:42,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1334036889, now seen corresponding path program 24 times [2021-10-29 05:32:42,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:42,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639292565] [2021-10-29 05:32:42,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:42,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:42,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:42,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639292565] [2021-10-29 05:32:42,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639292565] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:42,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:42,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:42,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214447449] [2021-10-29 05:32:42,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:42,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:42,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:42,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:42,720 INFO L87 Difference]: Start difference. First operand 256 states and 544 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:42,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:42,874 INFO L93 Difference]: Finished difference Result 278 states and 581 transitions. [2021-10-29 05:32:42,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-29 05:32:42,875 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:42,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:42,876 INFO L225 Difference]: With dead ends: 278 [2021-10-29 05:32:42,876 INFO L226 Difference]: Without dead ends: 270 [2021-10-29 05:32:42,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-10-29 05:32:42,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-10-29 05:32:42,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 256. [2021-10-29 05:32:42,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.1254901960784314) internal successors, (542), 255 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:42,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 542 transitions. [2021-10-29 05:32:42,885 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 542 transitions. Word has length 26 [2021-10-29 05:32:42,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:42,885 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 542 transitions. [2021-10-29 05:32:42,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:42,886 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 542 transitions. [2021-10-29 05:32:42,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:42,887 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:42,887 INFO L513 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] [2021-10-29 05:32:42,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-29 05:32:42,888 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:42,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:42,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1370542237, now seen corresponding path program 25 times [2021-10-29 05:32:42,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:42,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434684634] [2021-10-29 05:32:42,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:42,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:43,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:43,012 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:43,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434684634] [2021-10-29 05:32:43,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434684634] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:43,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:43,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:43,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574337085] [2021-10-29 05:32:43,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:43,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:43,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:43,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:43,015 INFO L87 Difference]: Start difference. First operand 256 states and 542 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:43,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:43,187 INFO L93 Difference]: Finished difference Result 402 states and 833 transitions. [2021-10-29 05:32:43,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-29 05:32:43,188 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:43,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:43,189 INFO L225 Difference]: With dead ends: 402 [2021-10-29 05:32:43,189 INFO L226 Difference]: Without dead ends: 390 [2021-10-29 05:32:43,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:32:43,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-10-29 05:32:43,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 244. [2021-10-29 05:32:43,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.102880658436214) internal successors, (511), 243 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 511 transitions. [2021-10-29 05:32:43,199 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 511 transitions. Word has length 26 [2021-10-29 05:32:43,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:43,199 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 511 transitions. [2021-10-29 05:32:43,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:43,200 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 511 transitions. [2021-10-29 05:32:43,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:43,201 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:43,201 INFO L513 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] [2021-10-29 05:32:43,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-29 05:32:43,201 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:43,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:43,202 INFO L85 PathProgramCache]: Analyzing trace with hash 320377861, now seen corresponding path program 26 times [2021-10-29 05:32:43,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:43,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164378143] [2021-10-29 05:32:43,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:43,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:43,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:43,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164378143] [2021-10-29 05:32:43,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164378143] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:43,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:43,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:43,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295653381] [2021-10-29 05:32:43,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:43,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:43,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:43,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:43,334 INFO L87 Difference]: Start difference. First operand 244 states and 511 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:43,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:43,493 INFO L93 Difference]: Finished difference Result 270 states and 558 transitions. [2021-10-29 05:32:43,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-29 05:32:43,494 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:43,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:43,495 INFO L225 Difference]: With dead ends: 270 [2021-10-29 05:32:43,495 INFO L226 Difference]: Without dead ends: 252 [2021-10-29 05:32:43,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-10-29 05:32:43,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-10-29 05:32:43,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 222. [2021-10-29 05:32:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.1131221719457014) internal successors, (467), 221 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 467 transitions. [2021-10-29 05:32:43,502 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 467 transitions. Word has length 26 [2021-10-29 05:32:43,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:43,502 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 467 transitions. [2021-10-29 05:32:43,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:43,503 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 467 transitions. [2021-10-29 05:32:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:43,504 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:43,504 INFO L513 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] [2021-10-29 05:32:43,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-29 05:32:43,505 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:43,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:43,505 INFO L85 PathProgramCache]: Analyzing trace with hash 112868405, now seen corresponding path program 27 times [2021-10-29 05:32:43,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:43,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233034148] [2021-10-29 05:32:43,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:43,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:43,584 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:43,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233034148] [2021-10-29 05:32:43,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233034148] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:43,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:43,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-29 05:32:43,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643658769] [2021-10-29 05:32:43,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-29 05:32:43,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:43,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-29 05:32:43,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-29 05:32:43,588 INFO L87 Difference]: Start difference. First operand 222 states and 467 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:43,692 INFO L93 Difference]: Finished difference Result 368 states and 738 transitions. [2021-10-29 05:32:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-29 05:32:43,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:43,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:43,694 INFO L225 Difference]: With dead ends: 368 [2021-10-29 05:32:43,694 INFO L226 Difference]: Without dead ends: 310 [2021-10-29 05:32:43,694 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:43,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-10-29 05:32:43,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 234. [2021-10-29 05:32:43,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.03862660944206) internal successors, (475), 233 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:43,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 475 transitions. [2021-10-29 05:32:43,702 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 475 transitions. Word has length 26 [2021-10-29 05:32:43,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:43,702 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 475 transitions. [2021-10-29 05:32:43,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:43,703 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 475 transitions. [2021-10-29 05:32:43,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:43,704 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:43,705 INFO L513 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] [2021-10-29 05:32:43,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-29 05:32:43,705 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:43,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:43,706 INFO L85 PathProgramCache]: Analyzing trace with hash 212938651, now seen corresponding path program 28 times [2021-10-29 05:32:43,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:43,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353199644] [2021-10-29 05:32:43,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:43,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:43,854 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:43,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353199644] [2021-10-29 05:32:43,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353199644] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:43,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:43,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:43,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535884052] [2021-10-29 05:32:43,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:43,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:43,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:43,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:43,857 INFO L87 Difference]: Start difference. First operand 234 states and 475 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:44,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:44,052 INFO L93 Difference]: Finished difference Result 232 states and 418 transitions. [2021-10-29 05:32:44,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-29 05:32:44,053 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:44,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:44,053 INFO L225 Difference]: With dead ends: 232 [2021-10-29 05:32:44,053 INFO L226 Difference]: Without dead ends: 102 [2021-10-29 05:32:44,054 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-10-29 05:32:44,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-29 05:32:44,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2021-10-29 05:32:44,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.7882352941176471) internal successors, (152), 85 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:44,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 152 transitions. [2021-10-29 05:32:44,056 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 152 transitions. Word has length 26 [2021-10-29 05:32:44,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:44,056 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 152 transitions. [2021-10-29 05:32:44,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:44,057 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 152 transitions. [2021-10-29 05:32:44,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:44,057 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:44,057 INFO L513 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] [2021-10-29 05:32:44,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-29 05:32:44,058 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:44,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:44,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1655944221, now seen corresponding path program 29 times [2021-10-29 05:32:44,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:44,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193358795] [2021-10-29 05:32:44,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:44,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:44,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:44,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193358795] [2021-10-29 05:32:44,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193358795] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:44,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:44,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:44,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504685642] [2021-10-29 05:32:44,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:44,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:44,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:44,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:44,222 INFO L87 Difference]: Start difference. First operand 86 states and 152 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:44,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:44,288 INFO L93 Difference]: Finished difference Result 92 states and 159 transitions. [2021-10-29 05:32:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-29 05:32:44,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:44,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:44,290 INFO L225 Difference]: With dead ends: 92 [2021-10-29 05:32:44,290 INFO L226 Difference]: Without dead ends: 84 [2021-10-29 05:32:44,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:32:44,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-29 05:32:44,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-10-29 05:32:44,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.7710843373493976) internal successors, (147), 83 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:44,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 147 transitions. [2021-10-29 05:32:44,292 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 147 transitions. Word has length 26 [2021-10-29 05:32:44,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:44,293 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 147 transitions. [2021-10-29 05:32:44,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:44,293 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 147 transitions. [2021-10-29 05:32:44,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:44,293 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:44,294 INFO L513 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] [2021-10-29 05:32:44,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-29 05:32:44,294 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:44,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:44,294 INFO L85 PathProgramCache]: Analyzing trace with hash -920503369, now seen corresponding path program 30 times [2021-10-29 05:32:44,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:44,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140890238] [2021-10-29 05:32:44,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:44,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:44,427 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:44,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140890238] [2021-10-29 05:32:44,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140890238] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:44,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:44,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:44,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986803991] [2021-10-29 05:32:44,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:44,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:44,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:44,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:44,429 INFO L87 Difference]: Start difference. First operand 84 states and 147 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:44,498 INFO L93 Difference]: Finished difference Result 88 states and 151 transitions. [2021-10-29 05:32:44,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-29 05:32:44,498 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:44,499 INFO L225 Difference]: With dead ends: 88 [2021-10-29 05:32:44,499 INFO L226 Difference]: Without dead ends: 82 [2021-10-29 05:32:44,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:32:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-29 05:32:44,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-10-29 05:32:44,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.7530864197530864) internal successors, (142), 81 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:44,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 142 transitions. [2021-10-29 05:32:44,502 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 142 transitions. Word has length 26 [2021-10-29 05:32:44,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:44,502 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 142 transitions. [2021-10-29 05:32:44,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:44,503 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 142 transitions. [2021-10-29 05:32:44,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:44,503 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:44,503 INFO L513 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] [2021-10-29 05:32:44,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-29 05:32:44,504 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:44,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:44,504 INFO L85 PathProgramCache]: Analyzing trace with hash -58769523, now seen corresponding path program 31 times [2021-10-29 05:32:44,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:44,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622341405] [2021-10-29 05:32:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:44,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:44,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:44,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622341405] [2021-10-29 05:32:44,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622341405] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:44,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:44,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:44,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395231431] [2021-10-29 05:32:44,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:44,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:44,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:44,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:44,635 INFO L87 Difference]: Start difference. First operand 82 states and 142 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:44,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:44,738 INFO L93 Difference]: Finished difference Result 104 states and 175 transitions. [2021-10-29 05:32:44,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-29 05:32:44,739 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:44,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:44,739 INFO L225 Difference]: With dead ends: 104 [2021-10-29 05:32:44,740 INFO L226 Difference]: Without dead ends: 86 [2021-10-29 05:32:44,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:32:44,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-29 05:32:44,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2021-10-29 05:32:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.7464788732394365) internal successors, (124), 71 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:44,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 124 transitions. [2021-10-29 05:32:44,742 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 124 transitions. Word has length 26 [2021-10-29 05:32:44,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:44,743 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 124 transitions. [2021-10-29 05:32:44,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:44,743 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 124 transitions. [2021-10-29 05:32:44,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:44,744 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:44,744 INFO L513 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] [2021-10-29 05:32:44,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-29 05:32:44,744 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:44,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:44,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1548704625, now seen corresponding path program 32 times [2021-10-29 05:32:44,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:44,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273870489] [2021-10-29 05:32:44,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:44,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:44,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:44,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273870489] [2021-10-29 05:32:44,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273870489] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:44,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:44,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:44,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655150285] [2021-10-29 05:32:44,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:44,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:44,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:44,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:44,895 INFO L87 Difference]: Start difference. First operand 72 states and 124 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:44,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:44,996 INFO L93 Difference]: Finished difference Result 90 states and 147 transitions. [2021-10-29 05:32:44,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-29 05:32:44,996 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:44,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:44,997 INFO L225 Difference]: With dead ends: 90 [2021-10-29 05:32:44,997 INFO L226 Difference]: Without dead ends: 82 [2021-10-29 05:32:44,997 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-29 05:32:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-29 05:32:44,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 68. [2021-10-29 05:32:44,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.7014925373134329) internal successors, (114), 67 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 114 transitions. [2021-10-29 05:32:44,999 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 114 transitions. Word has length 26 [2021-10-29 05:32:44,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:44,999 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 114 transitions. [2021-10-29 05:32:45,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:45,000 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 114 transitions. [2021-10-29 05:32:45,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:45,000 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:45,000 INFO L513 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] [2021-10-29 05:32:45,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-29 05:32:45,001 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:45,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:45,001 INFO L85 PathProgramCache]: Analyzing trace with hash 637274157, now seen corresponding path program 33 times [2021-10-29 05:32:45,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:45,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562159566] [2021-10-29 05:32:45,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:45,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:45,094 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:45,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562159566] [2021-10-29 05:32:45,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562159566] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:45,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:45,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:45,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171837803] [2021-10-29 05:32:45,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:45,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:45,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:45,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:45,096 INFO L87 Difference]: Start difference. First operand 68 states and 114 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:45,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:45,184 INFO L93 Difference]: Finished difference Result 76 states and 122 transitions. [2021-10-29 05:32:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-29 05:32:45,184 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:45,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:45,185 INFO L225 Difference]: With dead ends: 76 [2021-10-29 05:32:45,185 INFO L226 Difference]: Without dead ends: 64 [2021-10-29 05:32:45,185 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:32:45,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-29 05:32:45,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-29 05:32:45,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 63 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:45,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 104 transitions. [2021-10-29 05:32:45,187 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 104 transitions. Word has length 26 [2021-10-29 05:32:45,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:45,188 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 104 transitions. [2021-10-29 05:32:45,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:45,188 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 104 transitions. [2021-10-29 05:32:45,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:45,188 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:45,188 INFO L513 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] [2021-10-29 05:32:45,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-10-29 05:32:45,189 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:45,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1599078249, now seen corresponding path program 34 times [2021-10-29 05:32:45,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:45,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411114505] [2021-10-29 05:32:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:45,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:45,302 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:45,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411114505] [2021-10-29 05:32:45,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411114505] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:45,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:45,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:45,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591477458] [2021-10-29 05:32:45,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:45,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:45,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:45,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:45,305 INFO L87 Difference]: Start difference. First operand 64 states and 104 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:45,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:45,385 INFO L93 Difference]: Finished difference Result 76 states and 118 transitions. [2021-10-29 05:32:45,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-29 05:32:45,386 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:45,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:45,386 INFO L225 Difference]: With dead ends: 76 [2021-10-29 05:32:45,387 INFO L226 Difference]: Without dead ends: 60 [2021-10-29 05:32:45,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-29 05:32:45,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-29 05:32:45,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-29 05:32:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 59 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:45,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 94 transitions. [2021-10-29 05:32:45,389 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 94 transitions. Word has length 26 [2021-10-29 05:32:45,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:45,389 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 94 transitions. [2021-10-29 05:32:45,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:45,389 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 94 transitions. [2021-10-29 05:32:45,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:45,389 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:45,390 INFO L513 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] [2021-10-29 05:32:45,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-10-29 05:32:45,390 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:45,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:45,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1198446383, now seen corresponding path program 35 times [2021-10-29 05:32:45,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:45,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818950305] [2021-10-29 05:32:45,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:45,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:45,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:45,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818950305] [2021-10-29 05:32:45,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818950305] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:45,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:45,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:45,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696779890] [2021-10-29 05:32:45,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:45,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:45,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:45,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:45,520 INFO L87 Difference]: Start difference. First operand 60 states and 94 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:45,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:45,617 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2021-10-29 05:32:45,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-29 05:32:45,617 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:45,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:45,618 INFO L225 Difference]: With dead ends: 66 [2021-10-29 05:32:45,618 INFO L226 Difference]: Without dead ends: 58 [2021-10-29 05:32:45,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:32:45,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-29 05:32:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-10-29 05:32:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 57 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:45,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 89 transitions. [2021-10-29 05:32:45,620 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 89 transitions. Word has length 26 [2021-10-29 05:32:45,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:45,620 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 89 transitions. [2021-10-29 05:32:45,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 89 transitions. [2021-10-29 05:32:45,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:45,621 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:45,621 INFO L513 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] [2021-10-29 05:32:45,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-10-29 05:32:45,621 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:45,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:45,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1735100747, now seen corresponding path program 36 times [2021-10-29 05:32:45,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:45,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128472998] [2021-10-29 05:32:45,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:45,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:45,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:45,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128472998] [2021-10-29 05:32:45,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128472998] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:45,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:45,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:45,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239827732] [2021-10-29 05:32:45,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:45,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:45,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:45,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:45,757 INFO L87 Difference]: Start difference. First operand 58 states and 89 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:45,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:45,859 INFO L93 Difference]: Finished difference Result 68 states and 102 transitions. [2021-10-29 05:32:45,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-29 05:32:45,860 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:45,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:45,860 INFO L225 Difference]: With dead ends: 68 [2021-10-29 05:32:45,860 INFO L226 Difference]: Without dead ends: 60 [2021-10-29 05:32:45,861 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:32:45,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-29 05:32:45,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-10-29 05:32:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.490566037735849) internal successors, (79), 53 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:45,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 79 transitions. [2021-10-29 05:32:45,862 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 79 transitions. Word has length 26 [2021-10-29 05:32:45,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:45,863 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 79 transitions. [2021-10-29 05:32:45,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:45,863 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 79 transitions. [2021-10-29 05:32:45,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:45,863 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:45,863 INFO L513 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] [2021-10-29 05:32:45,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-10-29 05:32:45,864 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:45,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:45,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1300301971, now seen corresponding path program 37 times [2021-10-29 05:32:45,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:45,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960593839] [2021-10-29 05:32:45,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:45,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:45,992 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:45,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960593839] [2021-10-29 05:32:45,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960593839] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:45,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:45,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:45,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610392282] [2021-10-29 05:32:45,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:45,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:45,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:45,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:45,997 INFO L87 Difference]: Start difference. First operand 54 states and 79 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:46,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:46,084 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-10-29 05:32:46,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-29 05:32:46,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:46,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:46,085 INFO L225 Difference]: With dead ends: 54 [2021-10-29 05:32:46,085 INFO L226 Difference]: Without dead ends: 42 [2021-10-29 05:32:46,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:32:46,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-29 05:32:46,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-29 05:32:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 41 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:46,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2021-10-29 05:32:46,086 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 26 [2021-10-29 05:32:46,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:46,086 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2021-10-29 05:32:46,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:46,087 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2021-10-29 05:32:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:46,087 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:46,087 INFO L513 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] [2021-10-29 05:32:46,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-10-29 05:32:46,087 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:46,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:46,087 INFO L85 PathProgramCache]: Analyzing trace with hash -459388049, now seen corresponding path program 38 times [2021-10-29 05:32:46,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:46,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466402998] [2021-10-29 05:32:46,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:46,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:46,212 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:46,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466402998] [2021-10-29 05:32:46,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466402998] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:46,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:46,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:46,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071583335] [2021-10-29 05:32:46,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:46,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:46,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:46,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:46,215 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:46,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:46,266 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-10-29 05:32:46,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-29 05:32:46,266 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:46,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:46,267 INFO L225 Difference]: With dead ends: 48 [2021-10-29 05:32:46,267 INFO L226 Difference]: Without dead ends: 40 [2021-10-29 05:32:46,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:32:46,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-29 05:32:46,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-29 05:32:46,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:46,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2021-10-29 05:32:46,269 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 26 [2021-10-29 05:32:46,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:46,269 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2021-10-29 05:32:46,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:46,270 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2021-10-29 05:32:46,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:46,270 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:46,270 INFO L513 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] [2021-10-29 05:32:46,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-10-29 05:32:46,271 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:46,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:46,271 INFO L85 PathProgramCache]: Analyzing trace with hash 63897185, now seen corresponding path program 39 times [2021-10-29 05:32:46,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:46,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510493961] [2021-10-29 05:32:46,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:46,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:46,385 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:46,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510493961] [2021-10-29 05:32:46,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510493961] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:46,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:46,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:46,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886084035] [2021-10-29 05:32:46,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:46,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:46,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:46,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:46,387 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:46,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:46,436 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-10-29 05:32:46,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-29 05:32:46,437 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:46,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:46,437 INFO L225 Difference]: With dead ends: 44 [2021-10-29 05:32:46,437 INFO L226 Difference]: Without dead ends: 38 [2021-10-29 05:32:46,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:32:46,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-29 05:32:46,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-29 05:32:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:46,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-10-29 05:32:46,439 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 26 [2021-10-29 05:32:46,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:46,439 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-10-29 05:32:46,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:46,440 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-10-29 05:32:46,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:32:46,440 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:32:46,440 INFO L513 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] [2021-10-29 05:32:46,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-10-29 05:32:46,441 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-29 05:32:46,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:32:46,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1348116757, now seen corresponding path program 40 times [2021-10-29 05:32:46,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:32:46,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867084390] [2021-10-29 05:32:46,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:32:46,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:32:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:32:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:32:46,544 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:32:46,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867084390] [2021-10-29 05:32:46,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867084390] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:32:46,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:32:46,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-29 05:32:46,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292251041] [2021-10-29 05:32:46,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:32:46,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:32:46,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:32:46,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:32:46,547 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:46,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:32:46,588 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2021-10-29 05:32:46,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-29 05:32:46,589 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-10-29 05:32:46,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:32:46,589 INFO L225 Difference]: With dead ends: 26 [2021-10-29 05:32:46,589 INFO L226 Difference]: Without dead ends: 0 [2021-10-29 05:32:46,589 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:32:46,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-29 05:32:46,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-29 05:32:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:46,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-29 05:32:46,590 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-10-29 05:32:46,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:32:46,591 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 05:32:46,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:32:46,591 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-29 05:32:46,591 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-29 05:32:46,593 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:32:46,594 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-29 05:32:46,594 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-29 05:32:46,594 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-29 05:32:46,594 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-10-29 05:32:46,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-10-29 05:32:46,597 INFO L731 BasicCegarLoop]: Path program histogram: [40] [2021-10-29 05:32:46,599 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-29 05:32:46,599 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:32:46,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:32:46 BasicIcfg [2021-10-29 05:32:46,603 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:32:46,604 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:32:46,604 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:32:46,604 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:32:46,605 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:32:25" (3/4) ... [2021-10-29 05:32:46,607 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-29 05:32:46,613 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-29 05:32:46,613 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-29 05:32:46,613 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-29 05:32:46,613 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread4 [2021-10-29 05:32:46,620 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-29 05:32:46,621 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-29 05:32:46,621 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-29 05:32:46,621 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-29 05:32:46,671 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563c4705-5d24-4850-acf5-9b32325e2815/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:32:46,671 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:32:46,673 INFO L168 Benchmark]: Toolchain (without parser) took 22856.18 ms. Allocated memory was 94.4 MB in the beginning and 237.0 MB in the end (delta: 142.6 MB). Free memory was 58.9 MB in the beginning and 194.8 MB in the end (delta: -135.9 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:32:46,673 INFO L168 Benchmark]: CDTParser took 1.07 ms. Allocated memory is still 94.4 MB. Free memory was 63.8 MB in the beginning and 63.8 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:32:46,674 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.44 ms. Allocated memory was 94.4 MB in the beginning and 136.3 MB in the end (delta: 41.9 MB). Free memory was 58.6 MB in the beginning and 109.9 MB in the end (delta: -51.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:32:46,674 INFO L168 Benchmark]: Boogie Procedure Inliner took 80.90 ms. Allocated memory is still 136.3 MB. Free memory was 109.9 MB in the beginning and 107.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:32:46,675 INFO L168 Benchmark]: Boogie Preprocessor took 32.07 ms. Allocated memory is still 136.3 MB. Free memory was 107.8 MB in the beginning and 105.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:32:46,676 INFO L168 Benchmark]: RCFGBuilder took 866.47 ms. Allocated memory is still 136.3 MB. Free memory was 105.7 MB in the beginning and 85.5 MB in the end (delta: 20.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-29 05:32:46,676 INFO L168 Benchmark]: TraceAbstraction took 21438.88 ms. Allocated memory was 136.3 MB in the beginning and 237.0 MB in the end (delta: 100.7 MB). Free memory was 85.5 MB in the beginning and 199.0 MB in the end (delta: -113.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:32:46,676 INFO L168 Benchmark]: Witness Printer took 67.26 ms. Allocated memory is still 237.0 MB. Free memory was 199.0 MB in the beginning and 194.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-29 05:32:46,678 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.07 ms. Allocated memory is still 94.4 MB. Free memory was 63.8 MB in the beginning and 63.8 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 361.44 ms. Allocated memory was 94.4 MB in the beginning and 136.3 MB in the end (delta: 41.9 MB). Free memory was 58.6 MB in the beginning and 109.9 MB in the end (delta: -51.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 80.90 ms. Allocated memory is still 136.3 MB. Free memory was 109.9 MB in the beginning and 107.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.07 ms. Allocated memory is still 136.3 MB. Free memory was 107.8 MB in the beginning and 105.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 866.47 ms. Allocated memory is still 136.3 MB. Free memory was 105.7 MB in the beginning and 85.5 MB in the end (delta: 20.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 21438.88 ms. Allocated memory was 136.3 MB in the beginning and 237.0 MB in the end (delta: 100.7 MB). Free memory was 85.5 MB in the beginning and 199.0 MB in the end (delta: -113.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 67.26 ms. Allocated memory is still 237.0 MB. Free memory was 199.0 MB in the beginning and 194.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.2s, 145 PlacesBefore, 44 PlacesAfterwards, 134 TransitionsBefore, 31 TransitionsAfterwards, 1302 CoEnabledTransitionPairs, 7 FixpointIterations, 71 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 0 ConcurrentYvCompositions, 2 ChoiceCompositions, 109 TotalNumberOfCompositions, 3127 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1872, positive: 1768, positive conditional: 0, positive unconditional: 1768, negative: 104, negative conditional: 0, negative unconditional: 104, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 946, positive: 912, positive conditional: 0, positive unconditional: 912, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 946, positive: 878, positive conditional: 0, positive unconditional: 878, negative: 68, negative conditional: 0, negative unconditional: 68, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 68, positive: 34, positive conditional: 0, positive unconditional: 34, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 208, positive: 97, positive conditional: 0, positive unconditional: 97, negative: 110, negative conditional: 0, negative unconditional: 110, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1872, positive: 856, positive conditional: 0, positive unconditional: 856, negative: 70, negative conditional: 0, negative unconditional: 70, unknown: 946, unknown conditional: 0, unknown unconditional: 946] , Statistics on independence cache: Total cache size (in pairs): 103, Positive cache size: 91, Positive conditional cache size: 0, Positive unconditional cache size: 91, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 146]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 166 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 21.2s, OverallIterations: 40, TraceHistogramMax: 1, PathProgramHistogramMax: 40, EmptinessCheckTime: 0.1s, AutomataDifference: 6.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.3s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1350 SDtfs, 1274 SDslu, 4651 SDs, 0 SdLazy, 4401 SolverSat, 856 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 419 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 374 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=868occurred in iteration=7, InterpolantAutomatonStates: 409, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 40 MinimizatonAttempts, 4290 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 1040 NumberOfCodeBlocks, 1040 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 1000 ConstructedInterpolants, 0 QuantifiedInterpolants, 5996 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 40 InterpolantComputations, 40 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-29 05:32:46,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_563c4705-5d24-4850-acf5-9b32325e2815/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...