./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46c3eab-8740-4560-a70b-e8fe75bce984/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46c3eab-8740-4560-a70b-e8fe75bce984/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46c3eab-8740-4560-a70b-e8fe75bce984/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46c3eab-8740-4560-a70b-e8fe75bce984/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46c3eab-8740-4560-a70b-e8fe75bce984/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46c3eab-8740-4560-a70b-e8fe75bce984/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 35eb4fe61244b47e62120cf84d8eaed931ae7a7b0a5140717764703691b11b75 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:47:56,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:47:56,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:47:56,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:47:56,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:47:56,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:47:56,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:47:56,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:47:56,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:47:56,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:47:56,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:47:56,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:47:56,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:47:56,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:47:56,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:47:56,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:47:56,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:47:56,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:47:56,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:47:56,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:47:56,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:47:56,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:47:56,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:47:56,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:47:56,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:47:56,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:47:56,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:47:56,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:47:56,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:47:56,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:47:56,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:47:56,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:47:56,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:47:56,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:47:56,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:47:56,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:47:56,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:47:56,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:47:56,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:47:56,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:47:56,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:47:56,188 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46c3eab-8740-4560-a70b-e8fe75bce984/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:47:56,234 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:47:56,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:47:56,235 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:47:56,235 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:47:56,236 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:47:56,236 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:47:56,236 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:47:56,236 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:47:56,236 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:47:56,237 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:47:56,238 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:47:56,238 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:47:56,238 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:47:56,238 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:47:56,238 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:47:56,239 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:47:56,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:47:56,240 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:47:56,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:47:56,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:47:56,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:47:56,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:47:56,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:47:56,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:47:56,241 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:47:56,241 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:47:56,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:47:56,241 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:47:56,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:47:56,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:47:56,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:47:56,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:47:56,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:47:56,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:47:56,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:47:56,243 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:47:56,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:47:56,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:47:56,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:47:56,244 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:47:56,244 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_d46c3eab-8740-4560-a70b-e8fe75bce984/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46c3eab-8740-4560-a70b-e8fe75bce984/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35eb4fe61244b47e62120cf84d8eaed931ae7a7b0a5140717764703691b11b75 [2021-11-19 15:47:56,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:47:56,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:47:56,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:47:56,580 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:47:56,581 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:47:56,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46c3eab-8740-4560-a70b-e8fe75bce984/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-19 15:47:56,663 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46c3eab-8740-4560-a70b-e8fe75bce984/bin/utaipan-UbGMyvGFUs/data/347b3d704/a0fec1598b474643b7dedaf1236935e6/FLAG388bb45e3 [2021-11-19 15:47:57,203 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:47:57,207 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46c3eab-8740-4560-a70b-e8fe75bce984/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-19 15:47:57,221 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46c3eab-8740-4560-a70b-e8fe75bce984/bin/utaipan-UbGMyvGFUs/data/347b3d704/a0fec1598b474643b7dedaf1236935e6/FLAG388bb45e3 [2021-11-19 15:47:57,480 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46c3eab-8740-4560-a70b-e8fe75bce984/bin/utaipan-UbGMyvGFUs/data/347b3d704/a0fec1598b474643b7dedaf1236935e6 [2021-11-19 15:47:57,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:47:57,485 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:47:57,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:47:57,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:47:57,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:47:57,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:47:57" (1/1) ... [2021-11-19 15:47:57,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@939af0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:57, skipping insertion in model container [2021-11-19 15:47:57,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:47:57" (1/1) ... [2021-11-19 15:47:57,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:47:57,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:47:57,859 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46c3eab-8740-4560-a70b-e8fe75bce984/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[10021,10034] [2021-11-19 15:47:57,987 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:47:58,013 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:47:58,130 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46c3eab-8740-4560-a70b-e8fe75bce984/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[10021,10034] [2021-11-19 15:47:58,195 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:47:58,223 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:47:58,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:58 WrapperNode [2021-11-19 15:47:58,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:47:58,225 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:47:58,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:47:58,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:47:58,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:58" (1/1) ... [2021-11-19 15:47:58,246 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:58" (1/1) ... [2021-11-19 15:47:58,303 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 933 [2021-11-19 15:47:58,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:47:58,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:47:58,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:47:58,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:47:58,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:58" (1/1) ... [2021-11-19 15:47:58,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:58" (1/1) ... [2021-11-19 15:47:58,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:58" (1/1) ... [2021-11-19 15:47:58,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:58" (1/1) ... [2021-11-19 15:47:58,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:58" (1/1) ... [2021-11-19 15:47:58,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:58" (1/1) ... [2021-11-19 15:47:58,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:58" (1/1) ... [2021-11-19 15:47:58,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:47:58,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:47:58,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:47:58,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:47:58,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:58" (1/1) ... [2021-11-19 15:47:58,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:47:58,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46c3eab-8740-4560-a70b-e8fe75bce984/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:47:58,428 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46c3eab-8740-4560-a70b-e8fe75bce984/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:47:58,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46c3eab-8740-4560-a70b-e8fe75bce984/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:47:58,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:47:58,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 15:47:58,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:47:58,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:47:58,585 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:47:58,586 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:47:59,477 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:47:59,776 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:47:59,777 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 15:47:59,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:47:59 BoogieIcfgContainer [2021-11-19 15:47:59,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:47:59,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:47:59,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:47:59,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:47:59,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:47:57" (1/3) ... [2021-11-19 15:47:59,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef9ef44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:47:59, skipping insertion in model container [2021-11-19 15:47:59,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:58" (2/3) ... [2021-11-19 15:47:59,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef9ef44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:47:59, skipping insertion in model container [2021-11-19 15:47:59,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:47:59" (3/3) ... [2021-11-19 15:47:59,791 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-19 15:47:59,800 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:47:59,800 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:47:59,852 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:47:59,859 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 15:47:59,859 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:47:59,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 189 states, 187 states have (on average 1.7112299465240641) internal successors, (320), 188 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:47:59,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 15:47:59,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:47:59,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:47:59,919 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:47:59,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:47:59,925 INFO L85 PathProgramCache]: Analyzing trace with hash -287928466, now seen corresponding path program 1 times [2021-11-19 15:47:59,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:47:59,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612439731] [2021-11-19 15:47:59,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:47:59,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:00,541 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:00,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612439731] [2021-11-19 15:48:00,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612439731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:00,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:00,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 15:48:00,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387352077] [2021-11-19 15:48:00,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:00,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:48:00,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:00,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:48:00,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:48:00,594 INFO L87 Difference]: Start difference. First operand has 189 states, 187 states have (on average 1.7112299465240641) internal successors, (320), 188 states have internal predecessors, (320), 0 states have call successors, (0), 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 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:01,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:01,213 INFO L93 Difference]: Finished difference Result 751 states and 1205 transitions. [2021-11-19 15:48:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:48:01,217 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-19 15:48:01,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:01,244 INFO L225 Difference]: With dead ends: 751 [2021-11-19 15:48:01,244 INFO L226 Difference]: Without dead ends: 643 [2021-11-19 15:48:01,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:48:01,254 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 1655 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1655 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:01,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1655 Valid, 1666 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 15:48:01,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-11-19 15:48:01,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 633. [2021-11-19 15:48:01,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 1.4082278481012658) internal successors, (890), 632 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:01,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 890 transitions. [2021-11-19 15:48:01,401 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 890 transitions. Word has length 81 [2021-11-19 15:48:01,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:01,402 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 890 transitions. [2021-11-19 15:48:01,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:01,403 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 890 transitions. [2021-11-19 15:48:01,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-19 15:48:01,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:01,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:01,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 15:48:01,409 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:01,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:01,410 INFO L85 PathProgramCache]: Analyzing trace with hash 132050834, now seen corresponding path program 1 times [2021-11-19 15:48:01,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:01,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729659697] [2021-11-19 15:48:01,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:01,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:01,605 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:01,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729659697] [2021-11-19 15:48:01,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729659697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:01,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:01,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 15:48:01,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036606173] [2021-11-19 15:48:01,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:01,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:48:01,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:01,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:48:01,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:48:01,609 INFO L87 Difference]: Start difference. First operand 633 states and 890 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:01,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:01,973 INFO L93 Difference]: Finished difference Result 1553 states and 2241 transitions. [2021-11-19 15:48:01,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:48:01,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-19 15:48:01,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:01,980 INFO L225 Difference]: With dead ends: 1553 [2021-11-19 15:48:01,980 INFO L226 Difference]: Without dead ends: 1006 [2021-11-19 15:48:01,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:48:01,999 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 654 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:02,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 270 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:02,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-11-19 15:48:02,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1004. [2021-11-19 15:48:02,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 1.4376869391824527) internal successors, (1442), 1003 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:02,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1442 transitions. [2021-11-19 15:48:02,093 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1442 transitions. Word has length 82 [2021-11-19 15:48:02,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:02,094 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 1442 transitions. [2021-11-19 15:48:02,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1442 transitions. [2021-11-19 15:48:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-19 15:48:02,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:02,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:02,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 15:48:02,099 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:02,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:02,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1214095645, now seen corresponding path program 1 times [2021-11-19 15:48:02,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:02,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110069466] [2021-11-19 15:48:02,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:02,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:02,226 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:02,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110069466] [2021-11-19 15:48:02,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110069466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:02,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:02,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 15:48:02,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018709996] [2021-11-19 15:48:02,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:02,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:48:02,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:02,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:48:02,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:48:02,231 INFO L87 Difference]: Start difference. First operand 1004 states and 1442 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:02,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:02,718 INFO L93 Difference]: Finished difference Result 2636 states and 3862 transitions. [2021-11-19 15:48:02,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:48:02,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-19 15:48:02,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:02,730 INFO L225 Difference]: With dead ends: 2636 [2021-11-19 15:48:02,730 INFO L226 Difference]: Without dead ends: 1748 [2021-11-19 15:48:02,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:48:02,740 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 637 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:02,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 278 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:02,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-11-19 15:48:02,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1746. [2021-11-19 15:48:02,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 1.4567335243553008) internal successors, (2542), 1745 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:02,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2542 transitions. [2021-11-19 15:48:02,916 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2542 transitions. Word has length 82 [2021-11-19 15:48:02,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:02,917 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 2542 transitions. [2021-11-19 15:48:02,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:02,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2542 transitions. [2021-11-19 15:48:02,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-19 15:48:02,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:02,922 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:02,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 15:48:02,923 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:02,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:02,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1555513659, now seen corresponding path program 1 times [2021-11-19 15:48:02,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:02,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775957671] [2021-11-19 15:48:02,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:02,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:03,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:03,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775957671] [2021-11-19 15:48:03,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775957671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:03,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:03,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 15:48:03,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954532153] [2021-11-19 15:48:03,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:03,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:48:03,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:03,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:48:03,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:48:03,070 INFO L87 Difference]: Start difference. First operand 1746 states and 2542 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:03,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:03,628 INFO L93 Difference]: Finished difference Result 4784 states and 7062 transitions. [2021-11-19 15:48:03,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:48:03,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-19 15:48:03,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:03,650 INFO L225 Difference]: With dead ends: 4784 [2021-11-19 15:48:03,651 INFO L226 Difference]: Without dead ends: 3232 [2021-11-19 15:48:03,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:48:03,663 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 644 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:03,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [644 Valid, 287 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:03,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-11-19 15:48:03,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 3230. [2021-11-19 15:48:03,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 3229 states have (on average 1.4673273459275318) internal successors, (4738), 3229 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:03,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 4738 transitions. [2021-11-19 15:48:03,989 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 4738 transitions. Word has length 82 [2021-11-19 15:48:03,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:03,990 INFO L470 AbstractCegarLoop]: Abstraction has 3230 states and 4738 transitions. [2021-11-19 15:48:03,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:03,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 4738 transitions. [2021-11-19 15:48:03,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-19 15:48:03,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:03,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:03,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 15:48:03,993 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:03,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:03,994 INFO L85 PathProgramCache]: Analyzing trace with hash -369548300, now seen corresponding path program 1 times [2021-11-19 15:48:03,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:03,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052005656] [2021-11-19 15:48:03,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:03,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:04,122 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:04,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052005656] [2021-11-19 15:48:04,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052005656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:04,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:04,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 15:48:04,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383968341] [2021-11-19 15:48:04,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:04,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:48:04,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:04,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:48:04,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:48:04,126 INFO L87 Difference]: Start difference. First operand 3230 states and 4738 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:04,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:04,903 INFO L93 Difference]: Finished difference Result 9277 states and 13713 transitions. [2021-11-19 15:48:04,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:48:04,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-19 15:48:04,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:04,943 INFO L225 Difference]: With dead ends: 9277 [2021-11-19 15:48:04,943 INFO L226 Difference]: Without dead ends: 6200 [2021-11-19 15:48:04,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:48:04,950 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 614 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:04,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 286 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:04,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6200 states. [2021-11-19 15:48:05,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6200 to 6198. [2021-11-19 15:48:05,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6198 states, 6197 states have (on average 1.4690979506212682) internal successors, (9104), 6197 states have internal predecessors, (9104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:05,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6198 states to 6198 states and 9104 transitions. [2021-11-19 15:48:05,536 INFO L78 Accepts]: Start accepts. Automaton has 6198 states and 9104 transitions. Word has length 82 [2021-11-19 15:48:05,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:05,537 INFO L470 AbstractCegarLoop]: Abstraction has 6198 states and 9104 transitions. [2021-11-19 15:48:05,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:05,537 INFO L276 IsEmpty]: Start isEmpty. Operand 6198 states and 9104 transitions. [2021-11-19 15:48:05,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-19 15:48:05,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:05,539 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:05,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 15:48:05,540 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:05,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:05,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1738975743, now seen corresponding path program 1 times [2021-11-19 15:48:05,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:05,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886142575] [2021-11-19 15:48:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:05,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:05,675 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:05,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886142575] [2021-11-19 15:48:05,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886142575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:05,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:05,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 15:48:05,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546217896] [2021-11-19 15:48:05,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:05,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:48:05,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:05,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:48:05,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:48:05,679 INFO L87 Difference]: Start difference. First operand 6198 states and 9104 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:07,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:07,080 INFO L93 Difference]: Finished difference Result 18271 states and 26937 transitions. [2021-11-19 15:48:07,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:48:07,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-19 15:48:07,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:07,199 INFO L225 Difference]: With dead ends: 18271 [2021-11-19 15:48:07,199 INFO L226 Difference]: Without dead ends: 12136 [2021-11-19 15:48:07,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:48:07,219 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 641 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:07,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 262 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:48:07,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12136 states. [2021-11-19 15:48:08,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12136 to 12134. [2021-11-19 15:48:08,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12134 states, 12133 states have (on average 1.4622105002884696) internal successors, (17741), 12133 states have internal predecessors, (17741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:08,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12134 states to 12134 states and 17741 transitions. [2021-11-19 15:48:08,396 INFO L78 Accepts]: Start accepts. Automaton has 12134 states and 17741 transitions. Word has length 82 [2021-11-19 15:48:08,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:08,397 INFO L470 AbstractCegarLoop]: Abstraction has 12134 states and 17741 transitions. [2021-11-19 15:48:08,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:08,397 INFO L276 IsEmpty]: Start isEmpty. Operand 12134 states and 17741 transitions. [2021-11-19 15:48:08,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 15:48:08,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:08,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:08,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 15:48:08,400 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:08,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:08,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1616521928, now seen corresponding path program 1 times [2021-11-19 15:48:08,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:08,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062719550] [2021-11-19 15:48:08,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:08,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:08,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:08,468 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:08,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062719550] [2021-11-19 15:48:08,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062719550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:08,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:08,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 15:48:08,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202856678] [2021-11-19 15:48:08,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:08,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:48:08,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:08,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:48:08,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:48:08,470 INFO L87 Difference]: Start difference. First operand 12134 states and 17741 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:09,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:09,754 INFO L93 Difference]: Finished difference Result 24189 states and 35393 transitions. [2021-11-19 15:48:09,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:48:09,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-19 15:48:09,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:09,786 INFO L225 Difference]: With dead ends: 24189 [2021-11-19 15:48:09,786 INFO L226 Difference]: Without dead ends: 12134 [2021-11-19 15:48:09,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:48:09,803 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 533 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:09,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 203 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:48:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12134 states. [2021-11-19 15:48:10,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12134 to 12134. [2021-11-19 15:48:10,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12134 states, 12133 states have (on average 1.4621280804417705) internal successors, (17740), 12133 states have internal predecessors, (17740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12134 states to 12134 states and 17740 transitions. [2021-11-19 15:48:10,628 INFO L78 Accepts]: Start accepts. Automaton has 12134 states and 17740 transitions. Word has length 83 [2021-11-19 15:48:10,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:10,628 INFO L470 AbstractCegarLoop]: Abstraction has 12134 states and 17740 transitions. [2021-11-19 15:48:10,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand 12134 states and 17740 transitions. [2021-11-19 15:48:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 15:48:10,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:10,630 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:10,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 15:48:10,631 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:10,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:10,631 INFO L85 PathProgramCache]: Analyzing trace with hash -779085158, now seen corresponding path program 1 times [2021-11-19 15:48:10,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:10,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482028897] [2021-11-19 15:48:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:10,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:11,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:11,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482028897] [2021-11-19 15:48:11,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482028897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:11,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:11,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 15:48:11,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407551242] [2021-11-19 15:48:11,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:11,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 15:48:11,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:11,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 15:48:11,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-19 15:48:11,595 INFO L87 Difference]: Start difference. First operand 12134 states and 17740 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:15,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:15,038 INFO L93 Difference]: Finished difference Result 25992 states and 37856 transitions. [2021-11-19 15:48:15,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 15:48:15,039 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-19 15:48:15,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:15,108 INFO L225 Difference]: With dead ends: 25992 [2021-11-19 15:48:15,109 INFO L226 Difference]: Without dead ends: 25990 [2021-11-19 15:48:15,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 15:48:15,115 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 1690 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1690 SdHoareTripleChecker+Valid, 2512 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:15,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1690 Valid, 2512 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:48:15,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25990 states. [2021-11-19 15:48:16,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25990 to 19540. [2021-11-19 15:48:16,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19540 states, 19539 states have (on average 1.4556527969701623) internal successors, (28442), 19539 states have internal predecessors, (28442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:16,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19540 states to 19540 states and 28442 transitions. [2021-11-19 15:48:16,685 INFO L78 Accepts]: Start accepts. Automaton has 19540 states and 28442 transitions. Word has length 83 [2021-11-19 15:48:16,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:16,686 INFO L470 AbstractCegarLoop]: Abstraction has 19540 states and 28442 transitions. [2021-11-19 15:48:16,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:16,686 INFO L276 IsEmpty]: Start isEmpty. Operand 19540 states and 28442 transitions. [2021-11-19 15:48:16,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 15:48:16,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:16,688 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:16,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 15:48:16,689 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:16,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:16,689 INFO L85 PathProgramCache]: Analyzing trace with hash -658228550, now seen corresponding path program 1 times [2021-11-19 15:48:16,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:16,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759186829] [2021-11-19 15:48:16,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:16,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:17,602 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:17,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759186829] [2021-11-19 15:48:17,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759186829] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:17,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:17,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 15:48:17,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811680145] [2021-11-19 15:48:17,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:17,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 15:48:17,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:17,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 15:48:17,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-19 15:48:17,606 INFO L87 Difference]: Start difference. First operand 19540 states and 28442 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:20,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:20,480 INFO L93 Difference]: Finished difference Result 29753 states and 43228 transitions. [2021-11-19 15:48:20,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 15:48:20,480 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-19 15:48:20,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:20,566 INFO L225 Difference]: With dead ends: 29753 [2021-11-19 15:48:20,567 INFO L226 Difference]: Without dead ends: 29751 [2021-11-19 15:48:20,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=283, Invalid=839, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 15:48:20,575 INFO L933 BasicCegarLoop]: 409 mSDtfsCounter, 1522 mSDsluCounter, 2881 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 3234 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:20,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1522 Valid, 3234 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 15:48:20,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29751 states. [2021-11-19 15:48:22,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29751 to 19567. [2021-11-19 15:48:22,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19567 states, 19566 states have (on average 1.4553817847286108) internal successors, (28476), 19566 states have internal predecessors, (28476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:22,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19567 states to 19567 states and 28476 transitions. [2021-11-19 15:48:22,390 INFO L78 Accepts]: Start accepts. Automaton has 19567 states and 28476 transitions. Word has length 83 [2021-11-19 15:48:22,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:22,390 INFO L470 AbstractCegarLoop]: Abstraction has 19567 states and 28476 transitions. [2021-11-19 15:48:22,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:22,391 INFO L276 IsEmpty]: Start isEmpty. Operand 19567 states and 28476 transitions. [2021-11-19 15:48:22,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 15:48:22,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:22,392 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:22,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 15:48:22,393 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:22,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:22,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1354915078, now seen corresponding path program 1 times [2021-11-19 15:48:22,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:22,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045060240] [2021-11-19 15:48:22,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:22,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:23,376 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:23,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045060240] [2021-11-19 15:48:23,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045060240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:23,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:23,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 15:48:23,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677802583] [2021-11-19 15:48:23,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:23,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 15:48:23,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:23,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 15:48:23,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-11-19 15:48:23,379 INFO L87 Difference]: Start difference. First operand 19567 states and 28476 transitions. Second operand has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:27,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:27,442 INFO L93 Difference]: Finished difference Result 38928 states and 56506 transitions. [2021-11-19 15:48:27,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 15:48:27,446 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-19 15:48:27,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:27,537 INFO L225 Difference]: With dead ends: 38928 [2021-11-19 15:48:27,537 INFO L226 Difference]: Without dead ends: 38926 [2021-11-19 15:48:27,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=387, Invalid=1095, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 15:48:27,551 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 1579 mSDsluCounter, 2214 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1579 SdHoareTripleChecker+Valid, 2492 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:27,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1579 Valid, 2492 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:48:27,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38926 states. [2021-11-19 15:48:29,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38926 to 19599. [2021-11-19 15:48:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19599 states, 19598 states have (on average 1.4548933564649453) internal successors, (28513), 19598 states have internal predecessors, (28513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:29,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19599 states to 19599 states and 28513 transitions. [2021-11-19 15:48:29,577 INFO L78 Accepts]: Start accepts. Automaton has 19599 states and 28513 transitions. Word has length 83 [2021-11-19 15:48:29,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:29,578 INFO L470 AbstractCegarLoop]: Abstraction has 19599 states and 28513 transitions. [2021-11-19 15:48:29,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:29,578 INFO L276 IsEmpty]: Start isEmpty. Operand 19599 states and 28513 transitions. [2021-11-19 15:48:29,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 15:48:29,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:29,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:29,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 15:48:29,581 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:29,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:29,581 INFO L85 PathProgramCache]: Analyzing trace with hash -907144486, now seen corresponding path program 1 times [2021-11-19 15:48:29,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:29,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627429875] [2021-11-19 15:48:29,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:29,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:30,446 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:30,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627429875] [2021-11-19 15:48:30,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627429875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:30,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:30,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 15:48:30,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397575452] [2021-11-19 15:48:30,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:30,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 15:48:30,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:30,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 15:48:30,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-11-19 15:48:30,448 INFO L87 Difference]: Start difference. First operand 19599 states and 28513 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:33,355 INFO L93 Difference]: Finished difference Result 26314 states and 38180 transitions. [2021-11-19 15:48:33,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 15:48:33,356 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-19 15:48:33,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:33,410 INFO L225 Difference]: With dead ends: 26314 [2021-11-19 15:48:33,411 INFO L226 Difference]: Without dead ends: 24008 [2021-11-19 15:48:33,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2021-11-19 15:48:33,428 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 1309 mSDsluCounter, 3539 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1309 SdHoareTripleChecker+Valid, 3877 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:33,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1309 Valid, 3877 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 15:48:33,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24008 states. [2021-11-19 15:48:35,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24008 to 21732. [2021-11-19 15:48:35,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21732 states, 21731 states have (on average 1.452763333486724) internal successors, (31570), 21731 states have internal predecessors, (31570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:35,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21732 states to 21732 states and 31570 transitions. [2021-11-19 15:48:35,212 INFO L78 Accepts]: Start accepts. Automaton has 21732 states and 31570 transitions. Word has length 83 [2021-11-19 15:48:35,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:35,212 INFO L470 AbstractCegarLoop]: Abstraction has 21732 states and 31570 transitions. [2021-11-19 15:48:35,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand 21732 states and 31570 transitions. [2021-11-19 15:48:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 15:48:35,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:35,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:35,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 15:48:35,215 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:35,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:35,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1407077766, now seen corresponding path program 1 times [2021-11-19 15:48:35,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:35,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907774433] [2021-11-19 15:48:35,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:35,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:35,971 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:35,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907774433] [2021-11-19 15:48:35,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907774433] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:35,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:35,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 15:48:35,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813202536] [2021-11-19 15:48:35,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:35,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 15:48:35,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:35,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 15:48:35,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-19 15:48:35,973 INFO L87 Difference]: Start difference. First operand 21732 states and 31570 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:40,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:40,133 INFO L93 Difference]: Finished difference Result 38989 states and 56674 transitions. [2021-11-19 15:48:40,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 15:48:40,133 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-19 15:48:40,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:40,214 INFO L225 Difference]: With dead ends: 38989 [2021-11-19 15:48:40,214 INFO L226 Difference]: Without dead ends: 38987 [2021-11-19 15:48:40,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 15:48:40,233 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 1356 mSDsluCounter, 3157 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 3531 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:40,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1356 Valid, 3531 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1617 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 15:48:40,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38987 states. [2021-11-19 15:48:42,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38987 to 23587. [2021-11-19 15:48:42,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23587 states, 23586 states have (on average 1.4531501738319341) internal successors, (34274), 23586 states have internal predecessors, (34274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:42,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23587 states to 23587 states and 34274 transitions. [2021-11-19 15:48:42,212 INFO L78 Accepts]: Start accepts. Automaton has 23587 states and 34274 transitions. Word has length 83 [2021-11-19 15:48:42,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:42,212 INFO L470 AbstractCegarLoop]: Abstraction has 23587 states and 34274 transitions. [2021-11-19 15:48:42,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:42,213 INFO L276 IsEmpty]: Start isEmpty. Operand 23587 states and 34274 transitions. [2021-11-19 15:48:42,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 15:48:42,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:42,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:42,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 15:48:42,215 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:42,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:42,216 INFO L85 PathProgramCache]: Analyzing trace with hash 746454210, now seen corresponding path program 1 times [2021-11-19 15:48:42,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:42,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983723672] [2021-11-19 15:48:42,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:42,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:43,080 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:43,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983723672] [2021-11-19 15:48:43,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983723672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:43,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:43,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 15:48:43,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857686226] [2021-11-19 15:48:43,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:43,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 15:48:43,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:43,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 15:48:43,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-19 15:48:43,082 INFO L87 Difference]: Start difference. First operand 23587 states and 34274 transitions. Second operand has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:47,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:47,605 INFO L93 Difference]: Finished difference Result 45763 states and 66651 transitions. [2021-11-19 15:48:47,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 15:48:47,605 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-19 15:48:47,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:47,678 INFO L225 Difference]: With dead ends: 45763 [2021-11-19 15:48:47,678 INFO L226 Difference]: Without dead ends: 45761 [2021-11-19 15:48:47,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=295, Invalid=827, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 15:48:47,691 INFO L933 BasicCegarLoop]: 409 mSDtfsCounter, 2028 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2028 SdHoareTripleChecker+Valid, 1984 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:47,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2028 Valid, 1984 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:48:47,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45761 states. [2021-11-19 15:48:49,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45761 to 26287. [2021-11-19 15:48:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26287 states, 26286 states have (on average 1.454424408430343) internal successors, (38231), 26286 states have internal predecessors, (38231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:49,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26287 states to 26287 states and 38231 transitions. [2021-11-19 15:48:50,000 INFO L78 Accepts]: Start accepts. Automaton has 26287 states and 38231 transitions. Word has length 84 [2021-11-19 15:48:50,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:50,000 INFO L470 AbstractCegarLoop]: Abstraction has 26287 states and 38231 transitions. [2021-11-19 15:48:50,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:50,000 INFO L276 IsEmpty]: Start isEmpty. Operand 26287 states and 38231 transitions. [2021-11-19 15:48:50,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 15:48:50,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:50,003 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:50,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 15:48:50,003 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:50,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:50,004 INFO L85 PathProgramCache]: Analyzing trace with hash -213407002, now seen corresponding path program 1 times [2021-11-19 15:48:50,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:50,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919517958] [2021-11-19 15:48:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:50,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:51,013 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:51,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919517958] [2021-11-19 15:48:51,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919517958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:51,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:51,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 15:48:51,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485604053] [2021-11-19 15:48:51,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:51,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 15:48:51,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:51,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 15:48:51,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:48:51,016 INFO L87 Difference]: Start difference. First operand 26287 states and 38231 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:55,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:55,863 INFO L93 Difference]: Finished difference Result 41980 states and 60904 transitions. [2021-11-19 15:48:55,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 15:48:55,864 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-19 15:48:55,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:55,932 INFO L225 Difference]: With dead ends: 41980 [2021-11-19 15:48:55,932 INFO L226 Difference]: Without dead ends: 41978 [2021-11-19 15:48:55,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 15:48:55,944 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 1460 mSDsluCounter, 3043 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 3406 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:55,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1460 Valid, 3406 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 15:48:55,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41978 states. [2021-11-19 15:48:58,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41978 to 26287. [2021-11-19 15:48:58,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26287 states, 26286 states have (on average 1.454424408430343) internal successors, (38231), 26286 states have internal predecessors, (38231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:58,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26287 states to 26287 states and 38231 transitions. [2021-11-19 15:48:58,093 INFO L78 Accepts]: Start accepts. Automaton has 26287 states and 38231 transitions. Word has length 85 [2021-11-19 15:48:58,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:58,094 INFO L470 AbstractCegarLoop]: Abstraction has 26287 states and 38231 transitions. [2021-11-19 15:48:58,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:58,094 INFO L276 IsEmpty]: Start isEmpty. Operand 26287 states and 38231 transitions. [2021-11-19 15:48:58,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 15:48:58,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:58,096 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:58,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 15:48:58,097 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:58,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:58,097 INFO L85 PathProgramCache]: Analyzing trace with hash -462322938, now seen corresponding path program 1 times [2021-11-19 15:48:58,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:58,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831544452] [2021-11-19 15:48:58,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:58,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:48:59,121 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:59,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831544452] [2021-11-19 15:48:59,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831544452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:59,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:59,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 15:48:59,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375518413] [2021-11-19 15:48:59,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:59,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 15:48:59,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:59,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 15:48:59,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:48:59,123 INFO L87 Difference]: Start difference. First operand 26287 states and 38231 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:03,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:49:03,496 INFO L93 Difference]: Finished difference Result 48318 states and 70112 transitions. [2021-11-19 15:49:03,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 15:49:03,496 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-19 15:49:03,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:49:03,574 INFO L225 Difference]: With dead ends: 48318 [2021-11-19 15:49:03,574 INFO L226 Difference]: Without dead ends: 43708 [2021-11-19 15:49:03,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 15:49:03,595 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 1435 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 2018 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:49:03,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1435 Valid, 2018 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:49:03,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43708 states. [2021-11-19 15:49:06,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43708 to 30329. [2021-11-19 15:49:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30329 states, 30328 states have (on average 1.4518596676338698) internal successors, (44032), 30328 states have internal predecessors, (44032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:06,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30329 states to 30329 states and 44032 transitions. [2021-11-19 15:49:06,430 INFO L78 Accepts]: Start accepts. Automaton has 30329 states and 44032 transitions. Word has length 85 [2021-11-19 15:49:06,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:49:06,430 INFO L470 AbstractCegarLoop]: Abstraction has 30329 states and 44032 transitions. [2021-11-19 15:49:06,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:06,431 INFO L276 IsEmpty]: Start isEmpty. Operand 30329 states and 44032 transitions. [2021-11-19 15:49:06,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 15:49:06,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:49:06,433 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:49:06,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 15:49:06,433 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:49:06,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:49:06,434 INFO L85 PathProgramCache]: Analyzing trace with hash -731010234, now seen corresponding path program 1 times [2021-11-19 15:49:06,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:49:06,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229643184] [2021-11-19 15:49:06,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:06,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:49:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:49:07,388 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:49:07,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229643184] [2021-11-19 15:49:07,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229643184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:49:07,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:49:07,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 15:49:07,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990406946] [2021-11-19 15:49:07,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:49:07,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 15:49:07,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:49:07,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 15:49:07,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-11-19 15:49:07,391 INFO L87 Difference]: Start difference. First operand 30329 states and 44032 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:12,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:49:12,692 INFO L93 Difference]: Finished difference Result 46086 states and 66778 transitions. [2021-11-19 15:49:12,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 15:49:12,693 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-19 15:49:12,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:49:12,775 INFO L225 Difference]: With dead ends: 46086 [2021-11-19 15:49:12,775 INFO L226 Difference]: Without dead ends: 46084 [2021-11-19 15:49:12,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 15:49:12,791 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 1507 mSDsluCounter, 2616 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 2968 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:49:12,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 2968 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 15:49:12,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46084 states. [2021-11-19 15:49:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46084 to 30353. [2021-11-19 15:49:15,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30353 states, 30352 states have (on average 1.4517329994728518) internal successors, (44063), 30352 states have internal predecessors, (44063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30353 states to 30353 states and 44063 transitions. [2021-11-19 15:49:15,744 INFO L78 Accepts]: Start accepts. Automaton has 30353 states and 44063 transitions. Word has length 85 [2021-11-19 15:49:15,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:49:15,745 INFO L470 AbstractCegarLoop]: Abstraction has 30353 states and 44063 transitions. [2021-11-19 15:49:15,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:15,745 INFO L276 IsEmpty]: Start isEmpty. Operand 30353 states and 44063 transitions. [2021-11-19 15:49:15,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 15:49:15,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:49:15,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:49:15,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 15:49:15,748 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:49:15,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:49:15,748 INFO L85 PathProgramCache]: Analyzing trace with hash -283239642, now seen corresponding path program 1 times [2021-11-19 15:49:15,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:49:15,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868658157] [2021-11-19 15:49:15,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:15,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:49:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:49:16,689 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:49:16,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868658157] [2021-11-19 15:49:16,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868658157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:49:16,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:49:16,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 15:49:16,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409906815] [2021-11-19 15:49:16,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:49:16,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 15:49:16,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:49:16,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 15:49:16,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:49:16,691 INFO L87 Difference]: Start difference. First operand 30353 states and 44063 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:21,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:49:21,381 INFO L93 Difference]: Finished difference Result 39222 states and 56810 transitions. [2021-11-19 15:49:21,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 15:49:21,382 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-19 15:49:21,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:49:21,445 INFO L225 Difference]: With dead ends: 39222 [2021-11-19 15:49:21,445 INFO L226 Difference]: Without dead ends: 36916 [2021-11-19 15:49:21,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 15:49:21,461 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 1191 mSDsluCounter, 3479 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 3839 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:49:21,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1191 Valid, 3839 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1419 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 15:49:21,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36916 states. [2021-11-19 15:49:24,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36916 to 30350. [2021-11-19 15:49:24,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30350 states, 30349 states have (on average 1.4517447032851165) internal successors, (44059), 30349 states have internal predecessors, (44059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:24,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30350 states to 30350 states and 44059 transitions. [2021-11-19 15:49:24,409 INFO L78 Accepts]: Start accepts. Automaton has 30350 states and 44059 transitions. Word has length 85 [2021-11-19 15:49:24,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:49:24,409 INFO L470 AbstractCegarLoop]: Abstraction has 30350 states and 44059 transitions. [2021-11-19 15:49:24,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:24,409 INFO L276 IsEmpty]: Start isEmpty. Operand 30350 states and 44059 transitions. [2021-11-19 15:49:24,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 15:49:24,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:49:24,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:49:24,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 15:49:24,412 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:49:24,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:49:24,412 INFO L85 PathProgramCache]: Analyzing trace with hash 578943846, now seen corresponding path program 1 times [2021-11-19 15:49:24,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:49:24,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994317644] [2021-11-19 15:49:24,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:24,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:49:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:49:25,434 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:49:25,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994317644] [2021-11-19 15:49:25,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994317644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:49:25,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:49:25,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-19 15:49:25,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165358951] [2021-11-19 15:49:25,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:49:25,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 15:49:25,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:49:25,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 15:49:25,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-11-19 15:49:25,437 INFO L87 Difference]: Start difference. First operand 30350 states and 44059 transitions. Second operand has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:30,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:49:30,148 INFO L93 Difference]: Finished difference Result 37052 states and 53614 transitions. [2021-11-19 15:49:30,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 15:49:30,149 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-19 15:49:30,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:49:30,208 INFO L225 Difference]: With dead ends: 37052 [2021-11-19 15:49:30,209 INFO L226 Difference]: Without dead ends: 37050 [2021-11-19 15:49:30,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=375, Invalid=1185, Unknown=0, NotChecked=0, Total=1560 [2021-11-19 15:49:30,222 INFO L933 BasicCegarLoop]: 477 mSDtfsCounter, 1362 mSDsluCounter, 3261 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 3698 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:49:30,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1362 Valid, 3698 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 15:49:30,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37050 states. [2021-11-19 15:49:33,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37050 to 31515. [2021-11-19 15:49:33,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31515 states, 31514 states have (on average 1.4503712635653996) internal successors, (45707), 31514 states have internal predecessors, (45707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:33,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31515 states to 31515 states and 45707 transitions. [2021-11-19 15:49:33,320 INFO L78 Accepts]: Start accepts. Automaton has 31515 states and 45707 transitions. Word has length 85 [2021-11-19 15:49:33,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:49:33,321 INFO L470 AbstractCegarLoop]: Abstraction has 31515 states and 45707 transitions. [2021-11-19 15:49:33,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:33,321 INFO L276 IsEmpty]: Start isEmpty. Operand 31515 states and 45707 transitions. [2021-11-19 15:49:33,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 15:49:33,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:49:33,323 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:49:33,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 15:49:33,324 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:49:33,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:49:33,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1755228838, now seen corresponding path program 1 times [2021-11-19 15:49:33,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:49:33,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145443003] [2021-11-19 15:49:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:33,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:49:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:49:34,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:49:34,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145443003] [2021-11-19 15:49:34,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145443003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:49:34,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:49:34,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 15:49:34,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109500040] [2021-11-19 15:49:34,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:49:34,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 15:49:34,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:49:34,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 15:49:34,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:49:34,293 INFO L87 Difference]: Start difference. First operand 31515 states and 45707 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:40,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:49:40,545 INFO L93 Difference]: Finished difference Result 50801 states and 73538 transitions. [2021-11-19 15:49:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 15:49:40,547 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-19 15:49:40,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:49:40,628 INFO L225 Difference]: With dead ends: 50801 [2021-11-19 15:49:40,629 INFO L226 Difference]: Without dead ends: 50799 [2021-11-19 15:49:40,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=371, Invalid=1035, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 15:49:40,638 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 1570 mSDsluCounter, 2047 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 2349 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:49:40,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1570 Valid, 2349 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 15:49:40,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50799 states. [2021-11-19 15:49:43,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50799 to 31530. [2021-11-19 15:49:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31530 states, 31529 states have (on average 1.4503472993117448) internal successors, (45728), 31529 states have internal predecessors, (45728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:43,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31530 states to 31530 states and 45728 transitions. [2021-11-19 15:49:43,809 INFO L78 Accepts]: Start accepts. Automaton has 31530 states and 45728 transitions. Word has length 85 [2021-11-19 15:49:43,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:49:43,809 INFO L470 AbstractCegarLoop]: Abstraction has 31530 states and 45728 transitions. [2021-11-19 15:49:43,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:43,809 INFO L276 IsEmpty]: Start isEmpty. Operand 31530 states and 45728 transitions. [2021-11-19 15:49:43,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 15:49:43,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:49:43,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:49:43,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 15:49:43,811 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:49:43,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:49:43,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1876085446, now seen corresponding path program 1 times [2021-11-19 15:49:43,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:49:43,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562698950] [2021-11-19 15:49:43,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:43,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:49:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:49:44,697 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:49:44,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562698950] [2021-11-19 15:49:44,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562698950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:49:44,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:49:44,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 15:49:44,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957471173] [2021-11-19 15:49:44,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:49:44,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 15:49:44,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:49:44,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 15:49:44,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:49:44,699 INFO L87 Difference]: Start difference. First operand 31530 states and 45728 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:51,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:49:51,362 INFO L93 Difference]: Finished difference Result 58004 states and 84184 transitions. [2021-11-19 15:49:51,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 15:49:51,363 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-19 15:49:51,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:49:51,450 INFO L225 Difference]: With dead ends: 58004 [2021-11-19 15:49:51,450 INFO L226 Difference]: Without dead ends: 58002 [2021-11-19 15:49:51,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 15:49:51,464 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 1464 mSDsluCounter, 3292 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 3631 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:49:51,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1464 Valid, 3631 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 15:49:51,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58002 states. [2021-11-19 15:49:54,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58002 to 31536. [2021-11-19 15:49:54,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31536 states, 31535 states have (on average 1.4502933248771206) internal successors, (45735), 31535 states have internal predecessors, (45735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:54,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31536 states to 31536 states and 45735 transitions. [2021-11-19 15:49:54,931 INFO L78 Accepts]: Start accepts. Automaton has 31536 states and 45735 transitions. Word has length 85 [2021-11-19 15:49:54,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:49:54,932 INFO L470 AbstractCegarLoop]: Abstraction has 31536 states and 45735 transitions. [2021-11-19 15:49:54,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:54,932 INFO L276 IsEmpty]: Start isEmpty. Operand 31536 states and 45735 transitions. [2021-11-19 15:49:54,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 15:49:54,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:49:54,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:49:54,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 15:49:54,934 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:49:54,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:49:54,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1179398918, now seen corresponding path program 1 times [2021-11-19 15:49:54,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:49:54,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105444057] [2021-11-19 15:49:54,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:54,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:49:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:49:56,117 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:49:56,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105444057] [2021-11-19 15:49:56,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105444057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:49:56,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:49:56,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-19 15:49:56,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433344662] [2021-11-19 15:49:56,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:49:56,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 15:49:56,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:49:56,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 15:49:56,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-11-19 15:49:56,120 INFO L87 Difference]: Start difference. First operand 31536 states and 45735 transitions. Second operand has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:50:04,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:04,620 INFO L93 Difference]: Finished difference Result 58124 states and 84313 transitions. [2021-11-19 15:50:04,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 15:50:04,630 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-19 15:50:04,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:04,750 INFO L225 Difference]: With dead ends: 58124 [2021-11-19 15:50:04,750 INFO L226 Difference]: Without dead ends: 58122 [2021-11-19 15:50:04,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=547, Invalid=1805, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 15:50:04,763 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 2351 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2351 SdHoareTripleChecker+Valid, 2376 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:04,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2351 Valid, 2376 Invalid, 2560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 15:50:04,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58122 states. [2021-11-19 15:50:08,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58122 to 31554. [2021-11-19 15:50:08,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31554 states, 31553 states have (on average 1.4502266028586823) internal successors, (45759), 31553 states have internal predecessors, (45759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:50:08,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31554 states to 31554 states and 45759 transitions. [2021-11-19 15:50:08,490 INFO L78 Accepts]: Start accepts. Automaton has 31554 states and 45759 transitions. Word has length 85 [2021-11-19 15:50:08,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:08,490 INFO L470 AbstractCegarLoop]: Abstraction has 31554 states and 45759 transitions. [2021-11-19 15:50:08,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:50:08,490 INFO L276 IsEmpty]: Start isEmpty. Operand 31554 states and 45759 transitions. [2021-11-19 15:50:08,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 15:50:08,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:08,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:08,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-19 15:50:08,493 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:08,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:08,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1627169510, now seen corresponding path program 1 times [2021-11-19 15:50:08,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:50:08,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694845320] [2021-11-19 15:50:08,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:08,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:50:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:09,318 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:50:09,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694845320] [2021-11-19 15:50:09,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694845320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:09,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:09,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 15:50:09,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207136306] [2021-11-19 15:50:09,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:09,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 15:50:09,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:50:09,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 15:50:09,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:50:09,320 INFO L87 Difference]: Start difference. First operand 31554 states and 45759 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:50:16,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:16,884 INFO L93 Difference]: Finished difference Result 60930 states and 88340 transitions. [2021-11-19 15:50:16,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 15:50:16,887 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-19 15:50:16,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:16,985 INFO L225 Difference]: With dead ends: 60930 [2021-11-19 15:50:16,985 INFO L226 Difference]: Without dead ends: 56320 [2021-11-19 15:50:17,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 15:50:17,003 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 1332 mSDsluCounter, 3628 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1332 SdHoareTripleChecker+Valid, 3964 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:17,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1332 Valid, 3964 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 15:50:17,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56320 states. [2021-11-19 15:50:21,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56320 to 33407. [2021-11-19 15:50:21,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33407 states, 33406 states have (on average 1.449679698257798) internal successors, (48428), 33406 states have internal predecessors, (48428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:50:21,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33407 states to 33407 states and 48428 transitions. [2021-11-19 15:50:21,416 INFO L78 Accepts]: Start accepts. Automaton has 33407 states and 48428 transitions. Word has length 85 [2021-11-19 15:50:21,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:21,416 INFO L470 AbstractCegarLoop]: Abstraction has 33407 states and 48428 transitions. [2021-11-19 15:50:21,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:50:21,416 INFO L276 IsEmpty]: Start isEmpty. Operand 33407 states and 48428 transitions. [2021-11-19 15:50:21,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 15:50:21,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:21,419 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:21,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-19 15:50:21,419 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:21,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:21,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1125221102, now seen corresponding path program 1 times [2021-11-19 15:50:21,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:50:21,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640298251] [2021-11-19 15:50:21,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:21,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:50:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:22,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:50:22,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640298251] [2021-11-19 15:50:22,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640298251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:22,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:22,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-19 15:50:22,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898015042] [2021-11-19 15:50:22,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:22,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-19 15:50:22,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:50:22,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-19 15:50:22,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-11-19 15:50:22,777 INFO L87 Difference]: Start difference. First operand 33407 states and 48428 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:50:33,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:33,911 INFO L93 Difference]: Finished difference Result 64793 states and 94146 transitions. [2021-11-19 15:50:33,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 15:50:33,911 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-11-19 15:50:33,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:34,018 INFO L225 Difference]: With dead ends: 64793 [2021-11-19 15:50:34,018 INFO L226 Difference]: Without dead ends: 64791 [2021-11-19 15:50:34,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=509, Invalid=1747, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 15:50:34,033 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 1982 mSDsluCounter, 2526 mSDsCounter, 0 mSdLazyCounter, 3099 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1982 SdHoareTripleChecker+Valid, 2813 SdHoareTripleChecker+Invalid, 3156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:34,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1982 Valid, 2813 Invalid, 3156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3099 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 15:50:34,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64791 states. [2021-11-19 15:50:38,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64791 to 33410. [2021-11-19 15:50:38,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33410 states, 33409 states have (on average 1.4496393187464456) internal successors, (48431), 33409 states have internal predecessors, (48431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:50:38,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33410 states to 33410 states and 48431 transitions. [2021-11-19 15:50:38,992 INFO L78 Accepts]: Start accepts. Automaton has 33410 states and 48431 transitions. Word has length 86 [2021-11-19 15:50:38,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:38,992 INFO L470 AbstractCegarLoop]: Abstraction has 33410 states and 48431 transitions. [2021-11-19 15:50:38,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:50:38,993 INFO L276 IsEmpty]: Start isEmpty. Operand 33410 states and 48431 transitions. [2021-11-19 15:50:38,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 15:50:38,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:38,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:38,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-19 15:50:38,996 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:38,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:38,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1246077710, now seen corresponding path program 1 times [2021-11-19 15:50:38,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:50:38,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956085792] [2021-11-19 15:50:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:38,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:50:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:39,875 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:50:39,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956085792] [2021-11-19 15:50:39,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956085792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:39,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:39,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 15:50:39,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933840537] [2021-11-19 15:50:39,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:39,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 15:50:39,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:50:39,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 15:50:39,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:50:39,878 INFO L87 Difference]: Start difference. First operand 33410 states and 48431 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:50:49,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:49,299 INFO L93 Difference]: Finished difference Result 67484 states and 98090 transitions. [2021-11-19 15:50:49,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 15:50:49,299 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-11-19 15:50:49,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:49,412 INFO L225 Difference]: With dead ends: 67484 [2021-11-19 15:50:49,412 INFO L226 Difference]: Without dead ends: 67482 [2021-11-19 15:50:49,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 15:50:49,427 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 1384 mSDsluCounter, 3282 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1384 SdHoareTripleChecker+Valid, 3621 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:49,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1384 Valid, 3621 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 15:50:49,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67482 states. [2021-11-19 15:50:54,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67482 to 33417. [2021-11-19 15:50:54,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33417 states, 33416 states have (on average 1.4496049796504669) internal successors, (48440), 33416 states have internal predecessors, (48440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:50:54,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33417 states to 33417 states and 48440 transitions. [2021-11-19 15:50:54,617 INFO L78 Accepts]: Start accepts. Automaton has 33417 states and 48440 transitions. Word has length 86 [2021-11-19 15:50:54,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:54,617 INFO L470 AbstractCegarLoop]: Abstraction has 33417 states and 48440 transitions. [2021-11-19 15:50:54,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:50:54,617 INFO L276 IsEmpty]: Start isEmpty. Operand 33417 states and 48440 transitions. [2021-11-19 15:50:54,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 15:50:54,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:54,619 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:54,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-19 15:50:54,619 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:54,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:54,620 INFO L85 PathProgramCache]: Analyzing trace with hash 549391182, now seen corresponding path program 1 times [2021-11-19 15:50:54,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:50:54,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122879574] [2021-11-19 15:50:54,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:54,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:50:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:55,630 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:50:55,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122879574] [2021-11-19 15:50:55,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122879574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:55,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:55,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 15:50:55,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834351535] [2021-11-19 15:50:55,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:55,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 15:50:55,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:50:55,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 15:50:55,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-11-19 15:50:55,633 INFO L87 Difference]: Start difference. First operand 33417 states and 48440 transitions. Second operand has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)