./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.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_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/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_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/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_00edbb9a-db98-4462-873a-a6cbfe79ba78/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 e1221f43edcd55fb28cc2c33b3cd78828237d81c097e561fccaa486cdd56e141 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:28:08,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:28:08,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:28:08,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:28:08,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:28:08,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:28:08,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:28:08,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:28:08,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:28:08,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:28:08,871 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:28:08,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:28:08,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:28:08,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:28:08,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:28:08,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:28:08,887 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:28:08,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:28:08,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:28:08,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:28:08,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:28:08,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:28:08,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:28:08,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:28:08,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:28:08,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:28:08,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:28:08,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:28:08,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:28:08,932 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:28:08,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:28:08,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:28:08,936 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:28:08,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:28:08,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:28:08,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:28:08,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:28:08,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:28:08,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:28:08,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:28:08,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:28:08,946 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:28:08,997 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:28:08,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:28:09,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:28:09,000 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:28:09,001 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:28:09,001 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:28:09,001 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:28:09,001 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:28:09,002 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:28:09,002 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:28:09,003 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:28:09,003 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:28:09,004 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:28:09,004 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:28:09,004 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:28:09,005 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:28:09,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:28:09,006 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:28:09,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:28:09,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:28:09,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:28:09,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:28:09,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:28:09,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:28:09,008 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:28:09,008 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:28:09,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:28:09,008 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:28:09,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:28:09,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:28:09,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:28:09,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:28:09,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:28:09,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:28:09,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:28:09,013 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:28:09,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:28:09,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:28:09,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:28:09,014 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:28:09,014 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_00edbb9a-db98-4462-873a-a6cbfe79ba78/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1221f43edcd55fb28cc2c33b3cd78828237d81c097e561fccaa486cdd56e141 [2021-11-19 14:28:09,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:28:09,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:28:09,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:28:09,380 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:28:09,381 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:28:09,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-19 14:28:09,456 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs/data/6f6aaf85d/bf5a6feb5dde4548b71e24fad70bf4f2/FLAG0c946e4d3 [2021-11-19 14:28:10,045 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:28:10,046 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-19 14:28:10,062 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs/data/6f6aaf85d/bf5a6feb5dde4548b71e24fad70bf4f2/FLAG0c946e4d3 [2021-11-19 14:28:10,327 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs/data/6f6aaf85d/bf5a6feb5dde4548b71e24fad70bf4f2 [2021-11-19 14:28:10,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:28:10,333 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:28:10,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:28:10,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:28:10,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:28:10,348 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:28:10" (1/1) ... [2021-11-19 14:28:10,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a41425f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:10, skipping insertion in model container [2021-11-19 14:28:10,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:28:10" (1/1) ... [2021-11-19 14:28:10,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:28:10,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:28:10,727 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_00edbb9a-db98-4462-873a-a6cbfe79ba78/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2021-11-19 14:28:10,788 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:28:10,812 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:28:10,892 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_00edbb9a-db98-4462-873a-a6cbfe79ba78/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2021-11-19 14:28:10,985 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:28:11,005 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:28:11,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:11 WrapperNode [2021-11-19 14:28:11,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:28:11,008 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:28:11,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:28:11,009 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:28:11,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:11" (1/1) ... [2021-11-19 14:28:11,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:11" (1/1) ... [2021-11-19 14:28:11,132 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 636 [2021-11-19 14:28:11,134 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:28:11,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:28:11,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:28:11,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:28:11,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:11" (1/1) ... [2021-11-19 14:28:11,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:11" (1/1) ... [2021-11-19 14:28:11,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:11" (1/1) ... [2021-11-19 14:28:11,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:11" (1/1) ... [2021-11-19 14:28:11,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:11" (1/1) ... [2021-11-19 14:28:11,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:11" (1/1) ... [2021-11-19 14:28:11,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:11" (1/1) ... [2021-11-19 14:28:11,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:28:11,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:28:11,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:28:11,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:28:11,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:11" (1/1) ... [2021-11-19 14:28:11,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:28:11,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:28:11,256 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:28:11,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:28:11,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:28:11,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:28:11,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:28:11,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:28:11,428 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:28:11,430 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:28:12,244 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:28:12,466 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:28:12,467 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 14:28:12,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:28:12 BoogieIcfgContainer [2021-11-19 14:28:12,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:28:12,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:28:12,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:28:12,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:28:12,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:28:10" (1/3) ... [2021-11-19 14:28:12,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61ba1cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:28:12, skipping insertion in model container [2021-11-19 14:28:12,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:11" (2/3) ... [2021-11-19 14:28:12,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61ba1cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:28:12, skipping insertion in model container [2021-11-19 14:28:12,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:28:12" (3/3) ... [2021-11-19 14:28:12,481 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-19 14:28:12,488 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:28:12,488 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:28:12,545 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:28:12,554 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 14:28:12,554 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:28:12,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 120 states have (on average 1.7083333333333333) internal successors, (205), 121 states have internal predecessors, (205), 0 states have call successors, (0), 0 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 14:28:12,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 14:28:12,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:12,592 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] [2021-11-19 14:28:12,593 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:12,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:12,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1610179573, now seen corresponding path program 1 times [2021-11-19 14:28:12,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:12,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446019909] [2021-11-19 14:28:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:12,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:13,236 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 14:28:13,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:13,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446019909] [2021-11-19 14:28:13,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446019909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:13,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:13,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:28:13,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279898330] [2021-11-19 14:28:13,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:13,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:28:13,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:13,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:28:13,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:28:13,301 INFO L87 Difference]: Start difference. First operand has 122 states, 120 states have (on average 1.7083333333333333) internal successors, (205), 121 states have internal predecessors, (205), 0 states have call successors, (0), 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 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:13,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:13,708 INFO L93 Difference]: Finished difference Result 371 states and 594 transitions. [2021-11-19 14:28:13,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:28:13,711 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-19 14:28:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:13,728 INFO L225 Difference]: With dead ends: 371 [2021-11-19 14:28:13,729 INFO L226 Difference]: Without dead ends: 296 [2021-11-19 14:28:13,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:28:13,737 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 474 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:13,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 717 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:28:13,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-19 14:28:13,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 290. [2021-11-19 14:28:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.3840830449826989) internal successors, (400), 289 states have internal predecessors, (400), 0 states have call successors, (0), 0 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 14:28:13,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 400 transitions. [2021-11-19 14:28:13,822 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 400 transitions. Word has length 52 [2021-11-19 14:28:13,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:13,823 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 400 transitions. [2021-11-19 14:28:13,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:13,824 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 400 transitions. [2021-11-19 14:28:13,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 14:28:13,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:13,828 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] [2021-11-19 14:28:13,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:28:13,829 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:13,830 INFO L85 PathProgramCache]: Analyzing trace with hash 958515962, now seen corresponding path program 1 times [2021-11-19 14:28:13,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:13,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194316378] [2021-11-19 14:28:13,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:13,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:13,974 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 14:28:13,974 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:13,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194316378] [2021-11-19 14:28:13,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194316378] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:13,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:13,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:28:13,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342326766] [2021-11-19 14:28:13,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:13,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:28:13,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:13,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:28:13,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:28:13,982 INFO L87 Difference]: Start difference. First operand 290 states and 400 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:14,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:14,313 INFO L93 Difference]: Finished difference Result 690 states and 982 transitions. [2021-11-19 14:28:14,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:28:14,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-19 14:28:14,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:14,321 INFO L225 Difference]: With dead ends: 690 [2021-11-19 14:28:14,322 INFO L226 Difference]: Without dead ends: 445 [2021-11-19 14:28:14,332 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 14:28:14,335 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 417 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:14,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 167 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:28:14,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-11-19 14:28:14,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 443. [2021-11-19 14:28:14,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.416289592760181) internal successors, (626), 442 states have internal predecessors, (626), 0 states have call successors, (0), 0 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 14:28:14,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 626 transitions. [2021-11-19 14:28:14,462 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 626 transitions. Word has length 53 [2021-11-19 14:28:14,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:14,467 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 626 transitions. [2021-11-19 14:28:14,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:14,469 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 626 transitions. [2021-11-19 14:28:14,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 14:28:14,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:14,481 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] [2021-11-19 14:28:14,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 14:28:14,483 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:14,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:14,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1364861864, now seen corresponding path program 1 times [2021-11-19 14:28:14,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:14,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502430402] [2021-11-19 14:28:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:14,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:14,645 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 14:28:14,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:14,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502430402] [2021-11-19 14:28:14,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502430402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:14,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:14,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:28:14,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472580659] [2021-11-19 14:28:14,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:14,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:28:14,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:14,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:28:14,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:28:14,652 INFO L87 Difference]: Start difference. First operand 443 states and 626 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:14,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:14,935 INFO L93 Difference]: Finished difference Result 1099 states and 1596 transitions. [2021-11-19 14:28:14,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:28:14,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-19 14:28:14,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:14,942 INFO L225 Difference]: With dead ends: 1099 [2021-11-19 14:28:14,942 INFO L226 Difference]: Without dead ends: 751 [2021-11-19 14:28:14,944 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 14:28:14,953 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 389 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:14,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 183 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:28:14,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-11-19 14:28:15,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 749. [2021-11-19 14:28:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.4411764705882353) internal successors, (1078), 748 states have internal predecessors, (1078), 0 states have call successors, (0), 0 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 14:28:15,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1078 transitions. [2021-11-19 14:28:15,088 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1078 transitions. Word has length 53 [2021-11-19 14:28:15,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:15,089 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 1078 transitions. [2021-11-19 14:28:15,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:15,089 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1078 transitions. [2021-11-19 14:28:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 14:28:15,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:15,091 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] [2021-11-19 14:28:15,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 14:28:15,091 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:15,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:15,092 INFO L85 PathProgramCache]: Analyzing trace with hash -980512119, now seen corresponding path program 1 times [2021-11-19 14:28:15,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:15,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680829147] [2021-11-19 14:28:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:15,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:15,192 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 14:28:15,192 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:15,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680829147] [2021-11-19 14:28:15,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680829147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:15,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:15,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:28:15,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447387199] [2021-11-19 14:28:15,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:15,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:28:15,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:15,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:28:15,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:28:15,196 INFO L87 Difference]: Start difference. First operand 749 states and 1078 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:15,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:15,595 INFO L93 Difference]: Finished difference Result 2044 states and 2993 transitions. [2021-11-19 14:28:15,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:28:15,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-19 14:28:15,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:15,606 INFO L225 Difference]: With dead ends: 2044 [2021-11-19 14:28:15,607 INFO L226 Difference]: Without dead ends: 1363 [2021-11-19 14:28:15,608 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 14:28:15,616 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 394 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:15,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 175 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:28:15,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2021-11-19 14:28:15,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1361. [2021-11-19 14:28:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 1.451470588235294) internal successors, (1974), 1360 states have internal predecessors, (1974), 0 states have call successors, (0), 0 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 14:28:15,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 1974 transitions. [2021-11-19 14:28:15,756 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 1974 transitions. Word has length 53 [2021-11-19 14:28:15,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:15,756 INFO L470 AbstractCegarLoop]: Abstraction has 1361 states and 1974 transitions. [2021-11-19 14:28:15,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:15,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 1974 transitions. [2021-11-19 14:28:15,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 14:28:15,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:15,760 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] [2021-11-19 14:28:15,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 14:28:15,761 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:15,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:15,765 INFO L85 PathProgramCache]: Analyzing trace with hash 625335487, now seen corresponding path program 1 times [2021-11-19 14:28:15,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:15,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14743757] [2021-11-19 14:28:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:15,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:16,624 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 14:28:16,624 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:16,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14743757] [2021-11-19 14:28:16,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14743757] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:16,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:16,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-19 14:28:16,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700602052] [2021-11-19 14:28:16,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:16,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 14:28:16,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:16,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 14:28:16,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:28:16,627 INFO L87 Difference]: Start difference. First operand 1361 states and 1974 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:17,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:17,732 INFO L93 Difference]: Finished difference Result 2831 states and 4107 transitions. [2021-11-19 14:28:17,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 14:28:17,733 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-19 14:28:17,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:17,752 INFO L225 Difference]: With dead ends: 2831 [2021-11-19 14:28:17,753 INFO L226 Difference]: Without dead ends: 2829 [2021-11-19 14:28:17,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:28:17,755 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 558 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:17,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 1351 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:28:17,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2021-11-19 14:28:18,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 2177. [2021-11-19 14:28:18,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 1.4494485294117647) internal successors, (3154), 2176 states have internal predecessors, (3154), 0 states have call successors, (0), 0 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 14:28:18,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 3154 transitions. [2021-11-19 14:28:18,055 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 3154 transitions. Word has length 54 [2021-11-19 14:28:18,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:18,055 INFO L470 AbstractCegarLoop]: Abstraction has 2177 states and 3154 transitions. [2021-11-19 14:28:18,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:18,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 3154 transitions. [2021-11-19 14:28:18,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 14:28:18,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:18,057 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] [2021-11-19 14:28:18,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 14:28:18,058 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:18,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:18,058 INFO L85 PathProgramCache]: Analyzing trace with hash 888282239, now seen corresponding path program 1 times [2021-11-19 14:28:18,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:18,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610415863] [2021-11-19 14:28:18,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:18,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:19,295 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 14:28:19,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:19,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610415863] [2021-11-19 14:28:19,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610415863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:19,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:19,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 14:28:19,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283963497] [2021-11-19 14:28:19,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:19,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 14:28:19,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:19,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 14:28:19,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:28:19,298 INFO L87 Difference]: Start difference. First operand 2177 states and 3154 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:21,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:21,671 INFO L93 Difference]: Finished difference Result 2517 states and 3635 transitions. [2021-11-19 14:28:21,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 14:28:21,672 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-19 14:28:21,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:21,689 INFO L225 Difference]: With dead ends: 2517 [2021-11-19 14:28:21,689 INFO L226 Difference]: Without dead ends: 2515 [2021-11-19 14:28:21,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 14:28:21,692 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 676 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:21,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 1279 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1699 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 14:28:21,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-11-19 14:28:21,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2196. [2021-11-19 14:28:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 1.4464692482915718) internal successors, (3175), 2195 states have internal predecessors, (3175), 0 states have call successors, (0), 0 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 14:28:21,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 3175 transitions. [2021-11-19 14:28:21,982 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 3175 transitions. Word has length 54 [2021-11-19 14:28:21,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:21,982 INFO L470 AbstractCegarLoop]: Abstraction has 2196 states and 3175 transitions. [2021-11-19 14:28:21,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 3175 transitions. [2021-11-19 14:28:21,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 14:28:21,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:21,984 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] [2021-11-19 14:28:21,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 14:28:21,985 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:21,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:21,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1661556895, now seen corresponding path program 1 times [2021-11-19 14:28:21,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:21,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805620963] [2021-11-19 14:28:21,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:21,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:23,049 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 14:28:23,049 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:23,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805620963] [2021-11-19 14:28:23,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805620963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:23,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:23,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 14:28:23,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020436764] [2021-11-19 14:28:23,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:23,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 14:28:23,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:23,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 14:28:23,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:28:23,052 INFO L87 Difference]: Start difference. First operand 2196 states and 3175 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:25,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:25,849 INFO L93 Difference]: Finished difference Result 3134 states and 4522 transitions. [2021-11-19 14:28:25,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 14:28:25,850 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-19 14:28:25,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:25,871 INFO L225 Difference]: With dead ends: 3134 [2021-11-19 14:28:25,872 INFO L226 Difference]: Without dead ends: 3132 [2021-11-19 14:28:25,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 14:28:25,875 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 888 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 2292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:25,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 1693 Invalid, 2292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2277 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 14:28:25,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-11-19 14:28:26,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 2212. [2021-11-19 14:28:26,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2211 states have (on average 1.444142921754862) internal successors, (3193), 2211 states have internal predecessors, (3193), 0 states have call successors, (0), 0 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 14:28:26,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3193 transitions. [2021-11-19 14:28:26,136 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3193 transitions. Word has length 54 [2021-11-19 14:28:26,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:26,137 INFO L470 AbstractCegarLoop]: Abstraction has 2212 states and 3193 transitions. [2021-11-19 14:28:26,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:26,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3193 transitions. [2021-11-19 14:28:26,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 14:28:26,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:26,139 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] [2021-11-19 14:28:26,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 14:28:26,140 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:26,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:26,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1653046243, now seen corresponding path program 1 times [2021-11-19 14:28:26,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:26,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292601180] [2021-11-19 14:28:26,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:26,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:26,197 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 14:28:26,197 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:26,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292601180] [2021-11-19 14:28:26,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292601180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:26,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:26,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:28:26,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431853848] [2021-11-19 14:28:26,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:26,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:28:26,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:26,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:28:26,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:28:26,200 INFO L87 Difference]: Start difference. First operand 2212 states and 3193 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:26,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:26,588 INFO L93 Difference]: Finished difference Result 3526 states and 5114 transitions. [2021-11-19 14:28:26,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:28:26,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-19 14:28:26,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:26,605 INFO L225 Difference]: With dead ends: 3526 [2021-11-19 14:28:26,606 INFO L226 Difference]: Without dead ends: 2212 [2021-11-19 14:28:26,611 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 14:28:26,612 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 339 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:26,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 130 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:28:26,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-11-19 14:28:26,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 2212. [2021-11-19 14:28:26,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2211 states have (on average 1.4436906377204886) internal successors, (3192), 2211 states have internal predecessors, (3192), 0 states have call successors, (0), 0 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 14:28:26,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3192 transitions. [2021-11-19 14:28:26,892 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3192 transitions. Word has length 54 [2021-11-19 14:28:26,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:26,892 INFO L470 AbstractCegarLoop]: Abstraction has 2212 states and 3192 transitions. [2021-11-19 14:28:26,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3192 transitions. [2021-11-19 14:28:26,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 14:28:26,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:26,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:28:26,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 14:28:26,895 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:26,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:26,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1947993939, now seen corresponding path program 1 times [2021-11-19 14:28:26,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:26,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935599413] [2021-11-19 14:28:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:26,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:27,385 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 14:28:27,385 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:27,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935599413] [2021-11-19 14:28:27,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935599413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:27,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:27,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-19 14:28:27,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402311459] [2021-11-19 14:28:27,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:27,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 14:28:27,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:27,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 14:28:27,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:28:27,388 INFO L87 Difference]: Start difference. First operand 2212 states and 3192 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:28,559 INFO L93 Difference]: Finished difference Result 4439 states and 6454 transitions. [2021-11-19 14:28:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 14:28:28,560 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-19 14:28:28,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:28,586 INFO L225 Difference]: With dead ends: 4439 [2021-11-19 14:28:28,587 INFO L226 Difference]: Without dead ends: 4437 [2021-11-19 14:28:28,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:28:28,590 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 548 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:28,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 1199 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:28:28,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4437 states. [2021-11-19 14:28:28,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4437 to 2657. [2021-11-19 14:28:28,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2656 states have (on average 1.4476656626506024) internal successors, (3845), 2656 states have internal predecessors, (3845), 0 states have call successors, (0), 0 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 14:28:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 3845 transitions. [2021-11-19 14:28:28,983 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 3845 transitions. Word has length 55 [2021-11-19 14:28:28,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:28,984 INFO L470 AbstractCegarLoop]: Abstraction has 2657 states and 3845 transitions. [2021-11-19 14:28:28,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:28,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 3845 transitions. [2021-11-19 14:28:28,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 14:28:28,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:28,986 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:28:28,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 14:28:28,987 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:28,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:28,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1734606899, now seen corresponding path program 1 times [2021-11-19 14:28:28,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:28,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140811287] [2021-11-19 14:28:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:28,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:29,670 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 14:28:29,671 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:29,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140811287] [2021-11-19 14:28:29,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140811287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:29,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:29,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-19 14:28:29,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648325263] [2021-11-19 14:28:29,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:29,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 14:28:29,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:29,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 14:28:29,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:28:29,673 INFO L87 Difference]: Start difference. First operand 2657 states and 3845 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:30,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:30,600 INFO L93 Difference]: Finished difference Result 4924 states and 7131 transitions. [2021-11-19 14:28:30,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:28:30,601 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-19 14:28:30,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:30,630 INFO L225 Difference]: With dead ends: 4924 [2021-11-19 14:28:30,630 INFO L226 Difference]: Without dead ends: 4922 [2021-11-19 14:28:30,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-11-19 14:28:30,634 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 698 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:30,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 856 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:28:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4922 states. [2021-11-19 14:28:30,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4922 to 2659. [2021-11-19 14:28:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2659 states, 2658 states have (on average 1.4469525959367946) internal successors, (3846), 2658 states have internal predecessors, (3846), 0 states have call successors, (0), 0 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 14:28:30,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 3846 transitions. [2021-11-19 14:28:30,967 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 3846 transitions. Word has length 56 [2021-11-19 14:28:30,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:30,968 INFO L470 AbstractCegarLoop]: Abstraction has 2659 states and 3846 transitions. [2021-11-19 14:28:30,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:30,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 3846 transitions. [2021-11-19 14:28:30,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 14:28:30,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:30,970 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] [2021-11-19 14:28:30,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 14:28:30,970 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:30,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:30,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1787085741, now seen corresponding path program 1 times [2021-11-19 14:28:30,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:30,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758218906] [2021-11-19 14:28:30,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:30,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:31,691 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 14:28:31,691 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:31,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758218906] [2021-11-19 14:28:31,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758218906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:31,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:31,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-19 14:28:31,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932213322] [2021-11-19 14:28:31,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:31,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 14:28:31,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:31,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 14:28:31,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:28:31,694 INFO L87 Difference]: Start difference. First operand 2659 states and 3846 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:32,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:32,962 INFO L93 Difference]: Finished difference Result 4244 states and 6124 transitions. [2021-11-19 14:28:32,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:28:32,963 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-19 14:28:32,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:32,986 INFO L225 Difference]: With dead ends: 4244 [2021-11-19 14:28:32,986 INFO L226 Difference]: Without dead ends: 3538 [2021-11-19 14:28:32,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-11-19 14:28:32,990 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 593 mSDsluCounter, 1450 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:32,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 1672 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:28:32,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2021-11-19 14:28:33,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 2960. [2021-11-19 14:28:33,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2960 states, 2959 states have (on average 1.4464346062859075) internal successors, (4280), 2959 states have internal predecessors, (4280), 0 states have call successors, (0), 0 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 14:28:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2960 states to 2960 states and 4280 transitions. [2021-11-19 14:28:33,295 INFO L78 Accepts]: Start accepts. Automaton has 2960 states and 4280 transitions. Word has length 56 [2021-11-19 14:28:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:33,295 INFO L470 AbstractCegarLoop]: Abstraction has 2960 states and 4280 transitions. [2021-11-19 14:28:33,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:33,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2960 states and 4280 transitions. [2021-11-19 14:28:33,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 14:28:33,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:33,297 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] [2021-11-19 14:28:33,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 14:28:33,298 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:33,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1110967315, now seen corresponding path program 1 times [2021-11-19 14:28:33,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:33,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803531977] [2021-11-19 14:28:33,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:33,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:34,043 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 14:28:34,043 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:34,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803531977] [2021-11-19 14:28:34,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803531977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:34,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:34,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-19 14:28:34,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139260677] [2021-11-19 14:28:34,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:34,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 14:28:34,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:34,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 14:28:34,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:28:34,046 INFO L87 Difference]: Start difference. First operand 2960 states and 4280 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:34,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:34,960 INFO L93 Difference]: Finished difference Result 3509 states and 5048 transitions. [2021-11-19 14:28:34,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:28:34,960 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-19 14:28:34,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:34,970 INFO L225 Difference]: With dead ends: 3509 [2021-11-19 14:28:34,970 INFO L226 Difference]: Without dead ends: 3507 [2021-11-19 14:28:34,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-11-19 14:28:34,972 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 618 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:34,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 1090 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:28:34,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2021-11-19 14:28:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 2973. [2021-11-19 14:28:35,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2973 states, 2972 states have (on average 1.4454912516823688) internal successors, (4296), 2972 states have internal predecessors, (4296), 0 states have call successors, (0), 0 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 14:28:35,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 4296 transitions. [2021-11-19 14:28:35,275 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 4296 transitions. Word has length 56 [2021-11-19 14:28:35,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:35,275 INFO L470 AbstractCegarLoop]: Abstraction has 2973 states and 4296 transitions. [2021-11-19 14:28:35,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 4296 transitions. [2021-11-19 14:28:35,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:28:35,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:35,276 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] [2021-11-19 14:28:35,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 14:28:35,277 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:35,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:35,277 INFO L85 PathProgramCache]: Analyzing trace with hash -326994332, now seen corresponding path program 1 times [2021-11-19 14:28:35,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:35,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580003383] [2021-11-19 14:28:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:35,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:35,320 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 14:28:35,321 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:35,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580003383] [2021-11-19 14:28:35,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580003383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:35,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:35,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:28:35,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347349405] [2021-11-19 14:28:35,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:35,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:28:35,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:35,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:28:35,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:28:35,324 INFO L87 Difference]: Start difference. First operand 2973 states and 4296 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:35,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:35,690 INFO L93 Difference]: Finished difference Result 4928 states and 7165 transitions. [2021-11-19 14:28:35,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:28:35,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-19 14:28:35,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:35,699 INFO L225 Difference]: With dead ends: 4928 [2021-11-19 14:28:35,699 INFO L226 Difference]: Without dead ends: 2856 [2021-11-19 14:28:35,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:28:35,704 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 99 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:35,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 263 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:28:35,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-11-19 14:28:36,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2853. [2021-11-19 14:28:36,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 1.443899018232819) internal successors, (4118), 2852 states have internal predecessors, (4118), 0 states have call successors, (0), 0 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 14:28:36,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 4118 transitions. [2021-11-19 14:28:36,117 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 4118 transitions. Word has length 57 [2021-11-19 14:28:36,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:36,118 INFO L470 AbstractCegarLoop]: Abstraction has 2853 states and 4118 transitions. [2021-11-19 14:28:36,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:36,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 4118 transitions. [2021-11-19 14:28:36,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:28:36,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:36,120 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] [2021-11-19 14:28:36,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 14:28:36,120 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:36,121 INFO L85 PathProgramCache]: Analyzing trace with hash 646219041, now seen corresponding path program 1 times [2021-11-19 14:28:36,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:36,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095953814] [2021-11-19 14:28:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:36,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:36,154 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 14:28:36,154 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:36,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095953814] [2021-11-19 14:28:36,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095953814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:36,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:36,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:28:36,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535107602] [2021-11-19 14:28:36,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:36,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:28:36,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:36,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:28:36,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:28:36,157 INFO L87 Difference]: Start difference. First operand 2853 states and 4118 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:36,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:36,480 INFO L93 Difference]: Finished difference Result 5257 states and 7643 transitions. [2021-11-19 14:28:36,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:28:36,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-19 14:28:36,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:36,485 INFO L225 Difference]: With dead ends: 5257 [2021-11-19 14:28:36,485 INFO L226 Difference]: Without dead ends: 2761 [2021-11-19 14:28:36,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:28:36,491 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 92 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:36,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 263 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:28:36,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-11-19 14:28:36,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2737. [2021-11-19 14:28:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 1.4415204678362572) internal successors, (3944), 2736 states have internal predecessors, (3944), 0 states have call successors, (0), 0 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 14:28:36,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 3944 transitions. [2021-11-19 14:28:36,784 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 3944 transitions. Word has length 57 [2021-11-19 14:28:36,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:36,785 INFO L470 AbstractCegarLoop]: Abstraction has 2737 states and 3944 transitions. [2021-11-19 14:28:36,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:36,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 3944 transitions. [2021-11-19 14:28:36,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:28:36,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:36,786 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] [2021-11-19 14:28:36,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 14:28:36,786 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:36,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:36,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1891723039, now seen corresponding path program 1 times [2021-11-19 14:28:36,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:36,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670577552] [2021-11-19 14:28:36,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:36,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:37,532 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 14:28:37,532 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:37,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670577552] [2021-11-19 14:28:37,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670577552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:37,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:37,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-19 14:28:37,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159398124] [2021-11-19 14:28:37,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:37,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 14:28:37,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:37,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 14:28:37,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:28:37,535 INFO L87 Difference]: Start difference. First operand 2737 states and 3944 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:38,830 INFO L93 Difference]: Finished difference Result 4843 states and 6997 transitions. [2021-11-19 14:28:38,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:28:38,831 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-19 14:28:38,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:38,840 INFO L225 Difference]: With dead ends: 4843 [2021-11-19 14:28:38,840 INFO L226 Difference]: Without dead ends: 4841 [2021-11-19 14:28:38,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-11-19 14:28:38,844 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 364 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:38,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 1239 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:28:38,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4841 states. [2021-11-19 14:28:39,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4841 to 2727. [2021-11-19 14:28:39,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 1.4431401320616288) internal successors, (3934), 2726 states have internal predecessors, (3934), 0 states have call successors, (0), 0 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 14:28:39,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3934 transitions. [2021-11-19 14:28:39,221 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3934 transitions. Word has length 57 [2021-11-19 14:28:39,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:39,222 INFO L470 AbstractCegarLoop]: Abstraction has 2727 states and 3934 transitions. [2021-11-19 14:28:39,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:39,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3934 transitions. [2021-11-19 14:28:39,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:28:39,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:39,224 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] [2021-11-19 14:28:39,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 14:28:39,224 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:39,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:39,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1628776287, now seen corresponding path program 1 times [2021-11-19 14:28:39,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:39,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256520136] [2021-11-19 14:28:39,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:39,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:39,929 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 14:28:39,929 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:39,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256520136] [2021-11-19 14:28:39,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256520136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:39,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:39,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-19 14:28:39,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740926310] [2021-11-19 14:28:39,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:39,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 14:28:39,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:39,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 14:28:39,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:28:39,935 INFO L87 Difference]: Start difference. First operand 2727 states and 3934 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:41,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:41,768 INFO L93 Difference]: Finished difference Result 4538 states and 6544 transitions. [2021-11-19 14:28:41,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:28:41,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-19 14:28:41,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:41,780 INFO L225 Difference]: With dead ends: 4538 [2021-11-19 14:28:41,780 INFO L226 Difference]: Without dead ends: 4536 [2021-11-19 14:28:41,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-11-19 14:28:41,784 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 421 mSDsluCounter, 2134 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 2362 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:41,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 2362 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:28:41,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-11-19 14:28:42,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 2727. [2021-11-19 14:28:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 1.4431401320616288) internal successors, (3934), 2726 states have internal predecessors, (3934), 0 states have call successors, (0), 0 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 14:28:42,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3934 transitions. [2021-11-19 14:28:42,224 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3934 transitions. Word has length 57 [2021-11-19 14:28:42,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:42,225 INFO L470 AbstractCegarLoop]: Abstraction has 2727 states and 3934 transitions. [2021-11-19 14:28:42,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:42,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3934 transitions. [2021-11-19 14:28:42,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:28:42,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:42,227 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] [2021-11-19 14:28:42,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 14:28:42,227 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:42,228 INFO L85 PathProgramCache]: Analyzing trace with hash -855501631, now seen corresponding path program 1 times [2021-11-19 14:28:42,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:42,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043858058] [2021-11-19 14:28:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:42,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:28:42,871 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:42,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043858058] [2021-11-19 14:28:42,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043858058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:42,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:42,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-19 14:28:42,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644221380] [2021-11-19 14:28:42,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:42,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 14:28:42,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:42,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 14:28:42,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:28:42,873 INFO L87 Difference]: Start difference. First operand 2727 states and 3934 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:43,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:43,960 INFO L93 Difference]: Finished difference Result 5952 states and 8617 transitions. [2021-11-19 14:28:43,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:28:43,961 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-19 14:28:43,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:43,971 INFO L225 Difference]: With dead ends: 5952 [2021-11-19 14:28:43,971 INFO L226 Difference]: Without dead ends: 5278 [2021-11-19 14:28:43,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-11-19 14:28:43,975 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 416 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:43,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 1320 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:28:43,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5278 states. [2021-11-19 14:28:44,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5278 to 2999. [2021-11-19 14:28:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 1.438292194796531) internal successors, (4312), 2998 states have internal predecessors, (4312), 0 states have call successors, (0), 0 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 14:28:44,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 4312 transitions. [2021-11-19 14:28:44,466 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 4312 transitions. Word has length 57 [2021-11-19 14:28:44,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:44,466 INFO L470 AbstractCegarLoop]: Abstraction has 2999 states and 4312 transitions. [2021-11-19 14:28:44,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:44,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 4312 transitions. [2021-11-19 14:28:44,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 14:28:44,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:44,468 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] [2021-11-19 14:28:44,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 14:28:44,468 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:44,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:44,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1614820665, now seen corresponding path program 1 times [2021-11-19 14:28:44,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:44,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874877505] [2021-11-19 14:28:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:44,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:47,150 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 14:28:47,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:47,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874877505] [2021-11-19 14:28:47,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874877505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:47,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:47,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-11-19 14:28:47,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734937555] [2021-11-19 14:28:47,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:47,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 14:28:47,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:47,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 14:28:47,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-11-19 14:28:47,152 INFO L87 Difference]: Start difference. First operand 2999 states and 4312 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 14:28:52,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:52,218 INFO L93 Difference]: Finished difference Result 3374 states and 4820 transitions. [2021-11-19 14:28:52,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 14:28:52,218 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-11-19 14:28:52,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:52,222 INFO L225 Difference]: With dead ends: 3374 [2021-11-19 14:28:52,222 INFO L226 Difference]: Without dead ends: 3372 [2021-11-19 14:28:52,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=518, Invalid=2134, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 14:28:52,225 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 927 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 2727 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 2762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:52,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 1465 Invalid, 2762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2727 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:28:52,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2021-11-19 14:28:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 2999. [2021-11-19 14:28:52,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 1.438292194796531) internal successors, (4312), 2998 states have internal predecessors, (4312), 0 states have call successors, (0), 0 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 14:28:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 4312 transitions. [2021-11-19 14:28:52,616 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 4312 transitions. Word has length 58 [2021-11-19 14:28:52,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:52,617 INFO L470 AbstractCegarLoop]: Abstraction has 2999 states and 4312 transitions. [2021-11-19 14:28:52,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 14:28:52,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 4312 transitions. [2021-11-19 14:28:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 14:28:52,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:52,619 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] [2021-11-19 14:28:52,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 14:28:52,619 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:52,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:52,620 INFO L85 PathProgramCache]: Analyzing trace with hash 935271769, now seen corresponding path program 1 times [2021-11-19 14:28:52,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:52,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221741152] [2021-11-19 14:28:52,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:52,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:52,652 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 14:28:52,653 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:52,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221741152] [2021-11-19 14:28:52,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221741152] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:52,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:52,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:28:52,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841057458] [2021-11-19 14:28:52,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:52,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:28:52,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:52,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:28:52,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:28:52,655 INFO L87 Difference]: Start difference. First operand 2999 states and 4312 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 14:28:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:53,207 INFO L93 Difference]: Finished difference Result 5079 states and 7341 transitions. [2021-11-19 14:28:53,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:28:53,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-11-19 14:28:53,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:53,211 INFO L225 Difference]: With dead ends: 5079 [2021-11-19 14:28:53,212 INFO L226 Difference]: Without dead ends: 2855 [2021-11-19 14:28:53,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:28:53,217 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 93 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:53,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 251 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:28:53,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2855 states. [2021-11-19 14:28:53,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 2853. [2021-11-19 14:28:53,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 1.437938288920056) internal successors, (4101), 2852 states have internal predecessors, (4101), 0 states have call successors, (0), 0 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 14:28:53,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 4101 transitions. [2021-11-19 14:28:53,590 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 4101 transitions. Word has length 58 [2021-11-19 14:28:53,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:53,591 INFO L470 AbstractCegarLoop]: Abstraction has 2853 states and 4101 transitions. [2021-11-19 14:28:53,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 14:28:53,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 4101 transitions. [2021-11-19 14:28:53,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 14:28:53,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:53,593 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] [2021-11-19 14:28:53,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 14:28:53,593 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:53,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:53,594 INFO L85 PathProgramCache]: Analyzing trace with hash 907951061, now seen corresponding path program 1 times [2021-11-19 14:28:53,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:53,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847550074] [2021-11-19 14:28:53,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:53,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:54,920 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 14:28:54,920 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:28:54,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847550074] [2021-11-19 14:28:54,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847550074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:54,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:54,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-19 14:28:54,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179716796] [2021-11-19 14:28:54,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:54,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 14:28:54,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:28:54,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 14:28:54,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:28:54,923 INFO L87 Difference]: Start difference. First operand 2853 states and 4101 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:58,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:58,300 INFO L93 Difference]: Finished difference Result 4320 states and 6199 transitions. [2021-11-19 14:28:58,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 14:28:58,300 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-19 14:28:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:58,305 INFO L225 Difference]: With dead ends: 4320 [2021-11-19 14:28:58,305 INFO L226 Difference]: Without dead ends: 4318 [2021-11-19 14:28:58,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=326, Invalid=1396, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 14:28:58,307 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 622 mSDsluCounter, 1695 mSDsCounter, 0 mSdLazyCounter, 2453 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 2479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:58,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 1858 Invalid, 2479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2453 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 14:28:58,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4318 states. [2021-11-19 14:28:58,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4318 to 2849. [2021-11-19 14:28:58,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 1.4382022471910112) internal successors, (4096), 2848 states have internal predecessors, (4096), 0 states have call successors, (0), 0 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 14:28:58,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 4096 transitions. [2021-11-19 14:28:58,657 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 4096 transitions. Word has length 59 [2021-11-19 14:28:58,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:58,658 INFO L470 AbstractCegarLoop]: Abstraction has 2849 states and 4096 transitions. [2021-11-19 14:28:58,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:58,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 4096 transitions. [2021-11-19 14:28:58,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 14:28:58,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:58,659 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] [2021-11-19 14:28:58,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 14:28:58,660 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:58,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:58,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1681225717, now seen corresponding path program 1 times [2021-11-19 14:28:58,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:28:58,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150393414] [2021-11-19 14:28:58,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:58,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:28:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:00,195 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 14:29:00,195 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:00,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150393414] [2021-11-19 14:29:00,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150393414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:00,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:00,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-19 14:29:00,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568859001] [2021-11-19 14:29:00,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:00,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 14:29:00,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:00,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 14:29:00,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-11-19 14:29:00,197 INFO L87 Difference]: Start difference. First operand 2849 states and 4096 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:03,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:03,187 INFO L93 Difference]: Finished difference Result 3775 states and 5422 transitions. [2021-11-19 14:29:03,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 14:29:03,187 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-19 14:29:03,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:03,191 INFO L225 Difference]: With dead ends: 3775 [2021-11-19 14:29:03,191 INFO L226 Difference]: Without dead ends: 3453 [2021-11-19 14:29:03,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=409, Invalid=1661, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 14:29:03,195 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 661 mSDsluCounter, 2143 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 2359 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:03,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 2359 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1494 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:29:03,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3453 states. [2021-11-19 14:29:03,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3453 to 2833. [2021-11-19 14:29:03,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2833 states, 2832 states have (on average 1.440324858757062) internal successors, (4079), 2832 states have internal predecessors, (4079), 0 states have call successors, (0), 0 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 14:29:03,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 4079 transitions. [2021-11-19 14:29:03,543 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 4079 transitions. Word has length 59 [2021-11-19 14:29:03,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:03,543 INFO L470 AbstractCegarLoop]: Abstraction has 2833 states and 4079 transitions. [2021-11-19 14:29:03,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:03,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 4079 transitions. [2021-11-19 14:29:03,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 14:29:03,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:03,545 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] [2021-11-19 14:29:03,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-19 14:29:03,546 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:03,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:03,546 INFO L85 PathProgramCache]: Analyzing trace with hash 284311477, now seen corresponding path program 1 times [2021-11-19 14:29:03,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:03,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302672071] [2021-11-19 14:29:03,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:03,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:05,064 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 14:29:05,065 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:05,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302672071] [2021-11-19 14:29:05,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302672071] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:05,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:05,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-19 14:29:05,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899152028] [2021-11-19 14:29:05,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:05,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 14:29:05,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:05,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 14:29:05,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-11-19 14:29:05,067 INFO L87 Difference]: Start difference. First operand 2833 states and 4079 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:07,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:07,712 INFO L93 Difference]: Finished difference Result 3322 states and 4761 transitions. [2021-11-19 14:29:07,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 14:29:07,713 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-19 14:29:07,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:07,716 INFO L225 Difference]: With dead ends: 3322 [2021-11-19 14:29:07,717 INFO L226 Difference]: Without dead ends: 3320 [2021-11-19 14:29:07,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=416, Invalid=1564, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 14:29:07,719 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 721 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:07,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 1482 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:29:07,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3320 states. [2021-11-19 14:29:08,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3320 to 2833. [2021-11-19 14:29:08,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2833 states, 2832 states have (on average 1.440324858757062) internal successors, (4079), 2832 states have internal predecessors, (4079), 0 states have call successors, (0), 0 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 14:29:08,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 4079 transitions. [2021-11-19 14:29:08,057 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 4079 transitions. Word has length 59 [2021-11-19 14:29:08,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:08,058 INFO L470 AbstractCegarLoop]: Abstraction has 2833 states and 4079 transitions. [2021-11-19 14:29:08,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:08,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 4079 transitions. [2021-11-19 14:29:08,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 14:29:08,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:08,060 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] [2021-11-19 14:29:08,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-19 14:29:08,061 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:08,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:08,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1462131223, now seen corresponding path program 1 times [2021-11-19 14:29:08,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:08,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184931727] [2021-11-19 14:29:08,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:08,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:14,119 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 14:29:14,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:14,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184931727] [2021-11-19 14:29:14,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184931727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:14,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:14,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-11-19 14:29:14,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252245401] [2021-11-19 14:29:14,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:14,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-19 14:29:14,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:14,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-19 14:29:14,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 14:29:14,122 INFO L87 Difference]: Start difference. First operand 2833 states and 4079 transitions. Second operand has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 36 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 14:29:24,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:24,653 INFO L93 Difference]: Finished difference Result 3155 states and 4526 transitions. [2021-11-19 14:29:24,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 14:29:24,654 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 36 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-11-19 14:29:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:24,657 INFO L225 Difference]: With dead ends: 3155 [2021-11-19 14:29:24,657 INFO L226 Difference]: Without dead ends: 3153 [2021-11-19 14:29:24,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=786, Invalid=3246, Unknown=0, NotChecked=0, Total=4032 [2021-11-19 14:29:24,660 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 595 mSDsluCounter, 1924 mSDsCounter, 0 mSdLazyCounter, 4600 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 2053 SdHoareTripleChecker+Invalid, 4619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 4600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:24,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 2053 Invalid, 4619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 4600 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-19 14:29:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3153 states. [2021-11-19 14:29:24,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3153 to 2809. [2021-11-19 14:29:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 2808 states have (on average 1.4433760683760684) internal successors, (4053), 2808 states have internal predecessors, (4053), 0 states have call successors, (0), 0 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 14:29:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 4053 transitions. [2021-11-19 14:29:25,003 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 4053 transitions. Word has length 61 [2021-11-19 14:29:25,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:25,003 INFO L470 AbstractCegarLoop]: Abstraction has 2809 states and 4053 transitions. [2021-11-19 14:29:25,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 36 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 14:29:25,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 4053 transitions. [2021-11-19 14:29:25,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 14:29:25,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:25,005 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:25,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-19 14:29:25,006 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:25,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:25,006 INFO L85 PathProgramCache]: Analyzing trace with hash 687947099, now seen corresponding path program 1 times [2021-11-19 14:29:25,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:25,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101829383] [2021-11-19 14:29:25,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:25,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:25,059 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:25,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101829383] [2021-11-19 14:29:25,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101829383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:25,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:25,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:29:25,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484336645] [2021-11-19 14:29:25,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:25,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:29:25,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:25,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:29:25,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:29:25,062 INFO L87 Difference]: Start difference. First operand 2809 states and 4053 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 14:29:25,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:25,529 INFO L93 Difference]: Finished difference Result 5010 states and 7316 transitions. [2021-11-19 14:29:25,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:29:25,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-19 14:29:25,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:25,534 INFO L225 Difference]: With dead ends: 5010 [2021-11-19 14:29:25,534 INFO L226 Difference]: Without dead ends: 3928 [2021-11-19 14:29:25,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:29:25,537 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 71 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:25,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 312 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:29:25,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2021-11-19 14:29:25,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 3709. [2021-11-19 14:29:25,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3709 states, 3708 states have (on average 1.442556634304207) internal successors, (5349), 3708 states have internal predecessors, (5349), 0 states have call successors, (0), 0 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 14:29:25,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3709 states to 3709 states and 5349 transitions. [2021-11-19 14:29:25,979 INFO L78 Accepts]: Start accepts. Automaton has 3709 states and 5349 transitions. Word has length 63 [2021-11-19 14:29:25,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:25,979 INFO L470 AbstractCegarLoop]: Abstraction has 3709 states and 5349 transitions. [2021-11-19 14:29:25,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 14:29:25,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3709 states and 5349 transitions. [2021-11-19 14:29:25,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 14:29:25,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:25,981 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:25,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-19 14:29:25,981 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:25,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:25,982 INFO L85 PathProgramCache]: Analyzing trace with hash 571946117, now seen corresponding path program 1 times [2021-11-19 14:29:25,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:25,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47579318] [2021-11-19 14:29:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:25,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:26,030 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:26,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47579318] [2021-11-19 14:29:26,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47579318] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:26,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:26,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:29:26,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125039533] [2021-11-19 14:29:26,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:26,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:29:26,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:26,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:29:26,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:29:26,033 INFO L87 Difference]: Start difference. First operand 3709 states and 5349 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 14:29:26,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:26,853 INFO L93 Difference]: Finished difference Result 6823 states and 9931 transitions. [2021-11-19 14:29:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:29:26,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-19 14:29:26,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:26,862 INFO L225 Difference]: With dead ends: 6823 [2021-11-19 14:29:26,862 INFO L226 Difference]: Without dead ends: 4853 [2021-11-19 14:29:26,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:29:26,868 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 67 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:26,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 294 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:29:26,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4853 states. [2021-11-19 14:29:27,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4853 to 4496. [2021-11-19 14:29:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4496 states, 4495 states have (on average 1.439822024471635) internal successors, (6472), 4495 states have internal predecessors, (6472), 0 states have call successors, (0), 0 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 14:29:27,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4496 states to 4496 states and 6472 transitions. [2021-11-19 14:29:27,459 INFO L78 Accepts]: Start accepts. Automaton has 4496 states and 6472 transitions. Word has length 65 [2021-11-19 14:29:27,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:27,460 INFO L470 AbstractCegarLoop]: Abstraction has 4496 states and 6472 transitions. [2021-11-19 14:29:27,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 14:29:27,460 INFO L276 IsEmpty]: Start isEmpty. Operand 4496 states and 6472 transitions. [2021-11-19 14:29:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 14:29:27,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:27,462 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:27,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-19 14:29:27,462 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:27,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:27,463 INFO L85 PathProgramCache]: Analyzing trace with hash -115856907, now seen corresponding path program 1 times [2021-11-19 14:29:27,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:27,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688763404] [2021-11-19 14:29:27,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:27,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:27,504 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:27,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688763404] [2021-11-19 14:29:27,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688763404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:27,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:27,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:29:27,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890552658] [2021-11-19 14:29:27,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:27,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:29:27,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:27,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:29:27,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:29:27,507 INFO L87 Difference]: Start difference. First operand 4496 states and 6472 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:28,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:28,663 INFO L93 Difference]: Finished difference Result 8702 states and 12505 transitions. [2021-11-19 14:29:28,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:29:28,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-19 14:29:28,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:28,674 INFO L225 Difference]: With dead ends: 8702 [2021-11-19 14:29:28,675 INFO L226 Difference]: Without dead ends: 6208 [2021-11-19 14:29:28,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:29:28,681 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 67 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:28,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 300 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:29:28,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6208 states. [2021-11-19 14:29:29,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6208 to 6206. [2021-11-19 14:29:29,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6206 states, 6205 states have (on average 1.424818694601128) internal successors, (8841), 6205 states have internal predecessors, (8841), 0 states have call successors, (0), 0 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 14:29:29,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6206 states to 6206 states and 8841 transitions. [2021-11-19 14:29:29,462 INFO L78 Accepts]: Start accepts. Automaton has 6206 states and 8841 transitions. Word has length 68 [2021-11-19 14:29:29,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:29,463 INFO L470 AbstractCegarLoop]: Abstraction has 6206 states and 8841 transitions. [2021-11-19 14:29:29,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:29,463 INFO L276 IsEmpty]: Start isEmpty. Operand 6206 states and 8841 transitions. [2021-11-19 14:29:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 14:29:29,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:29,465 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:29,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-19 14:29:29,466 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:29,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:29,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1887839819, now seen corresponding path program 1 times [2021-11-19 14:29:29,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:29,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799762703] [2021-11-19 14:29:29,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:29,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:29,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:29,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799762703] [2021-11-19 14:29:29,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799762703] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:29,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:29,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:29:29,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502054292] [2021-11-19 14:29:29,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:29,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:29:29,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:29,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:29:29,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:29:29,517 INFO L87 Difference]: Start difference. First operand 6206 states and 8841 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:30,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:30,649 INFO L93 Difference]: Finished difference Result 12732 states and 18279 transitions. [2021-11-19 14:29:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:29:30,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-19 14:29:30,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:30,661 INFO L225 Difference]: With dead ends: 12732 [2021-11-19 14:29:30,661 INFO L226 Difference]: Without dead ends: 8602 [2021-11-19 14:29:30,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:29:30,668 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 62 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:30,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 275 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:29:30,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8602 states. [2021-11-19 14:29:31,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8602 to 7848. [2021-11-19 14:29:31,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7848 states, 7847 states have (on average 1.416974639989805) internal successors, (11119), 7847 states have internal predecessors, (11119), 0 states have call successors, (0), 0 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 14:29:31,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7848 states to 7848 states and 11119 transitions. [2021-11-19 14:29:31,655 INFO L78 Accepts]: Start accepts. Automaton has 7848 states and 11119 transitions. Word has length 68 [2021-11-19 14:29:31,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:31,656 INFO L470 AbstractCegarLoop]: Abstraction has 7848 states and 11119 transitions. [2021-11-19 14:29:31,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:31,656 INFO L276 IsEmpty]: Start isEmpty. Operand 7848 states and 11119 transitions. [2021-11-19 14:29:31,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 14:29:31,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:31,658 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:31,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-19 14:29:31,659 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:31,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:31,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1583220552, now seen corresponding path program 1 times [2021-11-19 14:29:31,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:31,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063309236] [2021-11-19 14:29:31,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:31,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:31,707 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:31,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063309236] [2021-11-19 14:29:31,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063309236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:31,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:31,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:29:31,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167723641] [2021-11-19 14:29:31,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:31,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:29:31,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:31,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:29:31,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:29:31,709 INFO L87 Difference]: Start difference. First operand 7848 states and 11119 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:33,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:33,274 INFO L93 Difference]: Finished difference Result 18625 states and 26514 transitions. [2021-11-19 14:29:33,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:29:33,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-19 14:29:33,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:33,290 INFO L225 Difference]: With dead ends: 18625 [2021-11-19 14:29:33,290 INFO L226 Difference]: Without dead ends: 11573 [2021-11-19 14:29:33,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:29:33,299 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 57 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:33,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 254 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:29:33,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11573 states. [2021-11-19 14:29:34,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11573 to 10537. [2021-11-19 14:29:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10537 states, 10536 states have (on average 1.4074601366742596) internal successors, (14829), 10536 states have internal predecessors, (14829), 0 states have call successors, (0), 0 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 14:29:34,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10537 states to 10537 states and 14829 transitions. [2021-11-19 14:29:34,795 INFO L78 Accepts]: Start accepts. Automaton has 10537 states and 14829 transitions. Word has length 71 [2021-11-19 14:29:34,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:34,795 INFO L470 AbstractCegarLoop]: Abstraction has 10537 states and 14829 transitions. [2021-11-19 14:29:34,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:34,795 INFO L276 IsEmpty]: Start isEmpty. Operand 10537 states and 14829 transitions. [2021-11-19 14:29:34,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 14:29:34,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:34,799 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:34,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-19 14:29:34,799 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:34,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:34,800 INFO L85 PathProgramCache]: Analyzing trace with hash -973034147, now seen corresponding path program 1 times [2021-11-19 14:29:34,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:34,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649121333] [2021-11-19 14:29:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:34,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:29:34,909 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:34,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649121333] [2021-11-19 14:29:34,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649121333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:34,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:34,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:29:34,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887048123] [2021-11-19 14:29:34,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:34,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:29:34,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:34,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:29:34,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:29:34,912 INFO L87 Difference]: Start difference. First operand 10537 states and 14829 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 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 14:29:39,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:39,955 INFO L93 Difference]: Finished difference Result 41144 states and 57489 transitions. [2021-11-19 14:29:39,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:29:39,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 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 85 [2021-11-19 14:29:39,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:40,010 INFO L225 Difference]: With dead ends: 41144 [2021-11-19 14:29:40,010 INFO L226 Difference]: Without dead ends: 31379 [2021-11-19 14:29:40,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:29:40,026 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 959 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:40,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [959 Valid, 319 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:29:40,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31379 states. [2021-11-19 14:29:43,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31379 to 19831. [2021-11-19 14:29:43,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19831 states, 19830 states have (on average 1.384064548663641) internal successors, (27446), 19830 states have internal predecessors, (27446), 0 states have call successors, (0), 0 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 14:29:43,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19831 states to 19831 states and 27446 transitions. [2021-11-19 14:29:43,184 INFO L78 Accepts]: Start accepts. Automaton has 19831 states and 27446 transitions. Word has length 85 [2021-11-19 14:29:43,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:43,185 INFO L470 AbstractCegarLoop]: Abstraction has 19831 states and 27446 transitions. [2021-11-19 14:29:43,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 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 14:29:43,185 INFO L276 IsEmpty]: Start isEmpty. Operand 19831 states and 27446 transitions. [2021-11-19 14:29:43,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 14:29:43,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:43,197 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:43,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-19 14:29:43,198 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:43,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:43,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1938486078, now seen corresponding path program 1 times [2021-11-19 14:29:43,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:43,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828872585] [2021-11-19 14:29:43,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:43,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:44,149 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:44,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828872585] [2021-11-19 14:29:44,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828872585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:29:44,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008245688] [2021-11-19 14:29:44,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:44,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:29:44,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:29:44,152 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:29:44,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:29:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:44,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 14:29:44,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:29:46,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:29:49,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008245688] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:49,510 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:29:49,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14, 11] imperfect sequences [21] total 44 [2021-11-19 14:29:49,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838680356] [2021-11-19 14:29:49,511 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:49,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 14:29:49,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:49,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 14:29:49,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1662, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 14:29:49,514 INFO L87 Difference]: Start difference. First operand 19831 states and 27446 transitions. Second operand has 25 states, 25 states have (on average 6.0) internal successors, (150), 24 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 14:30:07,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:07,742 INFO L93 Difference]: Finished difference Result 80175 states and 111608 transitions. [2021-11-19 14:30:07,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 14:30:07,743 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.0) internal successors, (150), 24 states have internal predecessors, (150), 0 states have call successors, (0), 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 14:30:07,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:07,846 INFO L225 Difference]: With dead ends: 80175 [2021-11-19 14:30:07,846 INFO L226 Difference]: Without dead ends: 62895 [2021-11-19 14:30:07,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=617, Invalid=3805, Unknown=0, NotChecked=0, Total=4422 [2021-11-19 14:30:07,873 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 1913 mSDsluCounter, 2410 mSDsCounter, 0 mSdLazyCounter, 2805 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1913 SdHoareTripleChecker+Valid, 2525 SdHoareTripleChecker+Invalid, 2868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:07,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1913 Valid, 2525 Invalid, 2868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2805 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-19 14:30:07,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62895 states. [2021-11-19 14:30:14,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62895 to 27998. [2021-11-19 14:30:14,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27998 states, 27997 states have (on average 1.3820766510697575) internal successors, (38694), 27997 states have internal predecessors, (38694), 0 states have call successors, (0), 0 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 14:30:14,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27998 states to 27998 states and 38694 transitions. [2021-11-19 14:30:14,537 INFO L78 Accepts]: Start accepts. Automaton has 27998 states and 38694 transitions. Word has length 85 [2021-11-19 14:30:14,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:14,538 INFO L470 AbstractCegarLoop]: Abstraction has 27998 states and 38694 transitions. [2021-11-19 14:30:14,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.0) internal successors, (150), 24 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 14:30:14,538 INFO L276 IsEmpty]: Start isEmpty. Operand 27998 states and 38694 transitions. [2021-11-19 14:30:14,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 14:30:14,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:14,546 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:14,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:14,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:30:14,762 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:14,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:14,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1561531491, now seen corresponding path program 1 times [2021-11-19 14:30:14,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:30:14,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190793604] [2021-11-19 14:30:14,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:14,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:30:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:30:14,900 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:30:14,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190793604] [2021-11-19 14:30:14,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190793604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:14,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:14,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:30:14,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794120637] [2021-11-19 14:30:14,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:14,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:30:14,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:30:14,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:30:14,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:30:14,903 INFO L87 Difference]: Start difference. First operand 27998 states and 38694 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 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 14:30:27,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:27,567 INFO L93 Difference]: Finished difference Result 82825 states and 114465 transitions. [2021-11-19 14:30:27,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:30:27,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 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 85 [2021-11-19 14:30:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:27,667 INFO L225 Difference]: With dead ends: 82825 [2021-11-19 14:30:27,667 INFO L226 Difference]: Without dead ends: 55524 [2021-11-19 14:30:27,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:30:27,698 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 885 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:27,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 204 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:30:27,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55524 states. [2021-11-19 14:30:39,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55524 to 45535. [2021-11-19 14:30:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45535 states, 45534 states have (on average 1.3637062414898757) internal successors, (62095), 45534 states have internal predecessors, (62095), 0 states have call successors, (0), 0 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 14:30:39,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45535 states to 45535 states and 62095 transitions. [2021-11-19 14:30:39,401 INFO L78 Accepts]: Start accepts. Automaton has 45535 states and 62095 transitions. Word has length 85 [2021-11-19 14:30:39,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:39,401 INFO L470 AbstractCegarLoop]: Abstraction has 45535 states and 62095 transitions. [2021-11-19 14:30:39,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 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 14:30:39,402 INFO L276 IsEmpty]: Start isEmpty. Operand 45535 states and 62095 transitions. [2021-11-19 14:30:39,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 14:30:39,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:39,413 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:39,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-19 14:30:39,414 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:39,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:39,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1604932930, now seen corresponding path program 1 times [2021-11-19 14:30:39,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:30:39,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827955093] [2021-11-19 14:30:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:39,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:30:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:40,651 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:30:40,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827955093] [2021-11-19 14:30:40,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827955093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:40,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824308716] [2021-11-19 14:30:40,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:40,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:30:40,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:30:40,653 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:30:40,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00edbb9a-db98-4462-873a-a6cbfe79ba78/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 14:30:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:40,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-19 14:30:40,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:44,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:27,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824308716] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:27,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1009084706] [2021-11-19 14:31:27,928 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2021-11-19 14:31:27,928 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:31:27,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 14:31:27,940 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 14:31:27,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs