./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-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_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/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_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/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_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/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 37e549e4fa4b7b530556a3e37b4e2d4806fbb92dab5da0115a6c327b48fa0370 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:47:56,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:47:56,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:47:56,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:47:56,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:47:56,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:47:56,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:47:56,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:47:56,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:47:56,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:47:56,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:47:56,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:47:56,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:47:56,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:47:56,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:47:56,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:47:56,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:47:56,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:47:56,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:47:56,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:47:56,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:47:56,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:47:56,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:47:56,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:47:56,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:47:56,955 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:47:56,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:47:56,957 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:47:56,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:47:56,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:47:56,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:47:56,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:47:56,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:47:56,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:47:56,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:47:56,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:47:56,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:47:56,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:47:56,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:47:56,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:47:56,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:47:56,968 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:47:56,993 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:47:56,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:47:56,994 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:47:56,995 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:47:56,995 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:47:56,995 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:47:56,996 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:47:56,996 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:47:56,997 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:47:56,997 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:47:56,997 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:47:56,998 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:47:56,998 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:47:56,999 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:47:56,999 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:47:56,999 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:47:57,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:47:57,001 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:47:57,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:47:57,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:47:57,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:47:57,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:47:57,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:47:57,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:47:57,003 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:47:57,004 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:47:57,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:47:57,004 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:47:57,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:47:57,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:47:57,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:47:57,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:47:57,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:47:57,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:47:57,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:47:57,007 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:47:57,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:47:57,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:47:57,008 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:47:57,008 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:47:57,009 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_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37e549e4fa4b7b530556a3e37b4e2d4806fbb92dab5da0115a6c327b48fa0370 [2021-11-19 14:47:57,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:47:57,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:47:57,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:47:57,257 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:47:57,258 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:47:57,259 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-19 14:47:57,322 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/bin/utaipan-UbGMyvGFUs/data/1b82fe1fb/b58ace4adfea4b5cac81303089c9e32a/FLAG1963f1b94 [2021-11-19 14:47:57,845 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:47:57,846 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-19 14:47:57,863 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/bin/utaipan-UbGMyvGFUs/data/1b82fe1fb/b58ace4adfea4b5cac81303089c9e32a/FLAG1963f1b94 [2021-11-19 14:47:58,152 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/bin/utaipan-UbGMyvGFUs/data/1b82fe1fb/b58ace4adfea4b5cac81303089c9e32a [2021-11-19 14:47:58,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:47:58,156 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:47:58,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:47:58,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:47:58,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:47:58,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:47:58" (1/1) ... [2021-11-19 14:47:58,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f48e6aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:47:58, skipping insertion in model container [2021-11-19 14:47:58,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:47:58" (1/1) ... [2021-11-19 14:47:58,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:47:58,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:47:58,564 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_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13490,13503] [2021-11-19 14:47:58,629 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:47:58,644 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:47:58,812 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_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13490,13503] [2021-11-19 14:47:58,881 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:47:58,913 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:47:58,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:47:58 WrapperNode [2021-11-19 14:47:58,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:47:58,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:47:58,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:47:58,915 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:47:58,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:47:58" (1/1) ... [2021-11-19 14:47:58,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:47:58" (1/1) ... [2021-11-19 14:47:59,063 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1333 [2021-11-19 14:47:59,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:47:59,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:47:59,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:47:59,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:47:59,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:47:58" (1/1) ... [2021-11-19 14:47:59,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:47:58" (1/1) ... [2021-11-19 14:47:59,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:47:58" (1/1) ... [2021-11-19 14:47:59,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:47:58" (1/1) ... [2021-11-19 14:47:59,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:47:58" (1/1) ... [2021-11-19 14:47:59,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:47:58" (1/1) ... [2021-11-19 14:47:59,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:47:58" (1/1) ... [2021-11-19 14:47:59,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:47:59,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:47:59,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:47:59,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:47:59,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:47:58" (1/1) ... [2021-11-19 14:47:59,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:47:59,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:47:59,221 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:47:59,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:47:59,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:47:59,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:47:59,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:47:59,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:47:59,511 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:47:59,519 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:48:00,525 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:48:00,805 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:48:00,805 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 14:48:00,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:48:00 BoogieIcfgContainer [2021-11-19 14:48:00,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:48:00,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:48:00,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:48:00,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:48:00,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:47:58" (1/3) ... [2021-11-19 14:48:00,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1612f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:48:00, skipping insertion in model container [2021-11-19 14:48:00,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:47:58" (2/3) ... [2021-11-19 14:48:00,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1612f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:48:00, skipping insertion in model container [2021-11-19 14:48:00,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:48:00" (3/3) ... [2021-11-19 14:48:00,816 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-19 14:48:00,821 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:48:00,821 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:48:00,889 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:48:00,894 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 14:48:00,895 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:48:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 263 states, 261 states have (on average 1.6743295019157087) internal successors, (437), 262 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:00,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 14:48:00,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:00,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:48:00,938 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:00,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:00,944 INFO L85 PathProgramCache]: Analyzing trace with hash 165288551, now seen corresponding path program 1 times [2021-11-19 14:48:00,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:00,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156333680] [2021-11-19 14:48:00,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:00,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:01,441 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 14:48:01,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:01,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156333680] [2021-11-19 14:48:01,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156333680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:01,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:01,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:48:01,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677441988] [2021-11-19 14:48:01,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:01,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:48:01,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:01,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:48:01,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:48:01,493 INFO L87 Difference]: Start difference. First operand has 263 states, 261 states have (on average 1.6743295019157087) internal successors, (437), 262 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:01,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:01,752 INFO L93 Difference]: Finished difference Result 457 states and 752 transitions. [2021-11-19 14:48:01,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:48:01,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-11-19 14:48:01,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:01,781 INFO L225 Difference]: With dead ends: 457 [2021-11-19 14:48:01,781 INFO L226 Difference]: Without dead ends: 346 [2021-11-19 14:48:01,785 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 14:48:01,790 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 178 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:01,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 889 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:48:01,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-19 14:48:01,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 344. [2021-11-19 14:48:01,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.565597667638484) internal successors, (537), 343 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:01,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 537 transitions. [2021-11-19 14:48:01,900 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 537 transitions. Word has length 97 [2021-11-19 14:48:01,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:01,902 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 537 transitions. [2021-11-19 14:48:01,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:01,904 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 537 transitions. [2021-11-19 14:48:01,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 14:48:01,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:01,913 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:48:01,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:48:01,914 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:01,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:01,918 INFO L85 PathProgramCache]: Analyzing trace with hash -28018123, now seen corresponding path program 1 times [2021-11-19 14:48:01,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:01,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094311569] [2021-11-19 14:48:01,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:01,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:02,137 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 14:48:02,138 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:02,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094311569] [2021-11-19 14:48:02,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094311569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:02,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:02,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:48:02,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955132511] [2021-11-19 14:48:02,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:02,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:48:02,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:02,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:48:02,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:48:02,145 INFO L87 Difference]: Start difference. First operand 344 states and 537 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:02,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:02,335 INFO L93 Difference]: Finished difference Result 638 states and 1018 transitions. [2021-11-19 14:48:02,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:48:02,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-19 14:48:02,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:02,342 INFO L225 Difference]: With dead ends: 638 [2021-11-19 14:48:02,342 INFO L226 Difference]: Without dead ends: 450 [2021-11-19 14:48:02,350 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 14:48:02,353 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 163 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:02,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 703 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:48:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-19 14:48:02,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2021-11-19 14:48:02,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.574944071588367) internal successors, (704), 447 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:02,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 704 transitions. [2021-11-19 14:48:02,384 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 704 transitions. Word has length 99 [2021-11-19 14:48:02,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:02,385 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 704 transitions. [2021-11-19 14:48:02,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:02,386 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 704 transitions. [2021-11-19 14:48:02,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 14:48:02,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:02,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:48:02,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 14:48:02,389 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:02,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:02,390 INFO L85 PathProgramCache]: Analyzing trace with hash -564607885, now seen corresponding path program 1 times [2021-11-19 14:48:02,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:02,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566123205] [2021-11-19 14:48:02,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:02,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:02,477 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 14:48:02,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:02,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566123205] [2021-11-19 14:48:02,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566123205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:02,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:02,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:48:02,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090390700] [2021-11-19 14:48:02,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:02,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:48:02,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:02,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:48:02,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:48:02,481 INFO L87 Difference]: Start difference. First operand 448 states and 704 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:02,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:02,614 INFO L93 Difference]: Finished difference Result 968 states and 1553 transitions. [2021-11-19 14:48:02,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:48:02,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2021-11-19 14:48:02,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:02,619 INFO L225 Difference]: With dead ends: 968 [2021-11-19 14:48:02,619 INFO L226 Difference]: Without dead ends: 678 [2021-11-19 14:48:02,621 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 14:48:02,622 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 162 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:02,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 789 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:48:02,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-11-19 14:48:02,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 676. [2021-11-19 14:48:02,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 1.5925925925925926) internal successors, (1075), 675 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:02,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1075 transitions. [2021-11-19 14:48:02,657 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1075 transitions. Word has length 102 [2021-11-19 14:48:02,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:02,657 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 1075 transitions. [2021-11-19 14:48:02,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:02,658 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1075 transitions. [2021-11-19 14:48:02,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 14:48:02,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:02,660 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:48:02,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 14:48:02,660 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:02,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:02,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1775454356, now seen corresponding path program 1 times [2021-11-19 14:48:02,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:02,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568527478] [2021-11-19 14:48:02,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:02,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:02,738 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 14:48:02,738 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:02,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568527478] [2021-11-19 14:48:02,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568527478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:02,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:02,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:48:02,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438943443] [2021-11-19 14:48:02,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:02,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:48:02,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:02,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:48:02,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:48:02,741 INFO L87 Difference]: Start difference. First operand 676 states and 1075 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:02,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:02,914 INFO L93 Difference]: Finished difference Result 1506 states and 2428 transitions. [2021-11-19 14:48:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:48:02,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-19 14:48:02,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:02,921 INFO L225 Difference]: With dead ends: 1506 [2021-11-19 14:48:02,922 INFO L226 Difference]: Without dead ends: 988 [2021-11-19 14:48:02,923 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 14:48:02,924 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 161 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:02,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 719 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:48:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2021-11-19 14:48:02,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 986. [2021-11-19 14:48:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 1.603045685279188) internal successors, (1579), 985 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:02,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1579 transitions. [2021-11-19 14:48:02,975 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1579 transitions. Word has length 104 [2021-11-19 14:48:02,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:02,976 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 1579 transitions. [2021-11-19 14:48:02,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:02,976 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1579 transitions. [2021-11-19 14:48:02,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 14:48:02,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:02,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:48:02,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 14:48:02,979 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:02,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:02,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2001259105, now seen corresponding path program 1 times [2021-11-19 14:48:02,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:02,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319945440] [2021-11-19 14:48:02,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:02,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:03,056 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 14:48:03,056 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:03,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319945440] [2021-11-19 14:48:03,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319945440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:03,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:03,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:48:03,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977004574] [2021-11-19 14:48:03,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:03,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:48:03,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:03,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:48:03,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:48:03,059 INFO L87 Difference]: Start difference. First operand 986 states and 1579 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:03,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:03,235 INFO L93 Difference]: Finished difference Result 2418 states and 3912 transitions. [2021-11-19 14:48:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:48:03,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 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 107 [2021-11-19 14:48:03,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:03,246 INFO L225 Difference]: With dead ends: 2418 [2021-11-19 14:48:03,246 INFO L226 Difference]: Without dead ends: 1612 [2021-11-19 14:48:03,248 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 14:48:03,249 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 155 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:03,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 755 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:48:03,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-11-19 14:48:03,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1610. [2021-11-19 14:48:03,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 1.6078309509011808) internal successors, (2587), 1609 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:03,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2587 transitions. [2021-11-19 14:48:03,371 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2587 transitions. Word has length 107 [2021-11-19 14:48:03,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:03,371 INFO L470 AbstractCegarLoop]: Abstraction has 1610 states and 2587 transitions. [2021-11-19 14:48:03,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:03,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2587 transitions. [2021-11-19 14:48:03,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-19 14:48:03,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:03,380 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:48:03,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 14:48:03,380 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:03,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:03,382 INFO L85 PathProgramCache]: Analyzing trace with hash 133563105, now seen corresponding path program 1 times [2021-11-19 14:48:03,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:03,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211049928] [2021-11-19 14:48:03,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:03,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:48:03,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:03,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211049928] [2021-11-19 14:48:03,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211049928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:03,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:03,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:48:03,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270221052] [2021-11-19 14:48:03,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:03,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:48:03,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:03,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:48:03,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:48:03,488 INFO L87 Difference]: Start difference. First operand 1610 states and 2587 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:03,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:03,743 INFO L93 Difference]: Finished difference Result 3868 states and 6259 transitions. [2021-11-19 14:48:03,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:48:03,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-11-19 14:48:03,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:03,762 INFO L225 Difference]: With dead ends: 3868 [2021-11-19 14:48:03,763 INFO L226 Difference]: Without dead ends: 2438 [2021-11-19 14:48:03,766 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 14:48:03,768 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 154 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:03,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 721 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:48:03,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-11-19 14:48:03,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2436. [2021-11-19 14:48:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 2435 states have (on average 1.6123203285420944) internal successors, (3926), 2435 states have internal predecessors, (3926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 3926 transitions. [2021-11-19 14:48:03,984 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 3926 transitions. Word has length 109 [2021-11-19 14:48:03,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:03,985 INFO L470 AbstractCegarLoop]: Abstraction has 2436 states and 3926 transitions. [2021-11-19 14:48:03,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:03,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 3926 transitions. [2021-11-19 14:48:03,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 14:48:03,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:03,988 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:48:03,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 14:48:03,988 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:03,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:03,989 INFO L85 PathProgramCache]: Analyzing trace with hash -920248955, now seen corresponding path program 1 times [2021-11-19 14:48:03,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:03,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477020507] [2021-11-19 14:48:03,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:03,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:04,079 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 14:48:04,079 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:04,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477020507] [2021-11-19 14:48:04,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477020507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:04,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:04,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:48:04,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3509432] [2021-11-19 14:48:04,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:04,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:48:04,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:04,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:48:04,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:48:04,084 INFO L87 Difference]: Start difference. First operand 2436 states and 3926 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:04,486 INFO L93 Difference]: Finished difference Result 6364 states and 10291 transitions. [2021-11-19 14:48:04,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:48:04,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 112 [2021-11-19 14:48:04,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:04,518 INFO L225 Difference]: With dead ends: 6364 [2021-11-19 14:48:04,519 INFO L226 Difference]: Without dead ends: 4130 [2021-11-19 14:48:04,527 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 14:48:04,532 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 148 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:04,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 721 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:48:04,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4130 states. [2021-11-19 14:48:04,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4130 to 4128. [2021-11-19 14:48:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 4127 states have (on average 1.607705354979404) internal successors, (6635), 4127 states have internal predecessors, (6635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:04,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 6635 transitions. [2021-11-19 14:48:04,897 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 6635 transitions. Word has length 112 [2021-11-19 14:48:04,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:04,898 INFO L470 AbstractCegarLoop]: Abstraction has 4128 states and 6635 transitions. [2021-11-19 14:48:04,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:04,898 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 6635 transitions. [2021-11-19 14:48:04,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 14:48:04,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:04,901 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:48:04,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 14:48:04,901 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:04,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:04,903 INFO L85 PathProgramCache]: Analyzing trace with hash -490132379, now seen corresponding path program 1 times [2021-11-19 14:48:04,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:04,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759026667] [2021-11-19 14:48:04,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:04,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:48:05,012 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:05,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759026667] [2021-11-19 14:48:05,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759026667] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:05,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:05,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:48:05,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337122713] [2021-11-19 14:48:05,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:05,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:48:05,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:05,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:48:05,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:48:05,017 INFO L87 Difference]: Start difference. First operand 4128 states and 6635 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:05,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:05,594 INFO L93 Difference]: Finished difference Result 10310 states and 16634 transitions. [2021-11-19 14:48:05,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:48:05,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-19 14:48:05,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:05,634 INFO L225 Difference]: With dead ends: 10310 [2021-11-19 14:48:05,635 INFO L226 Difference]: Without dead ends: 6384 [2021-11-19 14:48:05,645 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 14:48:05,646 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 147 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:05,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 723 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:48:05,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2021-11-19 14:48:06,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 6382. [2021-11-19 14:48:06,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6382 states, 6381 states have (on average 1.6093088857545839) internal successors, (10269), 6381 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:06,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6382 states to 6382 states and 10269 transitions. [2021-11-19 14:48:06,165 INFO L78 Accepts]: Start accepts. Automaton has 6382 states and 10269 transitions. Word has length 114 [2021-11-19 14:48:06,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:06,167 INFO L470 AbstractCegarLoop]: Abstraction has 6382 states and 10269 transitions. [2021-11-19 14:48:06,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:06,168 INFO L276 IsEmpty]: Start isEmpty. Operand 6382 states and 10269 transitions. [2021-11-19 14:48:06,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 14:48:06,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:06,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:48:06,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 14:48:06,170 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:06,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:06,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1305645416, now seen corresponding path program 1 times [2021-11-19 14:48:06,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:06,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601039431] [2021-11-19 14:48:06,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:06,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:06,346 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 14:48:06,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:06,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601039431] [2021-11-19 14:48:06,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601039431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:06,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:06,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:48:06,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071540522] [2021-11-19 14:48:06,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:06,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:48:06,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:06,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:48:06,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:48:06,350 INFO L87 Difference]: Start difference. First operand 6382 states and 10269 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:07,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:07,665 INFO L93 Difference]: Finished difference Result 16006 states and 25762 transitions. [2021-11-19 14:48:07,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:48:07,665 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-11-19 14:48:07,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:07,751 INFO L225 Difference]: With dead ends: 16006 [2021-11-19 14:48:07,751 INFO L226 Difference]: Without dead ends: 9848 [2021-11-19 14:48:07,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:48:07,767 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 1268 mSDsluCounter, 3263 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 3525 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:07,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1268 Valid, 3525 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:48:07,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-11-19 14:48:08,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9834. [2021-11-19 14:48:08,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9833 states have (on average 1.6015458151123767) internal successors, (15748), 9833 states have internal predecessors, (15748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:08,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 15748 transitions. [2021-11-19 14:48:08,628 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 15748 transitions. Word has length 117 [2021-11-19 14:48:08,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:08,629 INFO L470 AbstractCegarLoop]: Abstraction has 9834 states and 15748 transitions. [2021-11-19 14:48:08,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:08,630 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 15748 transitions. [2021-11-19 14:48:08,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 14:48:08,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:08,633 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:48:08,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 14:48:08,634 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:08,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:08,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1887364262, now seen corresponding path program 1 times [2021-11-19 14:48:08,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:08,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907471498] [2021-11-19 14:48:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:08,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:08,731 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 14:48:08,731 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:08,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907471498] [2021-11-19 14:48:08,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907471498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:08,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:08,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:48:08,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457964735] [2021-11-19 14:48:08,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:08,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:48:08,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:08,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:48:08,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:48:08,735 INFO L87 Difference]: Start difference. First operand 9834 states and 15748 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:09,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:09,719 INFO L93 Difference]: Finished difference Result 19446 states and 31165 transitions. [2021-11-19 14:48:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:48:09,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2021-11-19 14:48:09,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:09,759 INFO L225 Difference]: With dead ends: 19446 [2021-11-19 14:48:09,760 INFO L226 Difference]: Without dead ends: 9836 [2021-11-19 14:48:09,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:48:09,778 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 311 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:09,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 1058 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:48:09,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2021-11-19 14:48:10,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 9834. [2021-11-19 14:48:10,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9833 states have (on average 1.5980880707820604) internal successors, (15714), 9833 states have internal predecessors, (15714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:10,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 15714 transitions. [2021-11-19 14:48:10,507 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 15714 transitions. Word has length 118 [2021-11-19 14:48:10,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:10,508 INFO L470 AbstractCegarLoop]: Abstraction has 9834 states and 15714 transitions. [2021-11-19 14:48:10,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:10,508 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 15714 transitions. [2021-11-19 14:48:10,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 14:48:10,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:10,510 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:48:10,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 14:48:10,511 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:10,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:10,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1558746015, now seen corresponding path program 1 times [2021-11-19 14:48:10,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:10,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487607015] [2021-11-19 14:48:10,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:10,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:10,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:48:10,600 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:10,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487607015] [2021-11-19 14:48:10,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487607015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:10,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:10,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:48:10,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713661752] [2021-11-19 14:48:10,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:10,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:48:10,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:10,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:48:10,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:48:10,604 INFO L87 Difference]: Start difference. First operand 9834 states and 15714 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:11,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:11,410 INFO L93 Difference]: Finished difference Result 19446 states and 31097 transitions. [2021-11-19 14:48:11,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:48:11,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-11-19 14:48:11,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:11,441 INFO L225 Difference]: With dead ends: 19446 [2021-11-19 14:48:11,442 INFO L226 Difference]: Without dead ends: 9836 [2021-11-19 14:48:11,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:48:11,458 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 319 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:11,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 1064 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:48:11,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2021-11-19 14:48:12,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 9834. [2021-11-19 14:48:12,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9833 states have (on average 1.594630326451744) internal successors, (15680), 9833 states have internal predecessors, (15680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:12,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 15680 transitions. [2021-11-19 14:48:12,358 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 15680 transitions. Word has length 119 [2021-11-19 14:48:12,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:12,359 INFO L470 AbstractCegarLoop]: Abstraction has 9834 states and 15680 transitions. [2021-11-19 14:48:12,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:12,359 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 15680 transitions. [2021-11-19 14:48:12,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:48:12,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:12,362 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:48:12,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 14:48:12,363 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:12,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:12,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1018540225, now seen corresponding path program 1 times [2021-11-19 14:48:12,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:12,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937005367] [2021-11-19 14:48:12,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:12,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:48:12,487 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:12,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937005367] [2021-11-19 14:48:12,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937005367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:12,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:12,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:48:12,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375103956] [2021-11-19 14:48:12,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:12,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:48:12,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:12,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:48:12,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:48:12,491 INFO L87 Difference]: Start difference. First operand 9834 states and 15680 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:13,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:13,362 INFO L93 Difference]: Finished difference Result 19446 states and 31029 transitions. [2021-11-19 14:48:13,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:48:13,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-11-19 14:48:13,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:13,394 INFO L225 Difference]: With dead ends: 19446 [2021-11-19 14:48:13,394 INFO L226 Difference]: Without dead ends: 9836 [2021-11-19 14:48:13,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:48:13,412 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 317 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:13,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 1067 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:48:13,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2021-11-19 14:48:14,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 9834. [2021-11-19 14:48:14,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9833 states have (on average 1.5911725821214278) internal successors, (15646), 9833 states have internal predecessors, (15646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:14,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 15646 transitions. [2021-11-19 14:48:14,217 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 15646 transitions. Word has length 120 [2021-11-19 14:48:14,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:14,218 INFO L470 AbstractCegarLoop]: Abstraction has 9834 states and 15646 transitions. [2021-11-19 14:48:14,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:14,219 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 15646 transitions. [2021-11-19 14:48:14,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 14:48:14,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:14,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:48:14,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 14:48:14,222 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:14,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:14,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1456587942, now seen corresponding path program 1 times [2021-11-19 14:48:14,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:14,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525966889] [2021-11-19 14:48:14,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:14,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:14,316 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 14:48:14,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:14,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525966889] [2021-11-19 14:48:14,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525966889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:14,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:14,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:48:14,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755308273] [2021-11-19 14:48:14,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:14,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:48:14,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:14,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:48:14,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:48:14,319 INFO L87 Difference]: Start difference. First operand 9834 states and 15646 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:15,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:15,028 INFO L93 Difference]: Finished difference Result 19446 states and 30961 transitions. [2021-11-19 14:48:15,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:48:15,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-11-19 14:48:15,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:15,064 INFO L225 Difference]: With dead ends: 19446 [2021-11-19 14:48:15,064 INFO L226 Difference]: Without dead ends: 9836 [2021-11-19 14:48:15,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:48:15,086 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 315 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:15,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1070 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:48:15,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2021-11-19 14:48:15,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 9834. [2021-11-19 14:48:15,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9833 states have (on average 1.5877148377911117) internal successors, (15612), 9833 states have internal predecessors, (15612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:15,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 15612 transitions. [2021-11-19 14:48:15,724 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 15612 transitions. Word has length 121 [2021-11-19 14:48:15,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:15,725 INFO L470 AbstractCegarLoop]: Abstraction has 9834 states and 15612 transitions. [2021-11-19 14:48:15,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:15,725 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 15612 transitions. [2021-11-19 14:48:15,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 14:48:15,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:15,728 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:48:15,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 14:48:15,728 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:15,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:15,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1895631721, now seen corresponding path program 1 times [2021-11-19 14:48:15,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:15,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390497842] [2021-11-19 14:48:15,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:15,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:15,924 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 14:48:15,925 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:15,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390497842] [2021-11-19 14:48:15,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390497842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:15,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:15,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:48:15,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890477622] [2021-11-19 14:48:15,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:15,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:48:15,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:15,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:48:15,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:48:15,927 INFO L87 Difference]: Start difference. First operand 9834 states and 15612 transitions. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:17,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:17,046 INFO L93 Difference]: Finished difference Result 19446 states and 30893 transitions. [2021-11-19 14:48:17,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:48:17,047 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-11-19 14:48:17,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:17,078 INFO L225 Difference]: With dead ends: 19446 [2021-11-19 14:48:17,079 INFO L226 Difference]: Without dead ends: 9836 [2021-11-19 14:48:17,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:48:17,097 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 410 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:17,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 1385 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:48:17,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2021-11-19 14:48:17,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 9834. [2021-11-19 14:48:17,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9833 states have (on average 1.5860876639886097) internal successors, (15596), 9833 states have internal predecessors, (15596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:17,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 15596 transitions. [2021-11-19 14:48:17,889 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 15596 transitions. Word has length 123 [2021-11-19 14:48:17,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:17,889 INFO L470 AbstractCegarLoop]: Abstraction has 9834 states and 15596 transitions. [2021-11-19 14:48:17,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:17,890 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 15596 transitions. [2021-11-19 14:48:17,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 14:48:17,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:17,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:48:17,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 14:48:17,892 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:17,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:17,893 INFO L85 PathProgramCache]: Analyzing trace with hash -287993709, now seen corresponding path program 1 times [2021-11-19 14:48:17,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:17,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025990140] [2021-11-19 14:48:17,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:17,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:18,061 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 14:48:18,061 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:18,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025990140] [2021-11-19 14:48:18,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025990140] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:18,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:18,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:48:18,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51310130] [2021-11-19 14:48:18,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:18,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:48:18,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:18,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:48:18,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:48:18,064 INFO L87 Difference]: Start difference. First operand 9834 states and 15596 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:19,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:19,192 INFO L93 Difference]: Finished difference Result 24515 states and 38805 transitions. [2021-11-19 14:48:19,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:48:19,192 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-11-19 14:48:19,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:19,237 INFO L225 Difference]: With dead ends: 24515 [2021-11-19 14:48:19,237 INFO L226 Difference]: Without dead ends: 14905 [2021-11-19 14:48:19,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:48:19,254 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 405 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:19,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 1414 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:48:19,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14905 states. [2021-11-19 14:48:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14905 to 14903. [2021-11-19 14:48:19,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14903 states, 14902 states have (on average 1.5780432156757482) internal successors, (23516), 14902 states have internal predecessors, (23516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:20,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14903 states to 14903 states and 23516 transitions. [2021-11-19 14:48:20,023 INFO L78 Accepts]: Start accepts. Automaton has 14903 states and 23516 transitions. Word has length 126 [2021-11-19 14:48:20,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:20,024 INFO L470 AbstractCegarLoop]: Abstraction has 14903 states and 23516 transitions. [2021-11-19 14:48:20,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:20,024 INFO L276 IsEmpty]: Start isEmpty. Operand 14903 states and 23516 transitions. [2021-11-19 14:48:20,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 14:48:20,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:20,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:48:20,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 14:48:20,027 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:20,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:20,027 INFO L85 PathProgramCache]: Analyzing trace with hash -302749287, now seen corresponding path program 1 times [2021-11-19 14:48:20,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:20,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269419633] [2021-11-19 14:48:20,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:20,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:20,202 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 14:48:20,202 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:20,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269419633] [2021-11-19 14:48:20,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269419633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:20,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:20,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:48:20,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405998942] [2021-11-19 14:48:20,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:20,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:48:20,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:20,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:48:20,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:48:20,204 INFO L87 Difference]: Start difference. First operand 14903 states and 23516 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:21,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:21,326 INFO L93 Difference]: Finished difference Result 18211 states and 28624 transitions. [2021-11-19 14:48:21,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:48:21,331 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-11-19 14:48:21,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:21,371 INFO L225 Difference]: With dead ends: 18211 [2021-11-19 14:48:21,371 INFO L226 Difference]: Without dead ends: 18209 [2021-11-19 14:48:21,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:48:21,377 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 449 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 2051 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:21,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 2051 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:48:21,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18209 states. [2021-11-19 14:48:22,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18209 to 14917. [2021-11-19 14:48:22,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14917 states, 14916 states have (on average 1.5761598283722178) internal successors, (23510), 14916 states have internal predecessors, (23510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:22,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14917 states to 14917 states and 23510 transitions. [2021-11-19 14:48:22,162 INFO L78 Accepts]: Start accepts. Automaton has 14917 states and 23510 transitions. Word has length 127 [2021-11-19 14:48:22,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:22,163 INFO L470 AbstractCegarLoop]: Abstraction has 14917 states and 23510 transitions. [2021-11-19 14:48:22,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:22,163 INFO L276 IsEmpty]: Start isEmpty. Operand 14917 states and 23510 transitions. [2021-11-19 14:48:22,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:48:22,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:22,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:48:22,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 14:48:22,166 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:22,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:22,167 INFO L85 PathProgramCache]: Analyzing trace with hash -287172476, now seen corresponding path program 1 times [2021-11-19 14:48:22,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:22,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357557894] [2021-11-19 14:48:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:22,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:48:22,812 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:22,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357557894] [2021-11-19 14:48:22,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357557894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:48:22,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088090547] [2021-11-19 14:48:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:22,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:48:22,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:48:22,820 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:48:22,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:48:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:23,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:48:23,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:48:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:48:23,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:48:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:48:23,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088090547] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:23,981 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:48:23,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [13] total 16 [2021-11-19 14:48:23,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23889516] [2021-11-19 14:48:23,982 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:23,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:48:23,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:23,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:48:23,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:48:23,984 INFO L87 Difference]: Start difference. First operand 14917 states and 23510 transitions. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:25,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:25,568 INFO L93 Difference]: Finished difference Result 43920 states and 69225 transitions. [2021-11-19 14:48:25,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:48:25,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 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 139 [2021-11-19 14:48:25,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:25,625 INFO L225 Difference]: With dead ends: 43920 [2021-11-19 14:48:25,626 INFO L226 Difference]: Without dead ends: 29224 [2021-11-19 14:48:25,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:48:25,654 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 1646 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1646 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:25,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1646 Valid, 724 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:48:25,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29224 states. [2021-11-19 14:48:27,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29224 to 29222. [2021-11-19 14:48:27,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29222 states, 29221 states have (on average 1.5718147907326923) internal successors, (45930), 29221 states have internal predecessors, (45930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29222 states to 29222 states and 45930 transitions. [2021-11-19 14:48:27,807 INFO L78 Accepts]: Start accepts. Automaton has 29222 states and 45930 transitions. Word has length 139 [2021-11-19 14:48:27,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:27,807 INFO L470 AbstractCegarLoop]: Abstraction has 29222 states and 45930 transitions. [2021-11-19 14:48:27,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:27,807 INFO L276 IsEmpty]: Start isEmpty. Operand 29222 states and 45930 transitions. [2021-11-19 14:48:27,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-19 14:48:27,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:27,811 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:48:27,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-19 14:48:28,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e55985-6cdf-4aa1-a3fb-5b9334c93f31/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-19 14:48:28,027 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:28,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:28,028 INFO L85 PathProgramCache]: Analyzing trace with hash -109535061, now seen corresponding path program 1 times [2021-11-19 14:48:28,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:28,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910171439] [2021-11-19 14:48:28,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:28,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:48:28,106 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:28,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910171439] [2021-11-19 14:48:28,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910171439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:28,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:28,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:48:28,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168890417] [2021-11-19 14:48:28,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:28,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:48:28,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:28,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:48:28,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:48:28,108 INFO L87 Difference]: Start difference. First operand 29222 states and 45930 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:30,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:30,707 INFO L93 Difference]: Finished difference Result 67784 states and 106804 transitions. [2021-11-19 14:48:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:48:30,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 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 140 [2021-11-19 14:48:30,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:30,782 INFO L225 Difference]: With dead ends: 67784 [2021-11-19 14:48:30,782 INFO L226 Difference]: Without dead ends: 38935 [2021-11-19 14:48:30,809 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 14:48:30,810 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 148 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:30,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 728 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:48:30,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38935 states. [2021-11-19 14:48:33,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38935 to 38933. [2021-11-19 14:48:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38933 states, 38932 states have (on average 1.5630843522038427) internal successors, (60854), 38932 states have internal predecessors, (60854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38933 states to 38933 states and 60854 transitions. [2021-11-19 14:48:33,431 INFO L78 Accepts]: Start accepts. Automaton has 38933 states and 60854 transitions. Word has length 140 [2021-11-19 14:48:33,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:33,431 INFO L470 AbstractCegarLoop]: Abstraction has 38933 states and 60854 transitions. [2021-11-19 14:48:33,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:33,431 INFO L276 IsEmpty]: Start isEmpty. Operand 38933 states and 60854 transitions. [2021-11-19 14:48:33,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-19 14:48:33,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:33,434 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:48:33,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 14:48:33,436 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:33,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:33,437 INFO L85 PathProgramCache]: Analyzing trace with hash -826202184, now seen corresponding path program 1 times [2021-11-19 14:48:33,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:33,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163909910] [2021-11-19 14:48:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:33,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:48:33,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:33,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163909910] [2021-11-19 14:48:33,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163909910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:33,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:33,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:48:33,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900333137] [2021-11-19 14:48:33,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:33,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:48:33,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:33,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:48:33,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:48:33,518 INFO L87 Difference]: Start difference. First operand 38933 states and 60854 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:38,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:38,883 INFO L93 Difference]: Finished difference Result 114171 states and 178356 transitions. [2021-11-19 14:48:38,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:48:38,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 141 [2021-11-19 14:48:38,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:39,063 INFO L225 Difference]: With dead ends: 114171 [2021-11-19 14:48:39,064 INFO L226 Difference]: Without dead ends: 75326 [2021-11-19 14:48:39,110 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 14:48:39,111 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 273 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:39,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 1035 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:48:39,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75326 states. [2021-11-19 14:48:44,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75326 to 75324. [2021-11-19 14:48:44,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75324 states, 75323 states have (on average 1.5551159672344437) internal successors, (117136), 75323 states have internal predecessors, (117136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75324 states to 75324 states and 117136 transitions. [2021-11-19 14:48:44,266 INFO L78 Accepts]: Start accepts. Automaton has 75324 states and 117136 transitions. Word has length 141 [2021-11-19 14:48:44,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:44,266 INFO L470 AbstractCegarLoop]: Abstraction has 75324 states and 117136 transitions. [2021-11-19 14:48:44,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:48:44,266 INFO L276 IsEmpty]: Start isEmpty. Operand 75324 states and 117136 transitions. [2021-11-19 14:48:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-19 14:48:44,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:44,270 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:48:44,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 14:48:44,270 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:44,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:44,271 INFO L85 PathProgramCache]: Analyzing trace with hash -352683241, now seen corresponding path program 1 times [2021-11-19 14:48:44,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:48:44,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984829592] [2021-11-19 14:48:44,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:44,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:48:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:48:44,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:48:44,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984829592] [2021-11-19 14:48:44,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984829592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:44,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:44,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:48:44,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398085632] [2021-11-19 14:48:44,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:44,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:48:44,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:48:44,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:48:44,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:48:44,312 INFO L87 Difference]: Start difference. First operand 75324 states and 117136 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)