./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8 --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 453217a894ab839ac749d51e6f81154421ad61236b47a16877fbef21d8ae30a8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:12:11,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:12:11,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:12:11,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:12:11,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:12:11,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:12:11,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:12:11,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:12:11,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:12:11,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:12:11,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:12:11,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:12:11,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:12:11,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:12:11,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:12:11,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:12:11,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:12:11,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:12:11,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:12:11,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:12:11,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:12:11,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:12:11,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:12:11,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:12:11,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:12:11,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:12:11,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:12:11,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:12:11,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:12:11,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:12:11,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:12:11,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:12:11,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:12:11,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:12:11,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:12:11,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:12:11,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:12:11,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:12:11,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:12:11,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:12:11,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:12:11,865 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:12:11,923 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:12:11,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:12:11,930 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:12:11,930 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:12:11,930 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:12:11,931 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:12:11,931 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:12:11,931 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:12:11,931 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:12:11,932 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:12:11,933 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:12:11,934 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:12:11,934 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:12:11,934 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:12:11,935 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:12:11,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:12:11,936 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:12:11,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:12:11,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:12:11,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:12:11,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:12:11,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:12:11,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:12:11,938 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:12:11,938 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:12:11,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:12:11,938 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:12:11,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:12:11,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:12:11,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:12:11,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:12:11,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:12:11,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:12:11,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:12:11,943 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:12:11,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:12:11,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:12:11,944 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:12:11,944 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:12:11,944 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_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 453217a894ab839ac749d51e6f81154421ad61236b47a16877fbef21d8ae30a8 [2021-11-07 01:12:12,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:12:12,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:12:12,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:12:12,316 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:12:12,316 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:12:12,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-07 01:12:12,388 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/data/e9cc622e8/d1f5848d5c3e47d6a42e94fe798b42ca/FLAG47921281b [2021-11-07 01:12:12,963 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:12:12,964 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-07 01:12:12,978 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/data/e9cc622e8/d1f5848d5c3e47d6a42e94fe798b42ca/FLAG47921281b [2021-11-07 01:12:13,226 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/data/e9cc622e8/d1f5848d5c3e47d6a42e94fe798b42ca [2021-11-07 01:12:13,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:12:13,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:12:13,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:12:13,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:12:13,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:12:13,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:12:13" (1/1) ... [2021-11-07 01:12:13,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e121dfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:13, skipping insertion in model container [2021-11-07 01:12:13,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:12:13" (1/1) ... [2021-11-07 01:12:13,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:12:13,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:12:13,667 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2021-11-07 01:12:13,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:12:13,789 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:12:13,912 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2021-11-07 01:12:13,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:12:14,009 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:12:14,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:14 WrapperNode [2021-11-07 01:12:14,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:12:14,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:12:14,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:12:14,011 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:12:14,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:14" (1/1) ... [2021-11-07 01:12:14,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:14" (1/1) ... [2021-11-07 01:12:14,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:12:14,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:12:14,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:12:14,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:12:14,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:14" (1/1) ... [2021-11-07 01:12:14,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:14" (1/1) ... [2021-11-07 01:12:14,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:14" (1/1) ... [2021-11-07 01:12:14,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:14" (1/1) ... [2021-11-07 01:12:14,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:14" (1/1) ... [2021-11-07 01:12:14,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:14" (1/1) ... [2021-11-07 01:12:14,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:14" (1/1) ... [2021-11-07 01:12:14,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:12:14,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:12:14,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:12:14,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:12:14,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:14" (1/1) ... [2021-11-07 01:12:14,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:12:14,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:12:14,239 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:12:14,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:12:14,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:12:14,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:12:14,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:12:14,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:12:15,834 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:12:15,835 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:12:15,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:12:15 BoogieIcfgContainer [2021-11-07 01:12:15,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:12:15,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:12:15,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:12:15,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:12:15,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:12:13" (1/3) ... [2021-11-07 01:12:15,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b71943e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:12:15, skipping insertion in model container [2021-11-07 01:12:15,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:14" (2/3) ... [2021-11-07 01:12:15,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b71943e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:12:15, skipping insertion in model container [2021-11-07 01:12:15,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:12:15" (3/3) ... [2021-11-07 01:12:15,849 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-07 01:12:15,856 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:12:15,856 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:12:15,916 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:12:15,924 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 [2021-11-07 01:12:15,925 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:12:15,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 125 states, 123 states have (on average 1.7073170731707317) internal successors, (210), 124 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:15,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:12:15,956 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:15,956 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:15,957 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:15,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:15,964 INFO L85 PathProgramCache]: Analyzing trace with hash -2116336815, now seen corresponding path program 1 times [2021-11-07 01:12:15,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:15,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025374108] [2021-11-07 01:12:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:15,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:16,632 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:16,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025374108] [2021-11-07 01:12:16,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025374108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:16,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:16,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:12:16,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715405454] [2021-11-07 01:12:16,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:12:16,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:16,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:12:16,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:12:16,683 INFO L87 Difference]: Start difference. First operand has 125 states, 123 states have (on average 1.7073170731707317) internal successors, (210), 124 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:17,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:17,065 INFO L93 Difference]: Finished difference Result 382 states and 611 transitions. [2021-11-07 01:12:17,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:12:17,070 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:12:17,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:17,099 INFO L225 Difference]: With dead ends: 382 [2021-11-07 01:12:17,100 INFO L226 Difference]: Without dead ends: 305 [2021-11-07 01:12:17,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:12:17,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-07 01:12:17,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 299. [2021-11-07 01:12:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.3724832214765101) internal successors, (409), 298 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:17,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 409 transitions. [2021-11-07 01:12:17,207 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 409 transitions. Word has length 53 [2021-11-07 01:12:17,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:17,207 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 409 transitions. [2021-11-07 01:12:17,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:17,208 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 409 transitions. [2021-11-07 01:12:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:12:17,215 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:17,215 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:17,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:12:17,216 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:17,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:17,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1228272010, now seen corresponding path program 1 times [2021-11-07 01:12:17,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:17,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520942974] [2021-11-07 01:12:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:17,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:17,421 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:17,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520942974] [2021-11-07 01:12:17,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520942974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:17,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:17,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:12:17,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391891133] [2021-11-07 01:12:17,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:12:17,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:17,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:12:17,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:12:17,426 INFO L87 Difference]: Start difference. First operand 299 states and 409 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:17,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:17,770 INFO L93 Difference]: Finished difference Result 715 states and 1007 transitions. [2021-11-07 01:12:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:12:17,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:12:17,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:17,776 INFO L225 Difference]: With dead ends: 715 [2021-11-07 01:12:17,776 INFO L226 Difference]: Without dead ends: 462 [2021-11-07 01:12:17,783 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:12:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-07 01:12:17,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2021-11-07 01:12:17,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.4008714596949892) internal successors, (643), 459 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 643 transitions. [2021-11-07 01:12:17,886 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 643 transitions. Word has length 54 [2021-11-07 01:12:17,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:17,887 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 643 transitions. [2021-11-07 01:12:17,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:17,887 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 643 transitions. [2021-11-07 01:12:17,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:12:17,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:17,900 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:17,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:12:17,901 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:17,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:17,904 INFO L85 PathProgramCache]: Analyzing trace with hash -435491736, now seen corresponding path program 1 times [2021-11-07 01:12:17,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:17,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140944236] [2021-11-07 01:12:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:17,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:18,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:18,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140944236] [2021-11-07 01:12:18,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140944236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:18,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:18,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:12:18,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939213782] [2021-11-07 01:12:18,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:12:18,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:18,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:12:18,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:12:18,026 INFO L87 Difference]: Start difference. First operand 460 states and 643 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:18,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:18,300 INFO L93 Difference]: Finished difference Result 1148 states and 1645 transitions. [2021-11-07 01:12:18,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:12:18,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:12:18,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:18,307 INFO L225 Difference]: With dead ends: 1148 [2021-11-07 01:12:18,307 INFO L226 Difference]: Without dead ends: 784 [2021-11-07 01:12:18,308 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:12:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-11-07 01:12:18,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 782. [2021-11-07 01:12:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 1.4225352112676057) internal successors, (1111), 781 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:18,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1111 transitions. [2021-11-07 01:12:18,408 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1111 transitions. Word has length 54 [2021-11-07 01:12:18,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:18,409 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 1111 transitions. [2021-11-07 01:12:18,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:18,410 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1111 transitions. [2021-11-07 01:12:18,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:12:18,411 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:18,411 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:18,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:12:18,412 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:18,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:18,413 INFO L85 PathProgramCache]: Analyzing trace with hash -602210855, now seen corresponding path program 1 times [2021-11-07 01:12:18,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:18,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727178538] [2021-11-07 01:12:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:18,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:18,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:18,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727178538] [2021-11-07 01:12:18,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727178538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:18,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:18,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:12:18,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040752927] [2021-11-07 01:12:18,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:12:18,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:18,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:12:18,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:12:18,519 INFO L87 Difference]: Start difference. First operand 782 states and 1111 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:18,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:18,912 INFO L93 Difference]: Finished difference Result 2141 states and 3090 transitions. [2021-11-07 01:12:18,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:12:18,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:12:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:18,924 INFO L225 Difference]: With dead ends: 2141 [2021-11-07 01:12:18,925 INFO L226 Difference]: Without dead ends: 1428 [2021-11-07 01:12:18,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:12:18,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-11-07 01:12:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1426. [2021-11-07 01:12:19,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 1.4308771929824562) internal successors, (2039), 1425 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:19,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 2039 transitions. [2021-11-07 01:12:19,097 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 2039 transitions. Word has length 54 [2021-11-07 01:12:19,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:19,097 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 2039 transitions. [2021-11-07 01:12:19,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:19,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 2039 transitions. [2021-11-07 01:12:19,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:12:19,099 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:19,100 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:19,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:12:19,100 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:19,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:19,101 INFO L85 PathProgramCache]: Analyzing trace with hash -821400251, now seen corresponding path program 1 times [2021-11-07 01:12:19,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:19,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602822222] [2021-11-07 01:12:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:19,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:20,053 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:20,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602822222] [2021-11-07 01:12:20,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602822222] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:20,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:20,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-07 01:12:20,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061672879] [2021-11-07 01:12:20,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:12:20,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:20,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:12:20,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:12:20,056 INFO L87 Difference]: Start difference. First operand 1426 states and 2039 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:21,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:21,549 INFO L93 Difference]: Finished difference Result 2965 states and 4241 transitions. [2021-11-07 01:12:21,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:12:21,550 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:12:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:21,574 INFO L225 Difference]: With dead ends: 2965 [2021-11-07 01:12:21,574 INFO L226 Difference]: Without dead ends: 2963 [2021-11-07 01:12:21,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:12:21,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2021-11-07 01:12:21,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2282. [2021-11-07 01:12:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 1.4287593160894345) internal successors, (3259), 2281 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:21,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3259 transitions. [2021-11-07 01:12:21,931 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3259 transitions. Word has length 55 [2021-11-07 01:12:21,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:21,931 INFO L470 AbstractCegarLoop]: Abstraction has 2282 states and 3259 transitions. [2021-11-07 01:12:21,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:21,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3259 transitions. [2021-11-07 01:12:21,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:12:21,933 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:21,933 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:21,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:12:21,934 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:21,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:21,935 INFO L85 PathProgramCache]: Analyzing trace with hash -925639419, now seen corresponding path program 1 times [2021-11-07 01:12:21,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:21,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456358637] [2021-11-07 01:12:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:21,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:22,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:22,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456358637] [2021-11-07 01:12:22,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456358637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:22,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:22,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-07 01:12:22,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964807466] [2021-11-07 01:12:22,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:12:22,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:22,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:12:22,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:12:22,728 INFO L87 Difference]: Start difference. First operand 2282 states and 3259 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:24,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:24,052 INFO L93 Difference]: Finished difference Result 2678 states and 3800 transitions. [2021-11-07 01:12:24,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:12:24,053 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:12:24,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:24,073 INFO L225 Difference]: With dead ends: 2678 [2021-11-07 01:12:24,073 INFO L226 Difference]: Without dead ends: 2676 [2021-11-07 01:12:24,076 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-11-07 01:12:24,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-11-07 01:12:24,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2301. [2021-11-07 01:12:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 2300 states have (on average 1.4260869565217391) internal successors, (3280), 2300 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 3280 transitions. [2021-11-07 01:12:24,378 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 3280 transitions. Word has length 55 [2021-11-07 01:12:24,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:24,380 INFO L470 AbstractCegarLoop]: Abstraction has 2301 states and 3280 transitions. [2021-11-07 01:12:24,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:24,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 3280 transitions. [2021-11-07 01:12:24,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:12:24,381 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:24,382 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:24,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:12:24,382 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:24,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:24,384 INFO L85 PathProgramCache]: Analyzing trace with hash -606699227, now seen corresponding path program 1 times [2021-11-07 01:12:24,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:24,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78099329] [2021-11-07 01:12:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:24,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:25,118 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:25,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78099329] [2021-11-07 01:12:25,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78099329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:25,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:25,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-07 01:12:25,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618709108] [2021-11-07 01:12:25,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:12:25,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:25,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:12:25,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:12:25,122 INFO L87 Difference]: Start difference. First operand 2301 states and 3280 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:26,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:26,330 INFO L93 Difference]: Finished difference Result 3368 states and 4796 transitions. [2021-11-07 01:12:26,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:12:26,330 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:12:26,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:26,351 INFO L225 Difference]: With dead ends: 3368 [2021-11-07 01:12:26,351 INFO L226 Difference]: Without dead ends: 2998 [2021-11-07 01:12:26,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:12:26,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2998 states. [2021-11-07 01:12:26,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2998 to 2637. [2021-11-07 01:12:26,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 2636 states have (on average 1.4233687405159332) internal successors, (3752), 2636 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 3752 transitions. [2021-11-07 01:12:26,638 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 3752 transitions. Word has length 55 [2021-11-07 01:12:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:26,638 INFO L470 AbstractCegarLoop]: Abstraction has 2637 states and 3752 transitions. [2021-11-07 01:12:26,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 3752 transitions. [2021-11-07 01:12:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:12:26,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:26,640 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:26,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:12:26,641 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:26,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:26,641 INFO L85 PathProgramCache]: Analyzing trace with hash -342482395, now seen corresponding path program 1 times [2021-11-07 01:12:26,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:26,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080409990] [2021-11-07 01:12:26,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:26,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:26,696 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:26,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080409990] [2021-11-07 01:12:26,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080409990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:26,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:26,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:12:26,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326757995] [2021-11-07 01:12:26,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:12:26,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:26,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:12:26,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:12:26,700 INFO L87 Difference]: Start difference. First operand 2637 states and 3752 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:27,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:27,028 INFO L93 Difference]: Finished difference Result 4015 states and 5737 transitions. [2021-11-07 01:12:27,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:12:27,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:12:27,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:27,046 INFO L225 Difference]: With dead ends: 4015 [2021-11-07 01:12:27,046 INFO L226 Difference]: Without dead ends: 2637 [2021-11-07 01:12:27,049 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:12:27,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-11-07 01:12:27,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2637. [2021-11-07 01:12:27,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 2636 states have (on average 1.42298937784522) internal successors, (3751), 2636 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:27,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 3751 transitions. [2021-11-07 01:12:27,336 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 3751 transitions. Word has length 55 [2021-11-07 01:12:27,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:27,336 INFO L470 AbstractCegarLoop]: Abstraction has 2637 states and 3751 transitions. [2021-11-07 01:12:27,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:27,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 3751 transitions. [2021-11-07 01:12:27,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:12:27,338 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:27,338 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:27,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:12:27,339 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:27,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:27,340 INFO L85 PathProgramCache]: Analyzing trace with hash -444195845, now seen corresponding path program 1 times [2021-11-07 01:12:27,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:27,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662938380] [2021-11-07 01:12:27,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:27,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:27,968 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:27,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662938380] [2021-11-07 01:12:27,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662938380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:27,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:27,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-07 01:12:27,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863885872] [2021-11-07 01:12:27,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:12:27,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:27,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:12:27,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:12:27,970 INFO L87 Difference]: Start difference. First operand 2637 states and 3751 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:29,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:29,272 INFO L93 Difference]: Finished difference Result 4985 states and 7136 transitions. [2021-11-07 01:12:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:12:29,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 01:12:29,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:29,323 INFO L225 Difference]: With dead ends: 4985 [2021-11-07 01:12:29,324 INFO L226 Difference]: Without dead ends: 4983 [2021-11-07 01:12:29,326 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:12:29,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4983 states. [2021-11-07 01:12:29,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4983 to 3106. [2021-11-07 01:12:29,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3106 states, 3105 states have (on average 1.4260869565217391) internal successors, (4428), 3105 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:29,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 4428 transitions. [2021-11-07 01:12:29,674 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 4428 transitions. Word has length 56 [2021-11-07 01:12:29,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:29,674 INFO L470 AbstractCegarLoop]: Abstraction has 3106 states and 4428 transitions. [2021-11-07 01:12:29,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:29,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 4428 transitions. [2021-11-07 01:12:29,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:12:29,676 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:29,676 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:29,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:12:29,677 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:29,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:29,677 INFO L85 PathProgramCache]: Analyzing trace with hash -2032117255, now seen corresponding path program 1 times [2021-11-07 01:12:29,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:29,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328595200] [2021-11-07 01:12:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:29,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:30,351 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:30,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328595200] [2021-11-07 01:12:30,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328595200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:30,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:30,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-07 01:12:30,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427036335] [2021-11-07 01:12:30,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 01:12:30,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:30,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 01:12:30,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:12:30,353 INFO L87 Difference]: Start difference. First operand 3106 states and 4428 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:31,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:31,413 INFO L93 Difference]: Finished difference Result 5477 states and 7818 transitions. [2021-11-07 01:12:31,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:12:31,413 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:12:31,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:31,444 INFO L225 Difference]: With dead ends: 5477 [2021-11-07 01:12:31,445 INFO L226 Difference]: Without dead ends: 5475 [2021-11-07 01:12:31,448 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2021-11-07 01:12:31,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5475 states. [2021-11-07 01:12:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5475 to 3108. [2021-11-07 01:12:31,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 1.4254908271644673) internal successors, (4429), 3107 states have internal predecessors, (4429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:31,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4429 transitions. [2021-11-07 01:12:31,829 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4429 transitions. Word has length 57 [2021-11-07 01:12:31,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:31,830 INFO L470 AbstractCegarLoop]: Abstraction has 3108 states and 4429 transitions. [2021-11-07 01:12:31,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:31,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4429 transitions. [2021-11-07 01:12:31,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:12:31,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:31,832 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:31,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:12:31,832 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:31,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:31,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1713177063, now seen corresponding path program 1 times [2021-11-07 01:12:31,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:31,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580718918] [2021-11-07 01:12:31,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:31,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:32,427 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:32,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580718918] [2021-11-07 01:12:32,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580718918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:32,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:32,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-07 01:12:32,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567819039] [2021-11-07 01:12:32,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 01:12:32,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:32,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 01:12:32,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:12:32,430 INFO L87 Difference]: Start difference. First operand 3108 states and 4429 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:33,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:33,391 INFO L93 Difference]: Finished difference Result 4191 states and 5963 transitions. [2021-11-07 01:12:33,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:12:33,392 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:12:33,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:33,412 INFO L225 Difference]: With dead ends: 4191 [2021-11-07 01:12:33,412 INFO L226 Difference]: Without dead ends: 3821 [2021-11-07 01:12:33,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-11-07 01:12:33,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3821 states. [2021-11-07 01:12:33,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3821 to 3105. [2021-11-07 01:12:33,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3105 states, 3104 states have (on average 1.4255798969072164) internal successors, (4425), 3104 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:33,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3105 states to 3105 states and 4425 transitions. [2021-11-07 01:12:33,808 INFO L78 Accepts]: Start accepts. Automaton has 3105 states and 4425 transitions. Word has length 57 [2021-11-07 01:12:33,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:33,809 INFO L470 AbstractCegarLoop]: Abstraction has 3105 states and 4425 transitions. [2021-11-07 01:12:33,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:33,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3105 states and 4425 transitions. [2021-11-07 01:12:33,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:12:33,811 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:33,811 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:33,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 01:12:33,812 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:33,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:33,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1862863399, now seen corresponding path program 1 times [2021-11-07 01:12:33,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:33,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956345826] [2021-11-07 01:12:33,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:33,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:34,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:34,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956345826] [2021-11-07 01:12:34,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956345826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:34,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:34,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-07 01:12:34,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137271834] [2021-11-07 01:12:34,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 01:12:34,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:34,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 01:12:34,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:12:34,480 INFO L87 Difference]: Start difference. First operand 3105 states and 4425 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:35,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:35,446 INFO L93 Difference]: Finished difference Result 3674 states and 5213 transitions. [2021-11-07 01:12:35,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:12:35,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:12:35,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:35,456 INFO L225 Difference]: With dead ends: 3674 [2021-11-07 01:12:35,457 INFO L226 Difference]: Without dead ends: 3672 [2021-11-07 01:12:35,458 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:12:35,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2021-11-07 01:12:35,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 3118. [2021-11-07 01:12:35,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3118 states, 3117 states have (on average 1.4247674045556624) internal successors, (4441), 3117 states have internal predecessors, (4441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3118 states to 3118 states and 4441 transitions. [2021-11-07 01:12:35,761 INFO L78 Accepts]: Start accepts. Automaton has 3118 states and 4441 transitions. Word has length 57 [2021-11-07 01:12:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:35,761 INFO L470 AbstractCegarLoop]: Abstraction has 3118 states and 4441 transitions. [2021-11-07 01:12:35,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 3118 states and 4441 transitions. [2021-11-07 01:12:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:12:35,763 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:35,763 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:35,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 01:12:35,764 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:35,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1911306318, now seen corresponding path program 1 times [2021-11-07 01:12:35,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:35,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768161669] [2021-11-07 01:12:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:35,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:35,802 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:35,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768161669] [2021-11-07 01:12:35,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768161669] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:35,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:35,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:12:35,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468077225] [2021-11-07 01:12:35,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:12:35,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:35,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:12:35,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:12:35,805 INFO L87 Difference]: Start difference. First operand 3118 states and 4441 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:36,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:36,084 INFO L93 Difference]: Finished difference Result 5177 states and 7414 transitions. [2021-11-07 01:12:36,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:12:36,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:12:36,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:36,090 INFO L225 Difference]: With dead ends: 5177 [2021-11-07 01:12:36,090 INFO L226 Difference]: Without dead ends: 3001 [2021-11-07 01:12:36,093 INFO L786 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 [2021-11-07 01:12:36,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-11-07 01:12:36,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2998. [2021-11-07 01:12:36,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2997 states have (on average 1.4224224224224224) internal successors, (4263), 2997 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 4263 transitions. [2021-11-07 01:12:36,323 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 4263 transitions. Word has length 58 [2021-11-07 01:12:36,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:36,324 INFO L470 AbstractCegarLoop]: Abstraction has 2998 states and 4263 transitions. [2021-11-07 01:12:36,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:36,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 4263 transitions. [2021-11-07 01:12:36,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:12:36,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:36,326 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:36,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 01:12:36,327 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:36,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:36,327 INFO L85 PathProgramCache]: Analyzing trace with hash -671794641, now seen corresponding path program 1 times [2021-11-07 01:12:36,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:36,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174702868] [2021-11-07 01:12:36,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:36,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:36,364 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:36,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174702868] [2021-11-07 01:12:36,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174702868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:36,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:36,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:12:36,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817842302] [2021-11-07 01:12:36,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:12:36,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:36,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:12:36,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:12:36,367 INFO L87 Difference]: Start difference. First operand 2998 states and 4263 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:36,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:36,631 INFO L93 Difference]: Finished difference Result 5534 states and 7920 transitions. [2021-11-07 01:12:36,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:12:36,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:12:36,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:36,636 INFO L225 Difference]: With dead ends: 5534 [2021-11-07 01:12:36,637 INFO L226 Difference]: Without dead ends: 2906 [2021-11-07 01:12:36,641 INFO L786 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 [2021-11-07 01:12:36,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2021-11-07 01:12:36,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 2882. [2021-11-07 01:12:36,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2882 states, 2881 states have (on average 1.4192988545643874) internal successors, (4089), 2881 states have internal predecessors, (4089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:36,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2882 states to 2882 states and 4089 transitions. [2021-11-07 01:12:36,927 INFO L78 Accepts]: Start accepts. Automaton has 2882 states and 4089 transitions. Word has length 58 [2021-11-07 01:12:36,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:36,927 INFO L470 AbstractCegarLoop]: Abstraction has 2882 states and 4089 transitions. [2021-11-07 01:12:36,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:36,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2882 states and 4089 transitions. [2021-11-07 01:12:36,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:12:36,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:36,929 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:36,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 01:12:36,929 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:36,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:36,930 INFO L85 PathProgramCache]: Analyzing trace with hash -211696785, now seen corresponding path program 1 times [2021-11-07 01:12:36,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:36,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218652678] [2021-11-07 01:12:36,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:36,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:37,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:37,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218652678] [2021-11-07 01:12:37,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218652678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:37,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:37,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-07 01:12:37,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165300050] [2021-11-07 01:12:37,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 01:12:37,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:37,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 01:12:37,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:12:37,524 INFO L87 Difference]: Start difference. First operand 2882 states and 4089 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:38,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:38,889 INFO L93 Difference]: Finished difference Result 5102 states and 7256 transitions. [2021-11-07 01:12:38,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:12:38,890 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:12:38,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:38,901 INFO L225 Difference]: With dead ends: 5102 [2021-11-07 01:12:38,901 INFO L226 Difference]: Without dead ends: 5100 [2021-11-07 01:12:38,906 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-11-07 01:12:38,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5100 states. [2021-11-07 01:12:39,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5100 to 2872. [2021-11-07 01:12:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 1.4207593173110415) internal successors, (4079), 2871 states have internal predecessors, (4079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:39,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 4079 transitions. [2021-11-07 01:12:39,249 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 4079 transitions. Word has length 58 [2021-11-07 01:12:39,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:39,250 INFO L470 AbstractCegarLoop]: Abstraction has 2872 states and 4079 transitions. [2021-11-07 01:12:39,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:39,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 4079 transitions. [2021-11-07 01:12:39,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:12:39,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:39,251 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:39,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 01:12:39,251 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:39,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:39,251 INFO L85 PathProgramCache]: Analyzing trace with hash -315935953, now seen corresponding path program 1 times [2021-11-07 01:12:39,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:39,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296279324] [2021-11-07 01:12:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:39,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:39,921 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:39,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296279324] [2021-11-07 01:12:39,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296279324] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:39,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:39,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-07 01:12:39,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606264539] [2021-11-07 01:12:39,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 01:12:39,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:39,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 01:12:39,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:12:39,924 INFO L87 Difference]: Start difference. First operand 2872 states and 4079 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:41,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:41,389 INFO L93 Difference]: Finished difference Result 4810 states and 6818 transitions. [2021-11-07 01:12:41,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 01:12:41,390 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:12:41,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:41,399 INFO L225 Difference]: With dead ends: 4810 [2021-11-07 01:12:41,400 INFO L226 Difference]: Without dead ends: 4808 [2021-11-07 01:12:41,401 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2021-11-07 01:12:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4808 states. [2021-11-07 01:12:41,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4808 to 2872. [2021-11-07 01:12:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 1.4207593173110415) internal successors, (4079), 2871 states have internal predecessors, (4079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 4079 transitions. [2021-11-07 01:12:41,726 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 4079 transitions. Word has length 58 [2021-11-07 01:12:41,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:41,726 INFO L470 AbstractCegarLoop]: Abstraction has 2872 states and 4079 transitions. [2021-11-07 01:12:41,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:41,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 4079 transitions. [2021-11-07 01:12:41,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:12:41,728 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:41,728 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:41,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 01:12:41,728 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:41,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:41,729 INFO L85 PathProgramCache]: Analyzing trace with hash 3004239, now seen corresponding path program 1 times [2021-11-07 01:12:41,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:41,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927816175] [2021-11-07 01:12:41,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:41,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:42,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:42,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927816175] [2021-11-07 01:12:42,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927816175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:42,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:42,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-07 01:12:42,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021964225] [2021-11-07 01:12:42,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 01:12:42,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:42,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 01:12:42,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:12:42,326 INFO L87 Difference]: Start difference. First operand 2872 states and 4079 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:43,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:43,349 INFO L93 Difference]: Finished difference Result 6257 states and 8922 transitions. [2021-11-07 01:12:43,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:12:43,350 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:12:43,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:43,363 INFO L225 Difference]: With dead ends: 6257 [2021-11-07 01:12:43,363 INFO L226 Difference]: Without dead ends: 5551 [2021-11-07 01:12:43,367 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:12:43,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-11-07 01:12:43,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 3160. [2021-11-07 01:12:43,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3160 states, 3159 states have (on average 1.415954415954416) internal successors, (4473), 3159 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 4473 transitions. [2021-11-07 01:12:43,774 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 4473 transitions. Word has length 58 [2021-11-07 01:12:43,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:43,775 INFO L470 AbstractCegarLoop]: Abstraction has 3160 states and 4473 transitions. [2021-11-07 01:12:43,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:43,775 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 4473 transitions. [2021-11-07 01:12:43,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:12:43,776 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:43,777 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:43,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 01:12:43,777 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:43,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:43,778 INFO L85 PathProgramCache]: Analyzing trace with hash -36174387, now seen corresponding path program 1 times [2021-11-07 01:12:43,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:43,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556349570] [2021-11-07 01:12:43,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:43,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:45,309 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:45,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556349570] [2021-11-07 01:12:45,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556349570] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:45,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:45,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-07 01:12:45,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434788114] [2021-11-07 01:12:45,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 01:12:45,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:45,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 01:12:45,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:12:45,311 INFO L87 Difference]: Start difference. First operand 3160 states and 4473 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:47,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:47,389 INFO L93 Difference]: Finished difference Result 3700 states and 5217 transitions. [2021-11-07 01:12:47,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:12:47,390 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:12:47,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:47,396 INFO L225 Difference]: With dead ends: 3700 [2021-11-07 01:12:47,396 INFO L226 Difference]: Without dead ends: 3698 [2021-11-07 01:12:47,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=347, Invalid=1135, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 01:12:47,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3698 states. [2021-11-07 01:12:47,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3698 to 3157. [2021-11-07 01:12:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 1.4160329531051965) internal successors, (4469), 3156 states have internal predecessors, (4469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:47,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 4469 transitions. [2021-11-07 01:12:47,799 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 4469 transitions. Word has length 59 [2021-11-07 01:12:47,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:47,799 INFO L470 AbstractCegarLoop]: Abstraction has 3157 states and 4469 transitions. [2021-11-07 01:12:47,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:47,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 4469 transitions. [2021-11-07 01:12:47,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:12:47,801 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:47,801 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:47,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 01:12:47,802 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:47,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:47,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1738631967, now seen corresponding path program 1 times [2021-11-07 01:12:47,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:47,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684461283] [2021-11-07 01:12:47,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:47,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:47,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:47,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684461283] [2021-11-07 01:12:47,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684461283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:47,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:47,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:12:47,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456846797] [2021-11-07 01:12:47,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:12:47,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:47,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:12:47,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:12:47,842 INFO L87 Difference]: Start difference. First operand 3157 states and 4469 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:48,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:48,284 INFO L93 Difference]: Finished difference Result 5360 states and 7622 transitions. [2021-11-07 01:12:48,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:12:48,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:12:48,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:48,288 INFO L225 Difference]: With dead ends: 5360 [2021-11-07 01:12:48,288 INFO L226 Difference]: Without dead ends: 3016 [2021-11-07 01:12:48,292 INFO L786 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 [2021-11-07 01:12:48,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2021-11-07 01:12:48,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3014. [2021-11-07 01:12:48,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 3013 states have (on average 1.4145370063060072) internal successors, (4262), 3013 states have internal predecessors, (4262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:48,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 4262 transitions. [2021-11-07 01:12:48,617 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 4262 transitions. Word has length 59 [2021-11-07 01:12:48,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:48,617 INFO L470 AbstractCegarLoop]: Abstraction has 3014 states and 4262 transitions. [2021-11-07 01:12:48,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:48,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 4262 transitions. [2021-11-07 01:12:48,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:12:48,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:48,619 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:48,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 01:12:48,619 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:48,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:48,620 INFO L85 PathProgramCache]: Analyzing trace with hash -222638685, now seen corresponding path program 1 times [2021-11-07 01:12:48,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:48,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001670417] [2021-11-07 01:12:48,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:48,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:51,179 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:51,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001670417] [2021-11-07 01:12:51,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001670417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:51,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:51,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-11-07 01:12:51,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726973813] [2021-11-07 01:12:51,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 01:12:51,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:51,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 01:12:51,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-11-07 01:12:51,181 INFO L87 Difference]: Start difference. First operand 3014 states and 4262 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:56,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:56,363 INFO L93 Difference]: Finished difference Result 3348 states and 4719 transitions. [2021-11-07 01:12:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 01:12:56,363 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-11-07 01:12:56,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:56,367 INFO L225 Difference]: With dead ends: 3348 [2021-11-07 01:12:56,367 INFO L226 Difference]: Without dead ends: 3346 [2021-11-07 01:12:56,369 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=716, Invalid=2476, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 01:12:56,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3346 states. [2021-11-07 01:12:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3346 to 3010. [2021-11-07 01:12:56,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 1.4147557328015952) internal successors, (4257), 3009 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:56,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 4257 transitions. [2021-11-07 01:12:56,738 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 4257 transitions. Word has length 60 [2021-11-07 01:12:56,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:56,739 INFO L470 AbstractCegarLoop]: Abstraction has 3010 states and 4257 transitions. [2021-11-07 01:12:56,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:56,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 4257 transitions. [2021-11-07 01:12:56,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:12:56,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:56,741 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:56,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 01:12:56,741 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:56,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:56,742 INFO L85 PathProgramCache]: Analyzing trace with hash 96301507, now seen corresponding path program 1 times [2021-11-07 01:12:56,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:56,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264747746] [2021-11-07 01:12:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:56,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:59,208 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:59,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264747746] [2021-11-07 01:12:59,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264747746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:59,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:59,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-11-07 01:12:59,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507817667] [2021-11-07 01:12:59,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 01:12:59,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:12:59,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 01:12:59,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:12:59,211 INFO L87 Difference]: Start difference. First operand 3010 states and 4257 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:03,728 INFO L93 Difference]: Finished difference Result 4065 states and 5740 transitions. [2021-11-07 01:13:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 01:13:03,728 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-11-07 01:13:03,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:03,733 INFO L225 Difference]: With dead ends: 4065 [2021-11-07 01:13:03,733 INFO L226 Difference]: Without dead ends: 4063 [2021-11-07 01:13:03,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=483, Invalid=1773, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 01:13:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4063 states. [2021-11-07 01:13:04,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4063 to 3010. [2021-11-07 01:13:04,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 1.4147557328015952) internal successors, (4257), 3009 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 4257 transitions. [2021-11-07 01:13:04,139 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 4257 transitions. Word has length 60 [2021-11-07 01:13:04,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:04,140 INFO L470 AbstractCegarLoop]: Abstraction has 3010 states and 4257 transitions. [2021-11-07 01:13:04,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 4257 transitions. [2021-11-07 01:13:04,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:13:04,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:04,141 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:04,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 01:13:04,141 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:04,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:04,142 INFO L85 PathProgramCache]: Analyzing trace with hash -53384829, now seen corresponding path program 1 times [2021-11-07 01:13:04,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:04,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998200867] [2021-11-07 01:13:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:04,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:06,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:06,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998200867] [2021-11-07 01:13:06,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998200867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:06,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:06,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-07 01:13:06,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421463571] [2021-11-07 01:13:06,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 01:13:06,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:06,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 01:13:06,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:13:06,286 INFO L87 Difference]: Start difference. First operand 3010 states and 4257 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:10,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:10,499 INFO L93 Difference]: Finished difference Result 3355 states and 4726 transitions. [2021-11-07 01:13:10,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 01:13:10,500 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-11-07 01:13:10,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:10,504 INFO L225 Difference]: With dead ends: 3355 [2021-11-07 01:13:10,504 INFO L226 Difference]: Without dead ends: 3353 [2021-11-07 01:13:10,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=562, Invalid=1790, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 01:13:10,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3353 states. [2021-11-07 01:13:10,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3353 to 3004. [2021-11-07 01:13:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 3003 states have (on average 1.4152514152514153) internal successors, (4250), 3003 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:10,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 4250 transitions. [2021-11-07 01:13:10,841 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 4250 transitions. Word has length 60 [2021-11-07 01:13:10,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:10,841 INFO L470 AbstractCegarLoop]: Abstraction has 3004 states and 4250 transitions. [2021-11-07 01:13:10,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:10,842 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 4250 transitions. [2021-11-07 01:13:10,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:13:10,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:10,843 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:10,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 01:13:10,844 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:10,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:10,844 INFO L85 PathProgramCache]: Analyzing trace with hash -589023497, now seen corresponding path program 1 times [2021-11-07 01:13:10,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:10,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168688103] [2021-11-07 01:13:10,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:10,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:18,454 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:18,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168688103] [2021-11-07 01:13:18,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168688103] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:18,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:18,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-11-07 01:13:18,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123990563] [2021-11-07 01:13:18,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 01:13:18,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:18,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 01:13:18,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:13:18,456 INFO L87 Difference]: Start difference. First operand 3004 states and 4250 transitions. Second operand has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:27,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:27,596 INFO L93 Difference]: Finished difference Result 3336 states and 4707 transitions. [2021-11-07 01:13:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 01:13:27,597 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-11-07 01:13:27,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:27,601 INFO L225 Difference]: With dead ends: 3336 [2021-11-07 01:13:27,601 INFO L226 Difference]: Without dead ends: 3334 [2021-11-07 01:13:27,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=914, Invalid=3246, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 01:13:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-11-07 01:13:27,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2992. [2021-11-07 01:13:27,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2992 states, 2991 states have (on average 1.416917418923437) internal successors, (4238), 2991 states have internal predecessors, (4238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 4238 transitions. [2021-11-07 01:13:27,938 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 4238 transitions. Word has length 62 [2021-11-07 01:13:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:27,938 INFO L470 AbstractCegarLoop]: Abstraction has 2992 states and 4238 transitions. [2021-11-07 01:13:27,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:27,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 4238 transitions. [2021-11-07 01:13:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:13:27,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:27,940 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:27,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 01:13:27,940 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:27,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:27,941 INFO L85 PathProgramCache]: Analyzing trace with hash -419450449, now seen corresponding path program 1 times [2021-11-07 01:13:27,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:27,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267351254] [2021-11-07 01:13:27,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:27,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:27,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:27,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267351254] [2021-11-07 01:13:27,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267351254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:27,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:27,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:27,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245531577] [2021-11-07 01:13:27,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:13:27,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:27,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:13:28,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:28,000 INFO L87 Difference]: Start difference. First operand 2992 states and 4238 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:28,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:28,636 INFO L93 Difference]: Finished difference Result 5335 states and 7647 transitions. [2021-11-07 01:13:28,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:13:28,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-07 01:13:28,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:28,643 INFO L225 Difference]: With dead ends: 5335 [2021-11-07 01:13:28,643 INFO L226 Difference]: Without dead ends: 4189 [2021-11-07 01:13:28,646 INFO L786 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 [2021-11-07 01:13:28,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2021-11-07 01:13:29,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 3964. [2021-11-07 01:13:29,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3964 states, 3963 states have (on average 1.414584910421398) internal successors, (5606), 3963 states have internal predecessors, (5606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3964 states to 3964 states and 5606 transitions. [2021-11-07 01:13:29,267 INFO L78 Accepts]: Start accepts. Automaton has 3964 states and 5606 transitions. Word has length 66 [2021-11-07 01:13:29,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:29,268 INFO L470 AbstractCegarLoop]: Abstraction has 3964 states and 5606 transitions. [2021-11-07 01:13:29,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:29,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3964 states and 5606 transitions. [2021-11-07 01:13:29,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:13:29,269 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:29,269 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:29,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-07 01:13:29,269 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:29,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:29,270 INFO L85 PathProgramCache]: Analyzing trace with hash -217638558, now seen corresponding path program 1 times [2021-11-07 01:13:29,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:29,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602866537] [2021-11-07 01:13:29,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:29,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:29,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:29,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602866537] [2021-11-07 01:13:29,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602866537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:29,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:29,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:29,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530234649] [2021-11-07 01:13:29,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:13:29,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:29,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:13:29,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:29,328 INFO L87 Difference]: Start difference. First operand 3964 states and 5606 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:29,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:29,862 INFO L93 Difference]: Finished difference Result 7283 states and 10400 transitions. [2021-11-07 01:13:29,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:13:29,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:13:29,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:29,868 INFO L225 Difference]: With dead ends: 7283 [2021-11-07 01:13:29,868 INFO L226 Difference]: Without dead ends: 5185 [2021-11-07 01:13:29,871 INFO L786 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 [2021-11-07 01:13:29,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5185 states. [2021-11-07 01:13:30,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5185 to 4823. [2021-11-07 01:13:30,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4823 states, 4822 states have (on average 1.4110327664869349) internal successors, (6804), 4822 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:30,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4823 states to 4823 states and 6804 transitions. [2021-11-07 01:13:30,389 INFO L78 Accepts]: Start accepts. Automaton has 4823 states and 6804 transitions. Word has length 68 [2021-11-07 01:13:30,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:30,390 INFO L470 AbstractCegarLoop]: Abstraction has 4823 states and 6804 transitions. [2021-11-07 01:13:30,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:30,390 INFO L276 IsEmpty]: Start isEmpty. Operand 4823 states and 6804 transitions. [2021-11-07 01:13:30,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:13:30,392 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:30,392 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:30,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-07 01:13:30,393 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:30,393 INFO L85 PathProgramCache]: Analyzing trace with hash -208660435, now seen corresponding path program 1 times [2021-11-07 01:13:30,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:30,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438136501] [2021-11-07 01:13:30,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:30,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:30,440 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:30,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438136501] [2021-11-07 01:13:30,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438136501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:30,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:30,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:30,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896642270] [2021-11-07 01:13:30,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:13:30,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:30,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:13:30,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:30,442 INFO L87 Difference]: Start difference. First operand 4823 states and 6804 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:31,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:31,368 INFO L93 Difference]: Finished difference Result 9307 states and 13115 transitions. [2021-11-07 01:13:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:13:31,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:13:31,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:31,377 INFO L225 Difference]: With dead ends: 9307 [2021-11-07 01:13:31,377 INFO L226 Difference]: Without dead ends: 6661 [2021-11-07 01:13:31,381 INFO L786 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 [2021-11-07 01:13:31,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6661 states. [2021-11-07 01:13:32,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6661 to 6659. [2021-11-07 01:13:32,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6659 states, 6658 states have (on average 1.3966656653649745) internal successors, (9299), 6658 states have internal predecessors, (9299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:32,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6659 states to 6659 states and 9299 transitions. [2021-11-07 01:13:32,219 INFO L78 Accepts]: Start accepts. Automaton has 6659 states and 9299 transitions. Word has length 71 [2021-11-07 01:13:32,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:32,219 INFO L470 AbstractCegarLoop]: Abstraction has 6659 states and 9299 transitions. [2021-11-07 01:13:32,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:32,220 INFO L276 IsEmpty]: Start isEmpty. Operand 6659 states and 9299 transitions. [2021-11-07 01:13:32,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:13:32,221 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:32,221 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:32,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-07 01:13:32,222 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:32,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:32,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1644300269, now seen corresponding path program 1 times [2021-11-07 01:13:32,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:32,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442620014] [2021-11-07 01:13:32,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:32,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:32,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:32,277 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:32,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442620014] [2021-11-07 01:13:32,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442620014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:32,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:32,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:32,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099802310] [2021-11-07 01:13:32,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:13:32,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:32,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:13:32,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:32,279 INFO L87 Difference]: Start difference. First operand 6659 states and 9299 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:33,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:33,472 INFO L93 Difference]: Finished difference Result 13638 states and 19194 transitions. [2021-11-07 01:13:33,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:13:33,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:13:33,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:33,485 INFO L225 Difference]: With dead ends: 13638 [2021-11-07 01:13:33,485 INFO L226 Difference]: Without dead ends: 9212 [2021-11-07 01:13:33,490 INFO L786 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 [2021-11-07 01:13:33,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9212 states. [2021-11-07 01:13:34,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9212 to 8457. [2021-11-07 01:13:34,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8457 states, 8456 states have (on average 1.387771996215705) internal successors, (11735), 8456 states have internal predecessors, (11735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:34,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8457 states to 8457 states and 11735 transitions. [2021-11-07 01:13:34,486 INFO L78 Accepts]: Start accepts. Automaton has 8457 states and 11735 transitions. Word has length 71 [2021-11-07 01:13:34,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:34,486 INFO L470 AbstractCegarLoop]: Abstraction has 8457 states and 11735 transitions. [2021-11-07 01:13:34,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 8457 states and 11735 transitions. [2021-11-07 01:13:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:13:34,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:34,489 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:34,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-07 01:13:34,489 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:34,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:34,490 INFO L85 PathProgramCache]: Analyzing trace with hash -632437645, now seen corresponding path program 1 times [2021-11-07 01:13:34,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:34,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650275977] [2021-11-07 01:13:34,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:34,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:34,551 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:34,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650275977] [2021-11-07 01:13:34,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650275977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:34,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:34,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:34,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938966939] [2021-11-07 01:13:34,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:13:34,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:34,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:13:34,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:34,554 INFO L87 Difference]: Start difference. First operand 8457 states and 11735 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:35,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:35,956 INFO L93 Difference]: Finished difference Result 20013 states and 27910 transitions. [2021-11-07 01:13:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:13:35,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:13:35,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:35,973 INFO L225 Difference]: With dead ends: 20013 [2021-11-07 01:13:35,973 INFO L226 Difference]: Without dead ends: 12437 [2021-11-07 01:13:35,983 INFO L786 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 [2021-11-07 01:13:35,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12437 states. [2021-11-07 01:13:37,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12437 to 11401. [2021-11-07 01:13:37,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11401 states, 11400 states have (on average 1.377280701754386) internal successors, (15701), 11400 states have internal predecessors, (15701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:37,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11401 states to 11401 states and 15701 transitions. [2021-11-07 01:13:37,401 INFO L78 Accepts]: Start accepts. Automaton has 11401 states and 15701 transitions. Word has length 74 [2021-11-07 01:13:37,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:37,401 INFO L470 AbstractCegarLoop]: Abstraction has 11401 states and 15701 transitions. [2021-11-07 01:13:37,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:37,401 INFO L276 IsEmpty]: Start isEmpty. Operand 11401 states and 15701 transitions. [2021-11-07 01:13:37,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:13:37,407 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:37,407 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 01:13:37,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-07 01:13:37,408 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:37,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:37,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1001929684, now seen corresponding path program 1 times [2021-11-07 01:13:37,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:37,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025227809] [2021-11-07 01:13:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:37,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:13:37,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:37,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025227809] [2021-11-07 01:13:37,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025227809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:37,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:37,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:13:37,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314512901] [2021-11-07 01:13:37,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:13:37,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:37,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:13:37,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:13:37,526 INFO L87 Difference]: Start difference. First operand 11401 states and 15701 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:41,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:41,952 INFO L93 Difference]: Finished difference Result 44048 states and 60396 transitions. [2021-11-07 01:13:41,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:13:41,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-07 01:13:41,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:42,019 INFO L225 Difference]: With dead ends: 44048 [2021-11-07 01:13:42,019 INFO L226 Difference]: Without dead ends: 33505 [2021-11-07 01:13:42,036 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:13:42,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33505 states. [2021-11-07 01:13:45,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33505 to 21289. [2021-11-07 01:13:45,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21289 states, 21288 states have (on average 1.357901164975573) internal successors, (28907), 21288 states have internal predecessors, (28907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:45,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21289 states to 21289 states and 28907 transitions. [2021-11-07 01:13:45,226 INFO L78 Accepts]: Start accepts. Automaton has 21289 states and 28907 transitions. Word has length 90 [2021-11-07 01:13:45,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:45,226 INFO L470 AbstractCegarLoop]: Abstraction has 21289 states and 28907 transitions. [2021-11-07 01:13:45,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:45,226 INFO L276 IsEmpty]: Start isEmpty. Operand 21289 states and 28907 transitions. [2021-11-07 01:13:45,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:13:45,235 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:45,235 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 01:13:45,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-07 01:13:45,235 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:45,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:45,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1675532721, now seen corresponding path program 1 times [2021-11-07 01:13:45,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:45,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303462822] [2021-11-07 01:13:45,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:45,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:46,318 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:46,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303462822] [2021-11-07 01:13:46,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303462822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:13:46,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670833206] [2021-11-07 01:13:46,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:46,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:13:46,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:13:46,320 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:13:46,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:13:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:46,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 01:13:46,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:13:49,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:13:52,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670833206] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:52,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:13:52,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14, 11] imperfect sequences [25] total 48 [2021-11-07 01:13:52,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044713252] [2021-11-07 01:13:52,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 01:13:52,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:52,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 01:13:52,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2082, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 01:13:52,023 INFO L87 Difference]: Start difference. First operand 21289 states and 28907 transitions. Second operand has 25 states, 25 states have (on average 6.24) internal successors, (156), 24 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:09,103 INFO L93 Difference]: Finished difference Result 86031 states and 117468 transitions. [2021-11-07 01:14:09,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 01:14:09,104 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.24) internal successors, (156), 24 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-07 01:14:09,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:09,386 INFO L225 Difference]: With dead ends: 86031 [2021-11-07 01:14:09,387 INFO L226 Difference]: Without dead ends: 67433 [2021-11-07 01:14:09,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=671, Invalid=4441, Unknown=0, NotChecked=0, Total=5112 [2021-11-07 01:14:09,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67433 states. [2021-11-07 01:14:15,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67433 to 30147. [2021-11-07 01:14:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30147 states, 30146 states have (on average 1.3568300935447488) internal successors, (40903), 30146 states have internal predecessors, (40903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30147 states to 30147 states and 40903 transitions. [2021-11-07 01:14:15,936 INFO L78 Accepts]: Start accepts. Automaton has 30147 states and 40903 transitions. Word has length 90 [2021-11-07 01:14:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:15,936 INFO L470 AbstractCegarLoop]: Abstraction has 30147 states and 40903 transitions. [2021-11-07 01:14:15,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.24) internal successors, (156), 24 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 30147 states and 40903 transitions. [2021-11-07 01:14:15,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:14:15,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:15,943 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 01:14:15,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-07 01:14:16,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:14:16,144 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:16,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:16,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1818634732, now seen corresponding path program 1 times [2021-11-07 01:14:16,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:14:16,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087925372] [2021-11-07 01:14:16,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:16,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:14:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:14:16,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:14:16,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087925372] [2021-11-07 01:14:16,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087925372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:16,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:16,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:14:16,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255107846] [2021-11-07 01:14:16,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:14:16,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:14:16,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:14:16,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:14:16,269 INFO L87 Difference]: Start difference. First operand 30147 states and 40903 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:28,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:28,976 INFO L93 Difference]: Finished difference Result 89130 states and 120885 transitions. [2021-11-07 01:14:28,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:14:28,976 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-07 01:14:28,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:29,096 INFO L225 Difference]: With dead ends: 89130 [2021-11-07 01:14:29,097 INFO L226 Difference]: Without dead ends: 59745 [2021-11-07 01:14:29,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:14:29,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59745 states. [2021-11-07 01:14:39,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59745 to 48754. [2021-11-07 01:14:39,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48754 states, 48753 states have (on average 1.3403687978175702) internal successors, (65347), 48753 states have internal predecessors, (65347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:39,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48754 states to 48754 states and 65347 transitions. [2021-11-07 01:14:39,512 INFO L78 Accepts]: Start accepts. Automaton has 48754 states and 65347 transitions. Word has length 90 [2021-11-07 01:14:39,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:39,512 INFO L470 AbstractCegarLoop]: Abstraction has 48754 states and 65347 transitions. [2021-11-07 01:14:39,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:39,512 INFO L276 IsEmpty]: Start isEmpty. Operand 48754 states and 65347 transitions. [2021-11-07 01:14:39,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:14:39,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:39,520 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 01:14:39,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-07 01:14:39,520 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:39,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:39,521 INFO L85 PathProgramCache]: Analyzing trace with hash -43790769, now seen corresponding path program 1 times [2021-11-07 01:14:39,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:14:39,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052433728] [2021-11-07 01:14:39,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:39,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:14:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:40,400 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:40,400 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:14:40,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052433728] [2021-11-07 01:14:40,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052433728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:14:40,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556685788] [2021-11-07 01:14:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:40,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:14:40,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:14:40,406 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:14:40,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6be760-2743-4598-b256-a46767b04cfd/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:14:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:41,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-07 01:14:41,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:44,620 INFO L328 TraceCheckSpWp]: Computing backward predicates...