./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.BOUNDED-12.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_9e3b1666-5630-4720-affb-0284b52e36d3/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e3b1666-5630-4720-affb-0284b52e36d3/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_9e3b1666-5630-4720-affb-0284b52e36d3/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e3b1666-5630-4720-affb-0284b52e36d3/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e3b1666-5630-4720-affb-0284b52e36d3/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_9e3b1666-5630-4720-affb-0284b52e36d3/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 fbc1afdc0c527a20ea946075190a27bee4243d56a1bede1487b2df57b3410a93 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:37:07,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:37:07,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:37:07,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:37:07,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:37:07,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:37:07,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:37:07,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:37:07,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:37:07,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:37:07,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:37:07,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:37:07,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:37:07,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:37:07,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:37:07,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:37:07,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:37:07,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:37:07,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:37:07,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:37:07,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:37:07,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:37:07,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:37:07,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:37:07,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:37:07,673 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:37:07,673 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:37:07,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:37:07,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:37:07,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:37:07,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:37:07,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:37:07,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:37:07,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:37:07,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:37:07,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:37:07,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:37:07,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:37:07,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:37:07,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:37:07,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:37:07,689 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e3b1666-5630-4720-affb-0284b52e36d3/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:37:07,745 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:37:07,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:37:07,747 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:37:07,748 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:37:07,748 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:37:07,748 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:37:07,749 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:37:07,749 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:37:07,756 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:37:07,757 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:37:07,758 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:37:07,758 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:37:07,759 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:37:07,759 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:37:07,759 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:37:07,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:37:07,760 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:37:07,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:37:07,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:37:07,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:37:07,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:37:07,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:37:07,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:37:07,762 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:37:07,763 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:37:07,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:37:07,763 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:37:07,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:37:07,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:37:07,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:37:07,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:37:07,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:37:07,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:37:07,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:37:07,767 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:37:07,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:37:07,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:37:07,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:37:07,768 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:37:07,768 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_9e3b1666-5630-4720-affb-0284b52e36d3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e3b1666-5630-4720-affb-0284b52e36d3/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbc1afdc0c527a20ea946075190a27bee4243d56a1bede1487b2df57b3410a93 [2021-11-07 01:37:08,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:37:08,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:37:08,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:37:08,058 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:37:08,059 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:37:08,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e3b1666-5630-4720-affb-0284b52e36d3/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-07 01:37:08,149 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e3b1666-5630-4720-affb-0284b52e36d3/bin/utaipan-UUZaoUuFF8/data/17271633e/244d82a2f4fe414d85ef2bf2e0ae663d/FLAG69d24752c [2021-11-07 01:37:08,690 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:37:08,691 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e3b1666-5630-4720-affb-0284b52e36d3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-07 01:37:08,722 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e3b1666-5630-4720-affb-0284b52e36d3/bin/utaipan-UUZaoUuFF8/data/17271633e/244d82a2f4fe414d85ef2bf2e0ae663d/FLAG69d24752c [2021-11-07 01:37:08,996 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e3b1666-5630-4720-affb-0284b52e36d3/bin/utaipan-UUZaoUuFF8/data/17271633e/244d82a2f4fe414d85ef2bf2e0ae663d [2021-11-07 01:37:08,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:37:09,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:37:09,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:37:09,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:37:09,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:37:09,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:08" (1/1) ... [2021-11-07 01:37:09,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e2e09fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:09, skipping insertion in model container [2021-11-07 01:37:09,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:08" (1/1) ... [2021-11-07 01:37:09,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:37:09,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:37:09,514 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_9e3b1666-5630-4720-affb-0284b52e36d3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[10019,10032] [2021-11-07 01:37:09,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:37:09,631 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:37:09,700 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_9e3b1666-5630-4720-affb-0284b52e36d3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[10019,10032] [2021-11-07 01:37:09,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:37:09,784 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:37:09,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:09 WrapperNode [2021-11-07 01:37:09,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:37:09,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:37:09,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:37:09,786 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:37:09,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:09" (1/1) ... [2021-11-07 01:37:09,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:09" (1/1) ... [2021-11-07 01:37:09,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:37:09,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:37:09,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:37:09,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:37:09,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:09" (1/1) ... [2021-11-07 01:37:09,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:09" (1/1) ... [2021-11-07 01:37:09,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:09" (1/1) ... [2021-11-07 01:37:09,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:09" (1/1) ... [2021-11-07 01:37:09,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:09" (1/1) ... [2021-11-07 01:37:09,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:09" (1/1) ... [2021-11-07 01:37:09,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:09" (1/1) ... [2021-11-07 01:37:09,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:37:09,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:37:09,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:37:09,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:37:09,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:09" (1/1) ... [2021-11-07 01:37:09,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:37:09,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e3b1666-5630-4720-affb-0284b52e36d3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:37:09,963 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e3b1666-5630-4720-affb-0284b52e36d3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:37:09,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e3b1666-5630-4720-affb-0284b52e36d3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:37:10,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:37:10,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:37:10,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:37:10,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:37:11,582 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:37:11,583 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:37:11,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:37:11 BoogieIcfgContainer [2021-11-07 01:37:11,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:37:11,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:37:11,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:37:11,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:37:11,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:37:08" (1/3) ... [2021-11-07 01:37:11,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544d2733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:37:11, skipping insertion in model container [2021-11-07 01:37:11,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:09" (2/3) ... [2021-11-07 01:37:11,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544d2733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:37:11, skipping insertion in model container [2021-11-07 01:37:11,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:37:11" (3/3) ... [2021-11-07 01:37:11,601 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-07 01:37:11,608 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:37:11,608 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:37:11,670 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:37:11,676 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 01:37:11,676 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:37:11,697 INFO L276 IsEmpty]: Start isEmpty. Operand has 198 states, 196 states have (on average 1.7091836734693877) internal successors, (335), 197 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 01:37:11,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:37:11,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:11,707 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:11,707 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:11,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:11,713 INFO L85 PathProgramCache]: Analyzing trace with hash 312939315, now seen corresponding path program 1 times [2021-11-07 01:37:11,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:11,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146905219] [2021-11-07 01:37:11,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:11,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:12,460 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 01:37:12,461 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:12,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146905219] [2021-11-07 01:37:12,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146905219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:12,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:12,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 01:37:12,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16294163] [2021-11-07 01:37:12,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:37:12,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:12,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:37:12,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:37:12,500 INFO L87 Difference]: Start difference. First operand has 198 states, 196 states have (on average 1.7091836734693877) internal successors, (335), 197 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:12,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:12,957 INFO L93 Difference]: Finished difference Result 785 states and 1260 transitions. [2021-11-07 01:37:12,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:37:12,958 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:37:12,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:12,976 INFO L225 Difference]: With dead ends: 785 [2021-11-07 01:37:12,976 INFO L226 Difference]: Without dead ends: 672 [2021-11-07 01:37:12,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:37:12,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-11-07 01:37:13,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 662. [2021-11-07 01:37:13,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.416036308623298) internal successors, (936), 661 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 01:37:13,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 936 transitions. [2021-11-07 01:37:13,093 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 936 transitions. Word has length 82 [2021-11-07 01:37:13,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:13,094 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 936 transitions. [2021-11-07 01:37:13,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:13,094 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 936 transitions. [2021-11-07 01:37:13,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:37:13,099 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:13,099 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:13,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:37:13,100 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:13,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:13,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1772154541, now seen corresponding path program 1 times [2021-11-07 01:37:13,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:13,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671694665] [2021-11-07 01:37:13,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:13,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:13,225 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 01:37:13,225 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:13,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671694665] [2021-11-07 01:37:13,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671694665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:13,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:13,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:37:13,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638125230] [2021-11-07 01:37:13,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:37:13,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:13,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:37:13,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:37:13,229 INFO L87 Difference]: Start difference. First operand 662 states and 936 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:13,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:13,616 INFO L93 Difference]: Finished difference Result 1602 states and 2324 transitions. [2021-11-07 01:37:13,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:37:13,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:37:13,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:13,623 INFO L225 Difference]: With dead ends: 1602 [2021-11-07 01:37:13,623 INFO L226 Difference]: Without dead ends: 1060 [2021-11-07 01:37:13,626 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 01:37:13,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-11-07 01:37:13,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1058. [2021-11-07 01:37:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 1.445600756859035) internal successors, (1528), 1057 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states 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 01:37:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1528 transitions. [2021-11-07 01:37:13,721 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1528 transitions. Word has length 83 [2021-11-07 01:37:13,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:13,721 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 1528 transitions. [2021-11-07 01:37:13,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:13,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1528 transitions. [2021-11-07 01:37:13,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:37:13,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:13,724 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:13,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:37:13,724 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:13,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:13,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1160505180, now seen corresponding path program 1 times [2021-11-07 01:37:13,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:13,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965205174] [2021-11-07 01:37:13,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:13,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:13,836 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 01:37:13,836 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:13,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965205174] [2021-11-07 01:37:13,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965205174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:13,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:13,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:37:13,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895355900] [2021-11-07 01:37:13,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:37:13,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:13,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:37:13,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:37:13,839 INFO L87 Difference]: Start difference. First operand 1058 states and 1528 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:14,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:14,305 INFO L93 Difference]: Finished difference Result 2753 states and 4057 transitions. [2021-11-07 01:37:14,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:37:14,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:37:14,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:14,317 INFO L225 Difference]: With dead ends: 2753 [2021-11-07 01:37:14,318 INFO L226 Difference]: Without dead ends: 1852 [2021-11-07 01:37:14,320 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 01:37:14,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2021-11-07 01:37:14,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1850. [2021-11-07 01:37:14,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1849 states have (on average 1.4656571119524067) internal successors, (2710), 1849 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states 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 01:37:14,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 2710 transitions. [2021-11-07 01:37:14,513 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 2710 transitions. Word has length 83 [2021-11-07 01:37:14,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:14,514 INFO L470 AbstractCegarLoop]: Abstraction has 1850 states and 2710 transitions. [2021-11-07 01:37:14,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:14,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 2710 transitions. [2021-11-07 01:37:14,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:37:14,516 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:14,517 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:14,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:37:14,518 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:14,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:14,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1304619595, now seen corresponding path program 1 times [2021-11-07 01:37:14,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:14,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888912789] [2021-11-07 01:37:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:14,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:14,676 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 01:37:14,676 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:14,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888912789] [2021-11-07 01:37:14,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888912789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:14,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:14,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:37:14,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749770724] [2021-11-07 01:37:14,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:37:14,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:14,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:37:14,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:37:14,682 INFO L87 Difference]: Start difference. First operand 1850 states and 2710 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:15,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:15,221 INFO L93 Difference]: Finished difference Result 5088 states and 7558 transitions. [2021-11-07 01:37:15,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:37:15,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:37:15,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:15,246 INFO L225 Difference]: With dead ends: 5088 [2021-11-07 01:37:15,246 INFO L226 Difference]: Without dead ends: 3436 [2021-11-07 01:37:15,251 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 01:37:15,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-11-07 01:37:15,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 3434. [2021-11-07 01:37:15,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 1.476842411884649) internal successors, (5070), 3433 states have internal predecessors, (5070), 0 states have call successors, (0), 0 states 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 01:37:15,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 5070 transitions. [2021-11-07 01:37:15,587 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 5070 transitions. Word has length 83 [2021-11-07 01:37:15,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:15,588 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 5070 transitions. [2021-11-07 01:37:15,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:15,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 5070 transitions. [2021-11-07 01:37:15,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:37:15,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:15,590 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:15,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:37:15,590 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:15,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:15,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1914142782, now seen corresponding path program 1 times [2021-11-07 01:37:15,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:15,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128287753] [2021-11-07 01:37:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:15,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:15,672 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 01:37:15,672 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:15,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128287753] [2021-11-07 01:37:15,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128287753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:15,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:15,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:37:15,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566632663] [2021-11-07 01:37:15,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:37:15,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:15,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:37:15,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:37:15,675 INFO L87 Difference]: Start difference. First operand 3434 states and 5070 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:16,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:16,560 INFO L93 Difference]: Finished difference Result 9948 states and 14786 transitions. [2021-11-07 01:37:16,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:37:16,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:37:16,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:16,601 INFO L225 Difference]: With dead ends: 9948 [2021-11-07 01:37:16,601 INFO L226 Difference]: Without dead ends: 6604 [2021-11-07 01:37:16,607 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 01:37:16,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6604 states. [2021-11-07 01:37:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6604 to 6602. [2021-11-07 01:37:17,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6602 states, 6601 states have (on average 1.477048931980003) internal successors, (9750), 6601 states have internal predecessors, (9750), 0 states have call successors, (0), 0 states 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 01:37:17,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6602 states to 6602 states and 9750 transitions. [2021-11-07 01:37:17,218 INFO L78 Accepts]: Start accepts. Automaton has 6602 states and 9750 transitions. Word has length 83 [2021-11-07 01:37:17,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:17,219 INFO L470 AbstractCegarLoop]: Abstraction has 6602 states and 9750 transitions. [2021-11-07 01:37:17,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:17,220 INFO L276 IsEmpty]: Start isEmpty. Operand 6602 states and 9750 transitions. [2021-11-07 01:37:17,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:37:17,221 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:17,222 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:17,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:37:17,222 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:17,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:17,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1955259377, now seen corresponding path program 1 times [2021-11-07 01:37:17,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:17,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003622378] [2021-11-07 01:37:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:17,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:17,321 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:17,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003622378] [2021-11-07 01:37:17,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003622378] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:17,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:17,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:37:17,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567041441] [2021-11-07 01:37:17,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:37:17,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:17,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:37:17,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:37:17,324 INFO L87 Difference]: Start difference. First operand 6602 states and 9750 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:18,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:18,603 INFO L93 Difference]: Finished difference Result 19475 states and 28863 transitions. [2021-11-07 01:37:18,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:37:18,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:37:18,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:18,685 INFO L225 Difference]: With dead ends: 19475 [2021-11-07 01:37:18,686 INFO L226 Difference]: Without dead ends: 12940 [2021-11-07 01:37:18,697 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 01:37:18,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12940 states. [2021-11-07 01:37:19,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12940 to 12938. [2021-11-07 01:37:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12938 states, 12937 states have (on average 1.4707428306407977) internal successors, (19027), 12937 states have internal predecessors, (19027), 0 states have call successors, (0), 0 states 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 01:37:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12938 states to 12938 states and 19027 transitions. [2021-11-07 01:37:20,012 INFO L78 Accepts]: Start accepts. Automaton has 12938 states and 19027 transitions. Word has length 83 [2021-11-07 01:37:20,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:20,012 INFO L470 AbstractCegarLoop]: Abstraction has 12938 states and 19027 transitions. [2021-11-07 01:37:20,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:20,013 INFO L276 IsEmpty]: Start isEmpty. Operand 12938 states and 19027 transitions. [2021-11-07 01:37:20,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:37:20,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:20,015 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:20,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:37:20,015 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:20,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:20,016 INFO L85 PathProgramCache]: Analyzing trace with hash -143606304, now seen corresponding path program 1 times [2021-11-07 01:37:20,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:20,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919067972] [2021-11-07 01:37:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:20,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:20,109 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 01:37:20,109 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:20,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919067972] [2021-11-07 01:37:20,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919067972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:20,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:20,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:37:20,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518696657] [2021-11-07 01:37:20,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:37:20,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:20,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:37:20,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:37:20,112 INFO L87 Difference]: Start difference. First operand 12938 states and 19027 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:21,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:21,550 INFO L93 Difference]: Finished difference Result 36707 states and 54048 transitions. [2021-11-07 01:37:21,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:37:21,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:37:21,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:21,615 INFO L225 Difference]: With dead ends: 36707 [2021-11-07 01:37:21,616 INFO L226 Difference]: Without dead ends: 23820 [2021-11-07 01:37:21,636 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 01:37:21,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23820 states. [2021-11-07 01:37:23,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23820 to 23818. [2021-11-07 01:37:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23818 states, 23817 states have (on average 1.4591678213041106) internal successors, (34753), 23817 states have internal predecessors, (34753), 0 states have call successors, (0), 0 states 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 01:37:23,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23818 states to 23818 states and 34753 transitions. [2021-11-07 01:37:23,421 INFO L78 Accepts]: Start accepts. Automaton has 23818 states and 34753 transitions. Word has length 83 [2021-11-07 01:37:23,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:23,421 INFO L470 AbstractCegarLoop]: Abstraction has 23818 states and 34753 transitions. [2021-11-07 01:37:23,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:23,422 INFO L276 IsEmpty]: Start isEmpty. Operand 23818 states and 34753 transitions. [2021-11-07 01:37:23,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:37:23,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:23,423 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, 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 01:37:23,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:37:23,424 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:23,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1511691231, now seen corresponding path program 1 times [2021-11-07 01:37:23,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:23,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900557520] [2021-11-07 01:37:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:23,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:24,777 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 01:37:24,778 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:24,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900557520] [2021-11-07 01:37:24,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900557520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:24,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:24,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-07 01:37:24,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857558335] [2021-11-07 01:37:24,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 01:37:24,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:24,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 01:37:24,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:37:24,781 INFO L87 Difference]: Start difference. First operand 23818 states and 34753 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:28,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:28,588 INFO L93 Difference]: Finished difference Result 45931 states and 66748 transitions. [2021-11-07 01:37:28,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 01:37:28,601 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:37:28,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:28,706 INFO L225 Difference]: With dead ends: 45931 [2021-11-07 01:37:28,706 INFO L226 Difference]: Without dead ends: 36393 [2021-11-07 01:37:28,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 01:37:28,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36393 states. [2021-11-07 01:37:30,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36393 to 30429. [2021-11-07 01:37:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30429 states, 30428 states have (on average 1.4517220980675694) internal successors, (44173), 30428 states have internal predecessors, (44173), 0 states have call successors, (0), 0 states 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 01:37:31,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30429 states to 30429 states and 44173 transitions. [2021-11-07 01:37:31,030 INFO L78 Accepts]: Start accepts. Automaton has 30429 states and 44173 transitions. Word has length 84 [2021-11-07 01:37:31,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:31,031 INFO L470 AbstractCegarLoop]: Abstraction has 30429 states and 44173 transitions. [2021-11-07 01:37:31,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:31,031 INFO L276 IsEmpty]: Start isEmpty. Operand 30429 states and 44173 transitions. [2021-11-07 01:37:31,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:37:31,033 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:31,033 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, 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 01:37:31,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:37:31,034 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:31,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:31,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1894992897, now seen corresponding path program 1 times [2021-11-07 01:37:31,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:31,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084713202] [2021-11-07 01:37:31,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:31,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:32,204 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 01:37:32,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:32,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084713202] [2021-11-07 01:37:32,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084713202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:32,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:32,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-07 01:37:32,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055745271] [2021-11-07 01:37:32,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 01:37:32,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:32,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 01:37:32,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:37:32,207 INFO L87 Difference]: Start difference. First operand 30429 states and 44173 transitions. Second operand has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:36,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:36,082 INFO L93 Difference]: Finished difference Result 43642 states and 63173 transitions. [2021-11-07 01:37:36,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:37:36,083 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:37:36,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:36,171 INFO L225 Difference]: With dead ends: 43642 [2021-11-07 01:37:36,172 INFO L226 Difference]: Without dead ends: 38712 [2021-11-07 01:37:36,186 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2021-11-07 01:37:36,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38712 states. [2021-11-07 01:37:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38712 to 34994. [2021-11-07 01:37:38,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34994 states, 34993 states have (on average 1.4491469722515933) internal successors, (50710), 34993 states have internal predecessors, (50710), 0 states have call successors, (0), 0 states 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 01:37:38,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34994 states to 34994 states and 50710 transitions. [2021-11-07 01:37:38,543 INFO L78 Accepts]: Start accepts. Automaton has 34994 states and 50710 transitions. Word has length 84 [2021-11-07 01:37:38,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:38,544 INFO L470 AbstractCegarLoop]: Abstraction has 34994 states and 50710 transitions. [2021-11-07 01:37:38,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:38,544 INFO L276 IsEmpty]: Start isEmpty. Operand 34994 states and 50710 transitions. [2021-11-07 01:37:38,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:37:38,546 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:38,546 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, 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 01:37:38,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:37:38,546 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:38,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:38,547 INFO L85 PathProgramCache]: Analyzing trace with hash 931695647, now seen corresponding path program 1 times [2021-11-07 01:37:38,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:38,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291675886] [2021-11-07 01:37:38,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:38,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:39,378 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 01:37:39,378 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:39,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291675886] [2021-11-07 01:37:39,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291675886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:39,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:39,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-07 01:37:39,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881154342] [2021-11-07 01:37:39,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 01:37:39,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:39,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 01:37:39,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:37:39,381 INFO L87 Difference]: Start difference. First operand 34994 states and 50710 transitions. Second operand has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:43,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:43,734 INFO L93 Difference]: Finished difference Result 43194 states and 62407 transitions. [2021-11-07 01:37:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 01:37:43,734 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:37:43,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:43,831 INFO L225 Difference]: With dead ends: 43194 [2021-11-07 01:37:43,831 INFO L226 Difference]: Without dead ends: 43192 [2021-11-07 01:37:43,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 01:37:43,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43192 states. [2021-11-07 01:37:46,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43192 to 39877. [2021-11-07 01:37:46,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39877 states, 39876 states have (on average 1.4463587120072223) internal successors, (57675), 39876 states have internal predecessors, (57675), 0 states have call successors, (0), 0 states 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 01:37:46,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39877 states to 39877 states and 57675 transitions. [2021-11-07 01:37:46,684 INFO L78 Accepts]: Start accepts. Automaton has 39877 states and 57675 transitions. Word has length 84 [2021-11-07 01:37:46,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:46,684 INFO L470 AbstractCegarLoop]: Abstraction has 39877 states and 57675 transitions. [2021-11-07 01:37:46,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:46,685 INFO L276 IsEmpty]: Start isEmpty. Operand 39877 states and 57675 transitions. [2021-11-07 01:37:46,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:37:46,686 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:46,686 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, 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 01:37:46,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:37:46,687 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:46,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:46,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1015163839, now seen corresponding path program 1 times [2021-11-07 01:37:46,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:46,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28004182] [2021-11-07 01:37:46,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:46,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:47,666 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 01:37:47,667 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:47,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28004182] [2021-11-07 01:37:47,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28004182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:47,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:47,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-07 01:37:47,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577006283] [2021-11-07 01:37:47,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 01:37:47,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:47,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 01:37:47,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:37:47,668 INFO L87 Difference]: Start difference. First operand 39877 states and 57675 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:52,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:52,577 INFO L93 Difference]: Finished difference Result 67500 states and 97675 transitions. [2021-11-07 01:37:52,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:37:52,578 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:37:52,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:52,762 INFO L225 Difference]: With dead ends: 67500 [2021-11-07 01:37:52,762 INFO L226 Difference]: Without dead ends: 62570 [2021-11-07 01:37:52,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 01:37:52,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62570 states. [2021-11-07 01:37:56,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62570 to 48619. [2021-11-07 01:37:56,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48619 states, 48618 states have (on average 1.4439508001151837) internal successors, (70202), 48618 states have internal predecessors, (70202), 0 states have call successors, (0), 0 states 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 01:37:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48619 states to 48619 states and 70202 transitions. [2021-11-07 01:37:56,443 INFO L78 Accepts]: Start accepts. Automaton has 48619 states and 70202 transitions. Word has length 84 [2021-11-07 01:37:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:56,444 INFO L470 AbstractCegarLoop]: Abstraction has 48619 states and 70202 transitions. [2021-11-07 01:37:56,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 48619 states and 70202 transitions. [2021-11-07 01:37:56,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:37:56,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:56,446 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, 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 01:37:56,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 01:37:56,446 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:56,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:56,447 INFO L85 PathProgramCache]: Analyzing trace with hash -602702945, now seen corresponding path program 1 times [2021-11-07 01:37:56,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:56,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883541693] [2021-11-07 01:37:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:56,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:57,241 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 01:37:57,241 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:57,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883541693] [2021-11-07 01:37:57,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883541693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:57,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:57,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-07 01:37:57,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854809202] [2021-11-07 01:37:57,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 01:37:57,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:57,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 01:37:57,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:37:57,244 INFO L87 Difference]: Start difference. First operand 48619 states and 70202 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:03,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:03,866 INFO L93 Difference]: Finished difference Result 87324 states and 126307 transitions. [2021-11-07 01:38:03,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:38:03,871 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:38:03,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:03,993 INFO L225 Difference]: With dead ends: 87324 [2021-11-07 01:38:03,993 INFO L226 Difference]: Without dead ends: 82394 [2021-11-07 01:38:04,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 01:38:04,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82394 states. [2021-11-07 01:38:08,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82394 to 52626. [2021-11-07 01:38:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52626 states, 52625 states have (on average 1.4434774346793349) internal successors, (75963), 52625 states have internal predecessors, (75963), 0 states have call successors, (0), 0 states 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 01:38:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52626 states to 52626 states and 75963 transitions. [2021-11-07 01:38:08,818 INFO L78 Accepts]: Start accepts. Automaton has 52626 states and 75963 transitions. Word has length 84 [2021-11-07 01:38:08,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:08,818 INFO L470 AbstractCegarLoop]: Abstraction has 52626 states and 75963 transitions. [2021-11-07 01:38:08,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:08,818 INFO L276 IsEmpty]: Start isEmpty. Operand 52626 states and 75963 transitions. [2021-11-07 01:38:08,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:38:08,821 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:08,821 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, 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 01:38:08,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 01:38:08,821 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:08,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:08,822 INFO L85 PathProgramCache]: Analyzing trace with hash -526482561, now seen corresponding path program 1 times [2021-11-07 01:38:08,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:08,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237386632] [2021-11-07 01:38:08,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:08,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:09,665 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 01:38:09,665 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:09,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237386632] [2021-11-07 01:38:09,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237386632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:09,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:09,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-07 01:38:09,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723154604] [2021-11-07 01:38:09,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 01:38:09,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:09,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 01:38:09,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:38:09,667 INFO L87 Difference]: Start difference. First operand 52626 states and 75963 transitions. Second operand has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)