./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90076120-d75c-43c3-888a-43ce21d957b5/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90076120-d75c-43c3-888a-43ce21d957b5/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90076120-d75c-43c3-888a-43ce21d957b5/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90076120-d75c-43c3-888a-43ce21d957b5/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90076120-d75c-43c3-888a-43ce21d957b5/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90076120-d75c-43c3-888a-43ce21d957b5/bin/utaipan-eEHZpOm5b7 --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 2d43a579fead76cada979bbaf2912558c79980eef82c3d2143337dc895995c75 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:52:00,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:52:00,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:52:00,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:52:00,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:52:00,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:52:00,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:52:00,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:52:00,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:52:00,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:52:00,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:52:00,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:52:00,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:52:00,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:52:00,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:52:00,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:52:00,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:52:00,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:52:00,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:52:00,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:52:00,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:52:00,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:52:00,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:52:00,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:52:00,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:52:00,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:52:00,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:52:00,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:52:00,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:52:00,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:52:00,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:52:00,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:52:00,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:52:00,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:52:00,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:52:00,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:52:00,636 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:52:00,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:52:00,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:52:00,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:52:00,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:52:00,639 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90076120-d75c-43c3-888a-43ce21d957b5/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:52:00,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:52:00,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:52:00,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:52:00,679 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:52:00,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:52:00,686 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:52:00,686 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:52:00,687 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:52:00,687 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:52:00,687 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:52:00,688 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:52:00,688 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:52:00,688 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:52:00,689 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:52:00,689 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:52:00,689 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:52:00,689 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:52:00,689 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:52:00,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:52:00,691 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:52:00,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:52:00,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:52:00,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:52:00,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:52:00,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:52:00,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:52:00,693 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:52:00,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:52:00,694 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:52:00,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:52:00,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:52:00,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:52:00,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:52:00,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:52:00,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:52:00,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:52:00,695 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:52:00,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:52:00,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:52:00,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:52:00,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:52:00,696 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_90076120-d75c-43c3-888a-43ce21d957b5/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90076120-d75c-43c3-888a-43ce21d957b5/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d43a579fead76cada979bbaf2912558c79980eef82c3d2143337dc895995c75 [2021-11-25 19:52:01,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:52:01,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:52:01,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:52:01,042 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:52:01,043 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:52:01,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90076120-d75c-43c3-888a-43ce21d957b5/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-25 19:52:01,119 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90076120-d75c-43c3-888a-43ce21d957b5/bin/utaipan-eEHZpOm5b7/data/da70e9825/170946af873c4b40947d88aaa457ad6b/FLAG2ae0a93bb [2021-11-25 19:52:02,180 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:52:02,181 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90076120-d75c-43c3-888a-43ce21d957b5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-25 19:52:02,235 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90076120-d75c-43c3-888a-43ce21d957b5/bin/utaipan-eEHZpOm5b7/data/da70e9825/170946af873c4b40947d88aaa457ad6b/FLAG2ae0a93bb [2021-11-25 19:52:02,501 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90076120-d75c-43c3-888a-43ce21d957b5/bin/utaipan-eEHZpOm5b7/data/da70e9825/170946af873c4b40947d88aaa457ad6b [2021-11-25 19:52:02,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:52:02,506 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:52:02,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:52:02,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:52:02,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:52:02,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:52:02" (1/1) ... [2021-11-25 19:52:02,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4e2717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:02, skipping insertion in model container [2021-11-25 19:52:02,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:52:02" (1/1) ... [2021-11-25 19:52:02,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:52:02,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:52:03,510 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90076120-d75c-43c3-888a-43ce21d957b5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[19354,19367] [2021-11-25 19:52:04,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:52:04,961 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:52:05,076 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90076120-d75c-43c3-888a-43ce21d957b5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[19354,19367] [2021-11-25 19:52:06,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:52:06,276 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:52:06,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:06 WrapperNode [2021-11-25 19:52:06,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:52:06,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:52:06,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:52:06,278 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:52:06,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:06" (1/1) ... [2021-11-25 19:52:06,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:06" (1/1) ... [2021-11-25 19:52:06,687 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18587 [2021-11-25 19:52:06,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:52:06,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:52:06,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:52:06,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:52:06,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:06" (1/1) ... [2021-11-25 19:52:06,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:06" (1/1) ... [2021-11-25 19:52:06,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:06" (1/1) ... [2021-11-25 19:52:06,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:06" (1/1) ... [2021-11-25 19:52:06,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:06" (1/1) ... [2021-11-25 19:52:07,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:06" (1/1) ... [2021-11-25 19:52:07,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:06" (1/1) ... [2021-11-25 19:52:07,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:52:07,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:52:07,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:52:07,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:52:07,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:06" (1/1) ... [2021-11-25 19:52:07,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:52:07,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90076120-d75c-43c3-888a-43ce21d957b5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:52:07,185 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90076120-d75c-43c3-888a-43ce21d957b5/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:52:07,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90076120-d75c-43c3-888a-43ce21d957b5/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:52:07,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:52:07,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:52:07,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:52:07,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:52:07,825 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:52:07,826 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:52:14,814 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:52:15,638 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:52:15,639 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 19:52:15,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:52:15 BoogieIcfgContainer [2021-11-25 19:52:15,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:52:15,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:52:15,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:52:15,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:52:15,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:52:02" (1/3) ... [2021-11-25 19:52:15,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@289f7581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:52:15, skipping insertion in model container [2021-11-25 19:52:15,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:06" (2/3) ... [2021-11-25 19:52:15,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@289f7581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:52:15, skipping insertion in model container [2021-11-25 19:52:15,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:52:15" (3/3) ... [2021-11-25 19:52:15,656 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-25 19:52:15,662 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:52:15,662 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:52:15,732 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:52:15,740 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 [2021-11-25 19:52:15,740 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:52:15,807 INFO L276 IsEmpty]: Start isEmpty. Operand has 2815 states, 2813 states have (on average 1.911837895485247) internal successors, (5378), 2814 states have internal predecessors, (5378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:15,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 19:52:15,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:15,845 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:15,846 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:52:15,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:15,851 INFO L85 PathProgramCache]: Analyzing trace with hash -238592942, now seen corresponding path program 1 times [2021-11-25 19:52:15,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:52:15,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727821741] [2021-11-25 19:52:15,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:15,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:52:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:16,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:16,451 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:52:16,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727821741] [2021-11-25 19:52:16,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727821741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:52:16,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:52:16,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:52:16,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64617855] [2021-11-25 19:52:16,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:52:16,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:52:16,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:52:16,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:52:16,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:52:16,493 INFO L87 Difference]: Start difference. First operand has 2815 states, 2813 states have (on average 1.911837895485247) internal successors, (5378), 2814 states have internal predecessors, (5378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:16,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:16,929 INFO L93 Difference]: Finished difference Result 3245 states and 6093 transitions. [2021-11-25 19:52:16,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:52:16,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-25 19:52:16,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:17,003 INFO L225 Difference]: With dead ends: 3245 [2021-11-25 19:52:17,003 INFO L226 Difference]: Without dead ends: 3028 [2021-11-25 19:52:17,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:52:17,034 INFO L933 BasicCegarLoop]: 5375 mSDtfsCounter, 2633 mSDsluCounter, 2998 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2633 SdHoareTripleChecker+Valid, 8363 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:17,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2633 Valid, 8363 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:52:17,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-11-25 19:52:17,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 3026. [2021-11-25 19:52:17,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3026 states, 3025 states have (on average 1.2730578512396695) internal successors, (3851), 3025 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 3851 transitions. [2021-11-25 19:52:17,230 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 3851 transitions. Word has length 77 [2021-11-25 19:52:17,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:17,231 INFO L470 AbstractCegarLoop]: Abstraction has 3026 states and 3851 transitions. [2021-11-25 19:52:17,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:17,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 3851 transitions. [2021-11-25 19:52:17,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 19:52:17,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:17,241 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:17,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:52:17,242 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:52:17,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:17,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1129198258, now seen corresponding path program 1 times [2021-11-25 19:52:17,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:52:17,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502864892] [2021-11-25 19:52:17,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:17,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:52:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:17,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:52:17,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502864892] [2021-11-25 19:52:17,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502864892] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:52:17,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:52:17,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:52:17,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660254789] [2021-11-25 19:52:17,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:52:17,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:52:17,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:52:17,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:52:17,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:52:17,491 INFO L87 Difference]: Start difference. First operand 3026 states and 3851 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:18,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:18,916 INFO L93 Difference]: Finished difference Result 4621 states and 5988 transitions. [2021-11-25 19:52:18,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:52:18,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-25 19:52:18,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:18,934 INFO L225 Difference]: With dead ends: 4621 [2021-11-25 19:52:18,935 INFO L226 Difference]: Without dead ends: 2529 [2021-11-25 19:52:18,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:52:18,947 INFO L933 BasicCegarLoop]: 1540 mSDtfsCounter, 8035 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8035 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:18,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8035 Valid, 1704 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-25 19:52:18,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2021-11-25 19:52:19,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 2527. [2021-11-25 19:52:19,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2527 states, 2526 states have (on average 1.2984956452889944) internal successors, (3280), 2526 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2527 states to 2527 states and 3280 transitions. [2021-11-25 19:52:19,113 INFO L78 Accepts]: Start accepts. Automaton has 2527 states and 3280 transitions. Word has length 77 [2021-11-25 19:52:19,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:19,114 INFO L470 AbstractCegarLoop]: Abstraction has 2527 states and 3280 transitions. [2021-11-25 19:52:19,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2527 states and 3280 transitions. [2021-11-25 19:52:19,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 19:52:19,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:19,122 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:19,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:52:19,123 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:52:19,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:19,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1837517492, now seen corresponding path program 1 times [2021-11-25 19:52:19,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:52:19,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408771411] [2021-11-25 19:52:19,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:19,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:52:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:19,238 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:52:19,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408771411] [2021-11-25 19:52:19,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408771411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:52:19,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:52:19,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:52:19,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258163432] [2021-11-25 19:52:19,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:52:19,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:52:19,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:52:19,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:52:19,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:52:19,241 INFO L87 Difference]: Start difference. First operand 2527 states and 3280 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:19,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:19,438 INFO L93 Difference]: Finished difference Result 4340 states and 5743 transitions. [2021-11-25 19:52:19,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:52:19,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-25 19:52:19,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:19,460 INFO L225 Difference]: With dead ends: 4340 [2021-11-25 19:52:19,461 INFO L226 Difference]: Without dead ends: 3784 [2021-11-25 19:52:19,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:52:19,471 INFO L933 BasicCegarLoop]: 3538 mSDtfsCounter, 2271 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2271 SdHoareTripleChecker+Valid, 5027 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:19,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2271 Valid, 5027 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:52:19,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3784 states. [2021-11-25 19:52:19,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3784 to 3782. [2021-11-25 19:52:19,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3782 states, 3781 states have (on average 1.3009785770960063) internal successors, (4919), 3781 states have internal predecessors, (4919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3782 states to 3782 states and 4919 transitions. [2021-11-25 19:52:19,610 INFO L78 Accepts]: Start accepts. Automaton has 3782 states and 4919 transitions. Word has length 78 [2021-11-25 19:52:19,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:19,612 INFO L470 AbstractCegarLoop]: Abstraction has 3782 states and 4919 transitions. [2021-11-25 19:52:19,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:19,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3782 states and 4919 transitions. [2021-11-25 19:52:19,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 19:52:19,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:19,622 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:19,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:52:19,623 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:52:19,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:19,624 INFO L85 PathProgramCache]: Analyzing trace with hash -618269756, now seen corresponding path program 1 times [2021-11-25 19:52:19,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:52:19,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500337216] [2021-11-25 19:52:19,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:19,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:52:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:19,827 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:52:19,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500337216] [2021-11-25 19:52:19,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500337216] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:52:19,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:52:19,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:52:19,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9409975] [2021-11-25 19:52:19,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:52:19,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:52:19,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:52:19,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:52:19,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:52:19,831 INFO L87 Difference]: Start difference. First operand 3782 states and 4919 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:21,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:21,297 INFO L93 Difference]: Finished difference Result 6060 states and 7995 transitions. [2021-11-25 19:52:21,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:52:21,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-25 19:52:21,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:21,320 INFO L225 Difference]: With dead ends: 6060 [2021-11-25 19:52:21,320 INFO L226 Difference]: Without dead ends: 4058 [2021-11-25 19:52:21,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:52:21,333 INFO L933 BasicCegarLoop]: 1233 mSDtfsCounter, 6698 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6698 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:21,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6698 Valid, 1344 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 19:52:21,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-11-25 19:52:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 4056. [2021-11-25 19:52:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4056 states, 4055 states have (on average 1.2816276202219483) internal successors, (5197), 4055 states have internal predecessors, (5197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:21,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4056 states to 4056 states and 5197 transitions. [2021-11-25 19:52:21,627 INFO L78 Accepts]: Start accepts. Automaton has 4056 states and 5197 transitions. Word has length 78 [2021-11-25 19:52:21,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:21,627 INFO L470 AbstractCegarLoop]: Abstraction has 4056 states and 5197 transitions. [2021-11-25 19:52:21,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:21,628 INFO L276 IsEmpty]: Start isEmpty. Operand 4056 states and 5197 transitions. [2021-11-25 19:52:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 19:52:21,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:21,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:21,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:52:21,636 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:52:21,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:21,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1256480666, now seen corresponding path program 1 times [2021-11-25 19:52:21,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:52:21,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034283625] [2021-11-25 19:52:21,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:21,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:52:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:21,779 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:52:21,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034283625] [2021-11-25 19:52:21,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034283625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:52:21,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:52:21,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:52:21,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097492989] [2021-11-25 19:52:21,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:52:21,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:52:21,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:52:21,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:52:21,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:52:21,782 INFO L87 Difference]: Start difference. First operand 4056 states and 5197 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:22,227 INFO L93 Difference]: Finished difference Result 6702 states and 9017 transitions. [2021-11-25 19:52:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:52:22,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-25 19:52:22,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:22,254 INFO L225 Difference]: With dead ends: 6702 [2021-11-25 19:52:22,254 INFO L226 Difference]: Without dead ends: 5475 [2021-11-25 19:52:22,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:52:22,259 INFO L933 BasicCegarLoop]: 2171 mSDtfsCounter, 1115 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 3385 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:22,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1115 Valid, 3385 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:52:22,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5475 states. [2021-11-25 19:52:22,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5475 to 5473. [2021-11-25 19:52:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5473 states, 5472 states have (on average 1.3154239766081872) internal successors, (7198), 5472 states have internal predecessors, (7198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5473 states to 5473 states and 7198 transitions. [2021-11-25 19:52:22,519 INFO L78 Accepts]: Start accepts. Automaton has 5473 states and 7198 transitions. Word has length 78 [2021-11-25 19:52:22,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:22,522 INFO L470 AbstractCegarLoop]: Abstraction has 5473 states and 7198 transitions. [2021-11-25 19:52:22,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:22,523 INFO L276 IsEmpty]: Start isEmpty. Operand 5473 states and 7198 transitions. [2021-11-25 19:52:22,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 19:52:22,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:22,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:22,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:52:22,544 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:52:22,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:22,545 INFO L85 PathProgramCache]: Analyzing trace with hash -373138448, now seen corresponding path program 1 times [2021-11-25 19:52:22,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:52:22,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176421950] [2021-11-25 19:52:22,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:22,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:52:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:22,677 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:52:22,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176421950] [2021-11-25 19:52:22,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176421950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:52:22,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:52:22,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:52:22,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214146199] [2021-11-25 19:52:22,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:52:22,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:52:22,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:52:22,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:52:22,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:52:22,680 INFO L87 Difference]: Start difference. First operand 5473 states and 7198 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:23,940 INFO L93 Difference]: Finished difference Result 12026 states and 16334 transitions. [2021-11-25 19:52:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:52:23,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-25 19:52:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:24,000 INFO L225 Difference]: With dead ends: 12026 [2021-11-25 19:52:24,000 INFO L226 Difference]: Without dead ends: 7318 [2021-11-25 19:52:24,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:52:24,013 INFO L933 BasicCegarLoop]: 1015 mSDtfsCounter, 5232 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5232 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:24,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5232 Valid, 1182 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 19:52:24,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7318 states. [2021-11-25 19:52:24,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7318 to 7316. [2021-11-25 19:52:24,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7316 states, 7315 states have (on average 1.361038961038961) internal successors, (9956), 7315 states have internal predecessors, (9956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7316 states to 7316 states and 9956 transitions. [2021-11-25 19:52:24,491 INFO L78 Accepts]: Start accepts. Automaton has 7316 states and 9956 transitions. Word has length 78 [2021-11-25 19:52:24,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:24,491 INFO L470 AbstractCegarLoop]: Abstraction has 7316 states and 9956 transitions. [2021-11-25 19:52:24,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:24,492 INFO L276 IsEmpty]: Start isEmpty. Operand 7316 states and 9956 transitions. [2021-11-25 19:52:24,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-25 19:52:24,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:24,504 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:24,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:52:24,504 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:52:24,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:24,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1730654079, now seen corresponding path program 1 times [2021-11-25 19:52:24,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:52:24,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35552892] [2021-11-25 19:52:24,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:24,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:52:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:24,608 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:52:24,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35552892] [2021-11-25 19:52:24,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35552892] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:52:24,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:52:24,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:52:24,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541582662] [2021-11-25 19:52:24,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:52:24,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:52:24,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:52:24,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:52:24,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:52:24,611 INFO L87 Difference]: Start difference. First operand 7316 states and 9956 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:25,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:25,282 INFO L93 Difference]: Finished difference Result 18409 states and 25446 transitions. [2021-11-25 19:52:25,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:52:25,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-25 19:52:25,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:25,311 INFO L225 Difference]: With dead ends: 18409 [2021-11-25 19:52:25,311 INFO L226 Difference]: Without dead ends: 12622 [2021-11-25 19:52:25,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:52:25,322 INFO L933 BasicCegarLoop]: 2197 mSDtfsCounter, 1413 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 3210 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:25,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1413 Valid, 3210 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:52:25,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12622 states. [2021-11-25 19:52:25,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12622 to 12620. [2021-11-25 19:52:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12620 states, 12619 states have (on average 1.3630240114113639) internal successors, (17200), 12619 states have internal predecessors, (17200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:25,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12620 states to 12620 states and 17200 transitions. [2021-11-25 19:52:25,959 INFO L78 Accepts]: Start accepts. Automaton has 12620 states and 17200 transitions. Word has length 79 [2021-11-25 19:52:25,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:25,960 INFO L470 AbstractCegarLoop]: Abstraction has 12620 states and 17200 transitions. [2021-11-25 19:52:25,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:25,960 INFO L276 IsEmpty]: Start isEmpty. Operand 12620 states and 17200 transitions. [2021-11-25 19:52:25,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-25 19:52:25,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:25,977 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:25,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:52:25,978 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:52:25,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:25,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1253382368, now seen corresponding path program 1 times [2021-11-25 19:52:25,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:52:25,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767741807] [2021-11-25 19:52:25,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:25,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:52:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:26,129 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:52:26,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767741807] [2021-11-25 19:52:26,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767741807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:52:26,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:52:26,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:52:26,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117459333] [2021-11-25 19:52:26,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:52:26,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:52:26,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:52:26,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:52:26,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:52:26,131 INFO L87 Difference]: Start difference. First operand 12620 states and 17200 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:27,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:27,589 INFO L93 Difference]: Finished difference Result 32151 states and 44543 transitions. [2021-11-25 19:52:27,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:52:27,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-25 19:52:27,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:27,635 INFO L225 Difference]: With dead ends: 32151 [2021-11-25 19:52:27,635 INFO L226 Difference]: Without dead ends: 20313 [2021-11-25 19:52:27,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:52:27,657 INFO L933 BasicCegarLoop]: 766 mSDtfsCounter, 4103 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4103 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:27,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4103 Valid, 934 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:52:27,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20313 states. [2021-11-25 19:52:28,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20313 to 20311. [2021-11-25 19:52:28,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20311 states, 20310 states have (on average 1.378138847858198) internal successors, (27990), 20310 states have internal predecessors, (27990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20311 states to 20311 states and 27990 transitions. [2021-11-25 19:52:28,484 INFO L78 Accepts]: Start accepts. Automaton has 20311 states and 27990 transitions. Word has length 79 [2021-11-25 19:52:28,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:28,484 INFO L470 AbstractCegarLoop]: Abstraction has 20311 states and 27990 transitions. [2021-11-25 19:52:28,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:28,485 INFO L276 IsEmpty]: Start isEmpty. Operand 20311 states and 27990 transitions. [2021-11-25 19:52:28,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-25 19:52:28,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:28,500 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:28,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 19:52:28,500 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:52:28,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:28,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1054519687, now seen corresponding path program 1 times [2021-11-25 19:52:28,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:52:28,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597607386] [2021-11-25 19:52:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:28,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:52:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:28,665 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:52:28,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597607386] [2021-11-25 19:52:28,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597607386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:52:28,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:52:28,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:52:28,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303973558] [2021-11-25 19:52:28,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:52:28,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:52:28,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:52:28,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:52:28,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:52:28,668 INFO L87 Difference]: Start difference. First operand 20311 states and 27990 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:30,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:30,224 INFO L93 Difference]: Finished difference Result 50338 states and 70053 transitions. [2021-11-25 19:52:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:52:30,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-11-25 19:52:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:30,297 INFO L225 Difference]: With dead ends: 50338 [2021-11-25 19:52:30,298 INFO L226 Difference]: Without dead ends: 33795 [2021-11-25 19:52:30,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:52:30,320 INFO L933 BasicCegarLoop]: 1620 mSDtfsCounter, 1024 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 2446 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:30,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1024 Valid, 2446 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:52:30,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33795 states. [2021-11-25 19:52:31,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33795 to 33793. [2021-11-25 19:52:31,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33793 states, 33792 states have (on average 1.3756214488636365) internal successors, (46485), 33792 states have internal predecessors, (46485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:31,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33793 states to 33793 states and 46485 transitions. [2021-11-25 19:52:31,774 INFO L78 Accepts]: Start accepts. Automaton has 33793 states and 46485 transitions. Word has length 80 [2021-11-25 19:52:31,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:31,775 INFO L470 AbstractCegarLoop]: Abstraction has 33793 states and 46485 transitions. [2021-11-25 19:52:31,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:31,775 INFO L276 IsEmpty]: Start isEmpty. Operand 33793 states and 46485 transitions. [2021-11-25 19:52:31,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-25 19:52:31,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:31,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:31,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 19:52:31,797 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:52:31,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:31,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1231479032, now seen corresponding path program 1 times [2021-11-25 19:52:31,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:52:31,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941435437] [2021-11-25 19:52:31,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:31,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:52:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:31,924 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:52:31,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941435437] [2021-11-25 19:52:31,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941435437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:52:31,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:52:31,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:52:31,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798364233] [2021-11-25 19:52:31,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:52:31,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:52:31,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:52:31,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:52:31,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:52:31,927 INFO L87 Difference]: Start difference. First operand 33793 states and 46485 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:35,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:35,366 INFO L93 Difference]: Finished difference Result 91056 states and 126266 transitions. [2021-11-25 19:52:35,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:52:35,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-25 19:52:35,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:35,466 INFO L225 Difference]: With dead ends: 91056 [2021-11-25 19:52:35,467 INFO L226 Difference]: Without dead ends: 58534 [2021-11-25 19:52:35,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:52:35,513 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 3510 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3510 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:35,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3510 Valid, 765 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:52:35,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58534 states. [2021-11-25 19:52:38,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58534 to 58532. [2021-11-25 19:52:38,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58532 states, 58531 states have (on average 1.3792178503698895) internal successors, (80727), 58531 states have internal predecessors, (80727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:38,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58532 states to 58532 states and 80727 transitions. [2021-11-25 19:52:38,870 INFO L78 Accepts]: Start accepts. Automaton has 58532 states and 80727 transitions. Word has length 81 [2021-11-25 19:52:38,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:38,870 INFO L470 AbstractCegarLoop]: Abstraction has 58532 states and 80727 transitions. [2021-11-25 19:52:38,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:38,870 INFO L276 IsEmpty]: Start isEmpty. Operand 58532 states and 80727 transitions. [2021-11-25 19:52:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 19:52:38,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:38,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:38,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 19:52:38,895 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:52:38,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:38,896 INFO L85 PathProgramCache]: Analyzing trace with hash -611340285, now seen corresponding path program 1 times [2021-11-25 19:52:38,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:52:38,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500716309] [2021-11-25 19:52:38,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:38,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:52:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:39,030 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:52:39,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500716309] [2021-11-25 19:52:39,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500716309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:52:39,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:52:39,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:52:39,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179596099] [2021-11-25 19:52:39,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:52:39,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:52:39,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:52:39,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:52:39,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:52:39,032 INFO L87 Difference]: Start difference. First operand 58532 states and 80727 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:52:55,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:55,996 INFO L93 Difference]: Finished difference Result 299566 states and 417522 transitions. [2021-11-25 19:52:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:52:55,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-25 19:52:55,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:56,544 INFO L225 Difference]: With dead ends: 299566 [2021-11-25 19:52:56,545 INFO L226 Difference]: Without dead ends: 274164 [2021-11-25 19:52:56,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:52:56,635 INFO L933 BasicCegarLoop]: 637 mSDtfsCounter, 5682 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5682 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:56,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5682 Valid, 1601 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 19:52:56,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274164 states.