./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-1.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_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/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_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/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_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/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 446a871a3cd47ea45eeb885eff35eb33cc93ddc5fa339490f1703fb03f5dc129 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:28:21,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:28:21,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:28:21,679 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:28:21,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:28:21,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:28:21,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:28:21,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:28:21,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:28:21,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:28:21,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:28:21,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:28:21,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:28:21,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:28:21,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:28:21,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:28:21,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:28:21,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:28:21,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:28:21,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:28:21,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:28:21,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:28:21,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:28:21,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:28:21,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:28:21,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:28:21,756 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:28:21,757 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:28:21,769 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:28:21,770 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:28:21,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:28:21,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:28:21,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:28:21,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:28:21,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:28:21,775 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:28:21,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:28:21,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:28:21,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:28:21,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:28:21,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:28:21,780 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:28:21,820 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:28:21,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:28:21,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:28:21,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:28:21,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:28:21,822 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:28:21,822 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:28:21,823 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:28:21,823 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:28:21,823 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:28:21,823 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:28:21,824 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:28:21,824 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:28:21,824 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:28:21,824 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:28:21,825 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:28:21,825 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:28:21,825 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:28:21,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:28:21,826 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:28:21,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:28:21,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:28:21,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:28:21,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:28:21,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:28:21,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:28:21,828 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:28:21,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:28:21,829 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:28:21,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:28:21,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:28:21,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:28:21,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:28:21,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:28:21,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:28:21,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:28:21,831 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:28:21,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:28:21,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:28:21,832 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:28:21,832 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:28:21,832 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_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 446a871a3cd47ea45eeb885eff35eb33cc93ddc5fa339490f1703fb03f5dc129 [2021-11-25 19:28:22,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:28:22,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:28:22,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:28:22,271 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:28:22,272 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:28:22,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-1.c [2021-11-25 19:28:22,375 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/data/bb7fc96c2/7c7d87e16da143be90eb63792faa131b/FLAG4d8d0c670 [2021-11-25 19:28:23,484 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:28:23,485 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-1.c [2021-11-25 19:28:23,553 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/data/bb7fc96c2/7c7d87e16da143be90eb63792faa131b/FLAG4d8d0c670 [2021-11-25 19:28:23,719 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/data/bb7fc96c2/7c7d87e16da143be90eb63792faa131b [2021-11-25 19:28:23,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:28:23,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:28:23,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:28:23,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:28:23,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:28:23,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:28:23" (1/1) ... [2021-11-25 19:28:23,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71399766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:28:23, skipping insertion in model container [2021-11-25 19:28:23,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:28:23" (1/1) ... [2021-11-25 19:28:23,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:28:24,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:28:26,753 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_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-1.c[380593,380606] [2021-11-25 19:28:26,805 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_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-1.c[383339,383352] [2021-11-25 19:28:27,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:28:27,126 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:28:28,656 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_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-1.c[380593,380606] [2021-11-25 19:28:28,674 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_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-1.c[383339,383352] [2021-11-25 19:28:28,697 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:28:28,781 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:28:28,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:28:28 WrapperNode [2021-11-25 19:28:28,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:28:28,783 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:28:28,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:28:28,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:28:28,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:28:28" (1/1) ... [2021-11-25 19:28:28,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:28:28" (1/1) ... [2021-11-25 19:28:29,561 INFO L137 Inliner]: procedures = 56, calls = 60, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 12856 [2021-11-25 19:28:29,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:28:29,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:28:29,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:28:29,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:28:29,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:28:28" (1/1) ... [2021-11-25 19:28:29,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:28:28" (1/1) ... [2021-11-25 19:28:29,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:28:28" (1/1) ... [2021-11-25 19:28:29,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:28:28" (1/1) ... [2021-11-25 19:28:30,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:28:28" (1/1) ... [2021-11-25 19:28:30,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:28:28" (1/1) ... [2021-11-25 19:28:30,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:28:28" (1/1) ... [2021-11-25 19:28:30,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:28:30,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:28:30,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:28:30,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:28:30,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:28:28" (1/1) ... [2021-11-25 19:28:30,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:28:30,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:28:30,231 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:28:30,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:28:30,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:28:30,281 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-25 19:28:30,281 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-25 19:28:30,281 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-25 19:28:30,281 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-25 19:28:30,281 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-25 19:28:30,281 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-25 19:28:30,282 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-25 19:28:30,282 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-25 19:28:30,282 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-25 19:28:30,282 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-25 19:28:30,282 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-25 19:28:30,282 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-25 19:28:30,283 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-25 19:28:30,283 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-25 19:28:30,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:28:30,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:28:30,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:28:30,422 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:28:30,424 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:28:38,146 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:28:40,787 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:28:40,787 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-25 19:28:40,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:28:40 BoogieIcfgContainer [2021-11-25 19:28:40,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:28:40,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:28:40,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:28:40,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:28:40,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:28:23" (1/3) ... [2021-11-25 19:28:40,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545d1ccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:28:40, skipping insertion in model container [2021-11-25 19:28:40,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:28:28" (2/3) ... [2021-11-25 19:28:40,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545d1ccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:28:40, skipping insertion in model container [2021-11-25 19:28:40,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:28:40" (3/3) ... [2021-11-25 19:28:40,805 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.06.cil-1.c [2021-11-25 19:28:40,815 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:28:40,815 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 19:28:40,898 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:28:40,907 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 19:28:40,908 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 19:28:40,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 1771 states, 1739 states have (on average 1.968372627947096) internal successors, (3423), 1744 states have internal predecessors, (3423), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-25 19:28:41,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 19:28:41,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:28:41,013 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] [2021-11-25 19:28:41,014 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:28:41,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:28:41,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1415769424, now seen corresponding path program 1 times [2021-11-25 19:28:41,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:28:41,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495792682] [2021-11-25 19:28:41,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:41,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:28:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:41,526 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 19:28:41,526 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:28:41,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495792682] [2021-11-25 19:28:41,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495792682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:28:41,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:28:41,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:28:41,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431122322] [2021-11-25 19:28:41,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:28:41,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:28:41,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:28:41,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:28:41,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:28:41,588 INFO L87 Difference]: Start difference. First operand has 1771 states, 1739 states have (on average 1.968372627947096) internal successors, (3423), 1744 states have internal predecessors, (3423), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:28:42,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:28:42,746 INFO L93 Difference]: Finished difference Result 3646 states and 7111 transitions. [2021-11-25 19:28:42,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:28:42,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2021-11-25 19:28:42,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:28:42,787 INFO L225 Difference]: With dead ends: 3646 [2021-11-25 19:28:42,787 INFO L226 Difference]: Without dead ends: 1874 [2021-11-25 19:28:42,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:28:42,809 INFO L933 BasicCegarLoop]: 3338 mSDtfsCounter, 3589 mSDsluCounter, 3535 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3589 SdHoareTripleChecker+Valid, 6600 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:28:42,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3589 Valid, 6600 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 19:28:42,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-11-25 19:28:43,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1873. [2021-11-25 19:28:43,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1821 states have (on average 1.9406919275123558) internal successors, (3534), 1825 states have internal predecessors, (3534), 38 states have call successors, (38), 13 states have call predecessors, (38), 12 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-25 19:28:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3608 transitions. [2021-11-25 19:28:43,041 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3608 transitions. Word has length 50 [2021-11-25 19:28:43,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:28:43,042 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3608 transitions. [2021-11-25 19:28:43,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:28:43,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3608 transitions. [2021-11-25 19:28:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 19:28:43,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:28:43,059 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:28:43,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:28:43,060 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:28:43,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:28:43,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1378952097, now seen corresponding path program 1 times [2021-11-25 19:28:43,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:28:43,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326823626] [2021-11-25 19:28:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:43,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:28:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 19:28:43,249 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:28:43,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326823626] [2021-11-25 19:28:43,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326823626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:28:43,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249564373] [2021-11-25 19:28:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:43,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:43,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:28:43,255 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:28:43,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:28:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:43,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:28:43,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:28:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 19:28:43,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:28:43,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249564373] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:28:43,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:28:43,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 19:28:43,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189027421] [2021-11-25 19:28:43,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:28:43,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:28:43,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:28:43,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:28:43,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:28:43,680 INFO L87 Difference]: Start difference. First operand 1873 states and 3608 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:28:44,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:28:44,199 INFO L93 Difference]: Finished difference Result 2320 states and 4279 transitions. [2021-11-25 19:28:44,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:28:44,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2021-11-25 19:28:44,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:28:44,226 INFO L225 Difference]: With dead ends: 2320 [2021-11-25 19:28:44,226 INFO L226 Difference]: Without dead ends: 2093 [2021-11-25 19:28:44,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:28:44,230 INFO L933 BasicCegarLoop]: 3255 mSDtfsCounter, 3419 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3419 SdHoareTripleChecker+Valid, 3397 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:28:44,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3419 Valid, 3397 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:28:44,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-11-25 19:28:44,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2087. [2021-11-25 19:28:44,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 1993 states have (on average 1.8991470145509282) internal successors, (3785), 1998 states have internal predecessors, (3785), 68 states have call successors, (68), 25 states have call predecessors, (68), 24 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2021-11-25 19:28:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 3919 transitions. [2021-11-25 19:28:44,365 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 3919 transitions. Word has length 95 [2021-11-25 19:28:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:28:44,366 INFO L470 AbstractCegarLoop]: Abstraction has 2087 states and 3919 transitions. [2021-11-25 19:28:44,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:28:44,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 3919 transitions. [2021-11-25 19:28:44,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 19:28:44,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:28:44,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:28:44,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:28:44,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:44,598 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:28:44,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:28:44,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1835530559, now seen corresponding path program 1 times [2021-11-25 19:28:44,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:28:44,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895412161] [2021-11-25 19:28:44,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:44,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:28:44,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 19:28:44,706 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:28:44,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895412161] [2021-11-25 19:28:44,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895412161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:28:44,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394599890] [2021-11-25 19:28:44,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:44,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:44,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:28:44,708 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:28:44,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:28:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:44,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:28:44,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:28:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 19:28:45,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:28:45,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394599890] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:28:45,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:28:45,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 19:28:45,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322704520] [2021-11-25 19:28:45,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:28:45,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:28:45,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:28:45,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:28:45,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:28:45,028 INFO L87 Difference]: Start difference. First operand 2087 states and 3919 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:28:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:28:45,509 INFO L93 Difference]: Finished difference Result 2956 states and 5218 transitions. [2021-11-25 19:28:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:28:45,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2021-11-25 19:28:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:28:45,530 INFO L225 Difference]: With dead ends: 2956 [2021-11-25 19:28:45,530 INFO L226 Difference]: Without dead ends: 2515 [2021-11-25 19:28:45,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:28:45,534 INFO L933 BasicCegarLoop]: 3254 mSDtfsCounter, 3428 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3428 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:28:45,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3428 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:28:45,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-11-25 19:28:45,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2507. [2021-11-25 19:28:45,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 2331 states have (on average 1.833976833976834) internal successors, (4275), 2338 states have internal predecessors, (4275), 126 states have call successors, (126), 49 states have call predecessors, (126), 48 states have return successors, (124), 120 states have call predecessors, (124), 124 states have call successors, (124) [2021-11-25 19:28:45,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 4525 transitions. [2021-11-25 19:28:45,653 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 4525 transitions. Word has length 95 [2021-11-25 19:28:45,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:28:45,654 INFO L470 AbstractCegarLoop]: Abstraction has 2507 states and 4525 transitions. [2021-11-25 19:28:45,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:28:45,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 4525 transitions. [2021-11-25 19:28:45,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 19:28:45,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:28:45,660 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:28:45,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:28:45,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-25 19:28:45,886 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:28:45,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:28:45,887 INFO L85 PathProgramCache]: Analyzing trace with hash 225355681, now seen corresponding path program 1 times [2021-11-25 19:28:45,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:28:45,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717353293] [2021-11-25 19:28:45,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:45,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:28:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 19:28:46,020 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:28:46,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717353293] [2021-11-25 19:28:46,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717353293] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:28:46,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386954068] [2021-11-25 19:28:46,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:46,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:46,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:28:46,026 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:28:46,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:28:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:46,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:28:46,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:28:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 19:28:46,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:28:46,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386954068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:28:46,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:28:46,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 19:28:46,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283639807] [2021-11-25 19:28:46,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:28:46,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:28:46,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:28:46,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:28:46,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:28:46,462 INFO L87 Difference]: Start difference. First operand 2507 states and 4525 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:28:46,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:28:46,937 INFO L93 Difference]: Finished difference Result 4204 states and 7046 transitions. [2021-11-25 19:28:46,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:28:46,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2021-11-25 19:28:46,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:28:46,961 INFO L225 Difference]: With dead ends: 4204 [2021-11-25 19:28:46,961 INFO L226 Difference]: Without dead ends: 3343 [2021-11-25 19:28:46,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:28:46,967 INFO L933 BasicCegarLoop]: 3221 mSDtfsCounter, 3425 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3425 SdHoareTripleChecker+Valid, 3363 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:28:46,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3425 Valid, 3363 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:28:46,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2021-11-25 19:28:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 3331. [2021-11-25 19:28:47,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3331 states, 2995 states have (on average 1.7465776293823039) internal successors, (5231), 3006 states have internal predecessors, (5231), 238 states have call successors, (238), 97 states have call predecessors, (238), 96 states have return successors, (236), 228 states have call predecessors, (236), 236 states have call successors, (236) [2021-11-25 19:28:47,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3331 states to 3331 states and 5705 transitions. [2021-11-25 19:28:47,141 INFO L78 Accepts]: Start accepts. Automaton has 3331 states and 5705 transitions. Word has length 95 [2021-11-25 19:28:47,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:28:47,143 INFO L470 AbstractCegarLoop]: Abstraction has 3331 states and 5705 transitions. [2021-11-25 19:28:47,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:28:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 3331 states and 5705 transitions. [2021-11-25 19:28:47,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 19:28:47,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:28:47,152 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:28:47,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:28:47,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:47,378 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:28:47,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:28:47,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1398361407, now seen corresponding path program 1 times [2021-11-25 19:28:47,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:28:47,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974857841] [2021-11-25 19:28:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:47,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:28:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 19:28:47,494 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:28:47,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974857841] [2021-11-25 19:28:47,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974857841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:28:47,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:28:47,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:28:47,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148629120] [2021-11-25 19:28:47,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:28:47,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:28:47,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:28:47,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:28:47,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:28:47,497 INFO L87 Difference]: Start difference. First operand 3331 states and 5705 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 19:28:48,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:28:48,085 INFO L93 Difference]: Finished difference Result 4647 states and 7668 transitions. [2021-11-25 19:28:48,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:28:48,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2021-11-25 19:28:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:28:48,114 INFO L225 Difference]: With dead ends: 4647 [2021-11-25 19:28:48,114 INFO L226 Difference]: Without dead ends: 3771 [2021-11-25 19:28:48,119 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 19:28:48,122 INFO L933 BasicCegarLoop]: 3283 mSDtfsCounter, 73 mSDsluCounter, 3452 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 6496 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:28:48,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 6496 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:28:48,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3771 states. [2021-11-25 19:28:48,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3771 to 3615. [2021-11-25 19:28:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3615 states, 3263 states have (on average 1.7428746552252528) internal successors, (5687), 3274 states have internal predecessors, (5687), 246 states have call successors, (246), 105 states have call predecessors, (246), 104 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2021-11-25 19:28:48,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3615 states to 3615 states and 6177 transitions. [2021-11-25 19:28:48,309 INFO L78 Accepts]: Start accepts. Automaton has 3615 states and 6177 transitions. Word has length 95 [2021-11-25 19:28:48,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:28:48,312 INFO L470 AbstractCegarLoop]: Abstraction has 3615 states and 6177 transitions. [2021-11-25 19:28:48,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 19:28:48,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3615 states and 6177 transitions. [2021-11-25 19:28:48,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-25 19:28:48,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:28:48,324 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:28:48,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:28:48,325 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:28:48,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:28:48,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1904805552, now seen corresponding path program 1 times [2021-11-25 19:28:48,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:28:48,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382798383] [2021-11-25 19:28:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:48,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:28:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-25 19:28:48,449 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:28:48,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382798383] [2021-11-25 19:28:48,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382798383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:28:48,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:28:48,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:28:48,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107803512] [2021-11-25 19:28:48,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:28:48,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:28:48,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:28:48,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:28:48,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:28:48,452 INFO L87 Difference]: Start difference. First operand 3615 states and 6177 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 19:28:49,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:28:49,081 INFO L93 Difference]: Finished difference Result 7480 states and 11970 transitions. [2021-11-25 19:28:49,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:28:49,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2021-11-25 19:28:49,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:28:49,127 INFO L225 Difference]: With dead ends: 7480 [2021-11-25 19:28:49,128 INFO L226 Difference]: Without dead ends: 5511 [2021-11-25 19:28:49,137 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 19:28:49,140 INFO L933 BasicCegarLoop]: 3223 mSDtfsCounter, 3417 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3417 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:28:49,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3417 Valid, 3365 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:28:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2021-11-25 19:28:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 5483. [2021-11-25 19:28:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5483 states, 4803 states have (on average 1.6537580678742452) internal successors, (7943), 4822 states have internal predecessors, (7943), 470 states have call successors, (470), 209 states have call predecessors, (470), 208 states have return successors, (468), 452 states have call predecessors, (468), 468 states have call successors, (468) [2021-11-25 19:28:49,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5483 states to 5483 states and 8881 transitions. [2021-11-25 19:28:49,441 INFO L78 Accepts]: Start accepts. Automaton has 5483 states and 8881 transitions. Word has length 127 [2021-11-25 19:28:49,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:28:49,442 INFO L470 AbstractCegarLoop]: Abstraction has 5483 states and 8881 transitions. [2021-11-25 19:28:49,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 19:28:49,443 INFO L276 IsEmpty]: Start isEmpty. Operand 5483 states and 8881 transitions. [2021-11-25 19:28:49,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-25 19:28:49,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:28:49,459 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:28:49,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:28:49,460 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:28:49,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:28:49,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1703604669, now seen corresponding path program 1 times [2021-11-25 19:28:49,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:28:49,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715072161] [2021-11-25 19:28:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:49,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:28:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-25 19:28:49,556 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:28:49,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715072161] [2021-11-25 19:28:49,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715072161] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:28:49,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:28:49,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:28:49,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004003645] [2021-11-25 19:28:49,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:28:49,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:28:49,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:28:49,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:28:49,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:28:49,562 INFO L87 Difference]: Start difference. First operand 5483 states and 8881 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 19:28:50,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:28:50,386 INFO L93 Difference]: Finished difference Result 13012 states and 20058 transitions. [2021-11-25 19:28:50,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:28:50,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2021-11-25 19:28:50,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:28:50,450 INFO L225 Difference]: With dead ends: 13012 [2021-11-25 19:28:50,461 INFO L226 Difference]: Without dead ends: 9175 [2021-11-25 19:28:50,477 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 19:28:50,479 INFO L933 BasicCegarLoop]: 3223 mSDtfsCounter, 3419 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3419 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:28:50,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3419 Valid, 3365 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:28:50,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9175 states. [2021-11-25 19:28:50,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9175 to 9123. [2021-11-25 19:28:50,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9123 states, 7803 states have (on average 1.575676022042804) internal successors, (12295), 7838 states have internal predecessors, (12295), 902 states have call successors, (902), 417 states have call predecessors, (902), 416 states have return successors, (900), 868 states have call predecessors, (900), 900 states have call successors, (900) [2021-11-25 19:28:50,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9123 states to 9123 states and 14097 transitions. [2021-11-25 19:28:50,975 INFO L78 Accepts]: Start accepts. Automaton has 9123 states and 14097 transitions. Word has length 127 [2021-11-25 19:28:50,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:28:50,977 INFO L470 AbstractCegarLoop]: Abstraction has 9123 states and 14097 transitions. [2021-11-25 19:28:50,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 19:28:50,977 INFO L276 IsEmpty]: Start isEmpty. Operand 9123 states and 14097 transitions. [2021-11-25 19:28:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-25 19:28:51,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:28:51,008 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:28:51,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:28:51,008 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:28:51,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:28:51,009 INFO L85 PathProgramCache]: Analyzing trace with hash 731720327, now seen corresponding path program 1 times [2021-11-25 19:28:51,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:28:51,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129977593] [2021-11-25 19:28:51,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:51,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:28:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:51,095 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-25 19:28:51,096 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:28:51,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129977593] [2021-11-25 19:28:51,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129977593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:28:51,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:28:51,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:28:51,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561898783] [2021-11-25 19:28:51,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:28:51,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:28:51,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:28:51,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:28:51,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:28:51,099 INFO L87 Difference]: Start difference. First operand 9123 states and 14097 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 19:28:52,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:28:52,001 INFO L93 Difference]: Finished difference Result 23788 states and 35642 transitions. [2021-11-25 19:28:52,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:28:52,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2021-11-25 19:28:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:28:52,095 INFO L225 Difference]: With dead ends: 23788 [2021-11-25 19:28:52,095 INFO L226 Difference]: Without dead ends: 16311 [2021-11-25 19:28:52,146 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 19:28:52,147 INFO L933 BasicCegarLoop]: 3238 mSDtfsCounter, 3422 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3422 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:28:52,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3422 Valid, 3380 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:28:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16311 states. [2021-11-25 19:28:52,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16311 to 16211. [2021-11-25 19:28:52,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16211 states, 13643 states have (on average 1.5157223484570843) internal successors, (20679), 13710 states have internal predecessors, (20679), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2021-11-25 19:28:53,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16211 states to 16211 states and 24145 transitions. [2021-11-25 19:28:53,037 INFO L78 Accepts]: Start accepts. Automaton has 16211 states and 24145 transitions. Word has length 127 [2021-11-25 19:28:53,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:28:53,038 INFO L470 AbstractCegarLoop]: Abstraction has 16211 states and 24145 transitions. [2021-11-25 19:28:53,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 19:28:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 16211 states and 24145 transitions. [2021-11-25 19:28:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 19:28:53,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:28:53,097 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:28:53,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 19:28:53,098 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:28:53,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:28:53,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1759001705, now seen corresponding path program 1 times [2021-11-25 19:28:53,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:28:53,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940910404] [2021-11-25 19:28:53,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:53,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:28:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-25 19:28:53,190 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:28:53,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940910404] [2021-11-25 19:28:53,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940910404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:28:53,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234891427] [2021-11-25 19:28:53,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:53,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:53,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:28:53,194 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:28:53,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:28:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:53,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:28:53,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:28:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 19:28:53,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:28:53,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234891427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:28:53,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:28:53,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 19:28:53,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218567504] [2021-11-25 19:28:53,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:28:53,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:28:53,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:28:53,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:28:53,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:28:53,728 INFO L87 Difference]: Start difference. First operand 16211 states and 24145 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 19:28:54,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:28:54,806 INFO L93 Difference]: Finished difference Result 23755 states and 35511 transitions. [2021-11-25 19:28:54,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:28:54,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 146 [2021-11-25 19:28:54,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:28:54,894 INFO L225 Difference]: With dead ends: 23755 [2021-11-25 19:28:54,895 INFO L226 Difference]: Without dead ends: 16279 [2021-11-25 19:28:54,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:28:54,931 INFO L933 BasicCegarLoop]: 3332 mSDtfsCounter, 140 mSDsluCounter, 3440 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 6532 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:28:54,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 6532 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:28:54,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16279 states. [2021-11-25 19:28:55,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16279 to 16147. [2021-11-25 19:28:55,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16147 states, 13579 states have (on average 1.4993003903085647) internal successors, (20359), 13646 states have internal predecessors, (20359), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2021-11-25 19:28:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16147 states to 16147 states and 23825 transitions. [2021-11-25 19:28:55,964 INFO L78 Accepts]: Start accepts. Automaton has 16147 states and 23825 transitions. Word has length 146 [2021-11-25 19:28:55,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:28:55,965 INFO L470 AbstractCegarLoop]: Abstraction has 16147 states and 23825 transitions. [2021-11-25 19:28:55,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 19:28:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 16147 states and 23825 transitions. [2021-11-25 19:28:56,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 19:28:56,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:28:56,040 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:28:56,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:28:56,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:56,262 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:28:56,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:28:56,263 INFO L85 PathProgramCache]: Analyzing trace with hash 912764745, now seen corresponding path program 1 times [2021-11-25 19:28:56,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:28:56,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524249324] [2021-11-25 19:28:56,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:56,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:28:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-25 19:28:56,418 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:28:56,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524249324] [2021-11-25 19:28:56,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524249324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:28:56,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965444109] [2021-11-25 19:28:56,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:56,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:56,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:28:56,421 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:28:56,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:28:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:56,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:28:56,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:28:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 19:28:56,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:28:56,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965444109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:28:56,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:28:56,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 19:28:56,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739184986] [2021-11-25 19:28:56,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:28:56,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:28:56,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:28:56,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:28:56,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:28:56,927 INFO L87 Difference]: Start difference. First operand 16147 states and 23825 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 19:28:58,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:28:58,299 INFO L93 Difference]: Finished difference Result 23659 states and 35031 transitions. [2021-11-25 19:28:58,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:28:58,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2021-11-25 19:28:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:28:58,369 INFO L225 Difference]: With dead ends: 23659 [2021-11-25 19:28:58,369 INFO L226 Difference]: Without dead ends: 16215 [2021-11-25 19:28:58,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:28:58,403 INFO L933 BasicCegarLoop]: 3327 mSDtfsCounter, 156 mSDsluCounter, 3439 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 6526 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:28:58,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 6526 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:28:58,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16215 states. [2021-11-25 19:28:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16215 to 16083. [2021-11-25 19:28:58,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16083 states, 13515 states have (on average 1.482722900480947) internal successors, (20039), 13582 states have internal predecessors, (20039), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2021-11-25 19:28:59,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16083 states to 16083 states and 23505 transitions. [2021-11-25 19:28:59,055 INFO L78 Accepts]: Start accepts. Automaton has 16083 states and 23505 transitions. Word has length 146 [2021-11-25 19:28:59,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:28:59,056 INFO L470 AbstractCegarLoop]: Abstraction has 16083 states and 23505 transitions. [2021-11-25 19:28:59,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 19:28:59,057 INFO L276 IsEmpty]: Start isEmpty. Operand 16083 states and 23505 transitions. [2021-11-25 19:28:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 19:28:59,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:28:59,094 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:28:59,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:28:59,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:59,310 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:28:59,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:28:59,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1617385942, now seen corresponding path program 1 times [2021-11-25 19:28:59,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:28:59,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065469636] [2021-11-25 19:28:59,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:59,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:28:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-25 19:28:59,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:28:59,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065469636] [2021-11-25 19:28:59,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065469636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:28:59,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887478071] [2021-11-25 19:28:59,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:59,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:59,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:28:59,398 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:28:59,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:28:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:59,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:28:59,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:28:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-25 19:28:59,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:28:59,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887478071] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:28:59,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:28:59,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 19:28:59,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872614243] [2021-11-25 19:28:59,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:28:59,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:28:59,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:28:59,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:28:59,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:28:59,889 INFO L87 Difference]: Start difference. First operand 16083 states and 23505 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 19:29:01,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:29:01,121 INFO L93 Difference]: Finished difference Result 27201 states and 38574 transitions. [2021-11-25 19:29:01,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:29:01,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2021-11-25 19:29:01,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:29:01,195 INFO L225 Difference]: With dead ends: 27201 [2021-11-25 19:29:01,196 INFO L226 Difference]: Without dead ends: 19853 [2021-11-25 19:29:01,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:29:01,221 INFO L933 BasicCegarLoop]: 3227 mSDtfsCounter, 3422 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3422 SdHoareTripleChecker+Valid, 3266 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:29:01,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3422 Valid, 3266 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:29:01,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19853 states. [2021-11-25 19:29:01,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19853 to 19853. [2021-11-25 19:29:01,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19853 states, 16905 states have (on average 1.4237799467613133) internal successors, (24069), 16972 states have internal predecessors, (24069), 1860 states have call successors, (1860), 1087 states have call predecessors, (1860), 1086 states have return successors, (1858), 1794 states have call predecessors, (1858), 1858 states have call successors, (1858) [2021-11-25 19:29:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19853 states to 19853 states and 27787 transitions. [2021-11-25 19:29:01,986 INFO L78 Accepts]: Start accepts. Automaton has 19853 states and 27787 transitions. Word has length 146 [2021-11-25 19:29:01,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:29:01,987 INFO L470 AbstractCegarLoop]: Abstraction has 19853 states and 27787 transitions. [2021-11-25 19:29:01,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 19:29:01,987 INFO L276 IsEmpty]: Start isEmpty. Operand 19853 states and 27787 transitions. [2021-11-25 19:29:02,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 19:29:02,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:29:02,027 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:29:02,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:29:02,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 19:29:02,254 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:29:02,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:29:02,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1953330758, now seen corresponding path program 1 times [2021-11-25 19:29:02,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:29:02,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158026140] [2021-11-25 19:29:02,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:29:02,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:29:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:29:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-25 19:29:02,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:29:02,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158026140] [2021-11-25 19:29:02,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158026140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:29:02,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48418406] [2021-11-25 19:29:02,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:29:02,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:29:02,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:29:02,346 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:29:02,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:29:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:29:02,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:29:02,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:29:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 19:29:02,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:29:02,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48418406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:29:02,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:29:02,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 19:29:02,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367987971] [2021-11-25 19:29:02,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:29:02,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:29:02,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:29:02,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:29:02,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:29:02,958 INFO L87 Difference]: Start difference. First operand 19853 states and 27787 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 19:29:04,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:29:04,126 INFO L93 Difference]: Finished difference Result 44457 states and 61892 transitions. [2021-11-25 19:29:04,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:29:04,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2021-11-25 19:29:04,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:29:04,242 INFO L225 Difference]: With dead ends: 44457 [2021-11-25 19:29:04,242 INFO L226 Difference]: Without dead ends: 26251 [2021-11-25 19:29:04,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:29:04,287 INFO L933 BasicCegarLoop]: 3230 mSDtfsCounter, 80 mSDsluCounter, 3434 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 6427 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:29:04,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 6427 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:29:04,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26251 states. [2021-11-25 19:29:05,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26251 to 21813. [2021-11-25 19:29:05,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21813 states, 18733 states have (on average 1.44563070517269) internal successors, (27081), 18801 states have internal predecessors, (27081), 1926 states have call successors, (1926), 1153 states have call predecessors, (1926), 1152 states have return successors, (1924), 1859 states have call predecessors, (1924), 1924 states have call successors, (1924) [2021-11-25 19:29:05,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21813 states to 21813 states and 30931 transitions. [2021-11-25 19:29:05,242 INFO L78 Accepts]: Start accepts. Automaton has 21813 states and 30931 transitions. Word has length 146 [2021-11-25 19:29:05,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:29:05,242 INFO L470 AbstractCegarLoop]: Abstraction has 21813 states and 30931 transitions. [2021-11-25 19:29:05,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 19:29:05,243 INFO L276 IsEmpty]: Start isEmpty. Operand 21813 states and 30931 transitions. [2021-11-25 19:29:05,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 19:29:05,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:29:05,290 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:29:05,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:29:05,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 19:29:05,518 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:29:05,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:29:05,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1356239262, now seen corresponding path program 2 times [2021-11-25 19:29:05,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:29:05,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839716302] [2021-11-25 19:29:05,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:29:05,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:29:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:29:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-25 19:29:05,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:29:05,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839716302] [2021-11-25 19:29:05,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839716302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:29:05,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180368018] [2021-11-25 19:29:05,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:29:05,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:29:05,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:29:05,650 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:29:05,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:29:05,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:29:05,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:29:05,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:29:05,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:29:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 19:29:06,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:29:06,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180368018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:29:06,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:29:06,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-25 19:29:06,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22140496] [2021-11-25 19:29:06,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:29:06,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:29:06,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:29:06,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:29:06,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:29:06,152 INFO L87 Difference]: Start difference. First operand 21813 states and 30931 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 19:29:07,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:29:07,499 INFO L93 Difference]: Finished difference Result 40347 states and 56949 transitions. [2021-11-25 19:29:07,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:29:07,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 146 [2021-11-25 19:29:07,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:29:07,644 INFO L225 Difference]: With dead ends: 40347 [2021-11-25 19:29:07,644 INFO L226 Difference]: Without dead ends: 30135 [2021-11-25 19:29:07,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:29:07,680 INFO L933 BasicCegarLoop]: 3308 mSDtfsCounter, 116 mSDsluCounter, 3451 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 6521 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:29:07,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 6521 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:29:07,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30135 states. [2021-11-25 19:29:08,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30135 to 25525. [2021-11-25 19:29:08,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25525 states, 22189 states have (on average 1.4771733741944206) internal successors, (32777), 22257 states have internal predecessors, (32777), 2054 states have call successors, (2054), 1281 states have call predecessors, (2054), 1280 states have return successors, (2052), 1987 states have call predecessors, (2052), 2052 states have call successors, (2052) [2021-11-25 19:29:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25525 states to 25525 states and 36883 transitions. [2021-11-25 19:29:08,809 INFO L78 Accepts]: Start accepts. Automaton has 25525 states and 36883 transitions. Word has length 146 [2021-11-25 19:29:08,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:29:08,809 INFO L470 AbstractCegarLoop]: Abstraction has 25525 states and 36883 transitions. [2021-11-25 19:29:08,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 19:29:08,809 INFO L276 IsEmpty]: Start isEmpty. Operand 25525 states and 36883 transitions. [2021-11-25 19:29:08,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-25 19:29:08,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:29:08,869 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:29:08,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:29:09,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:29:09,094 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:29:09,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:29:09,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1253953887, now seen corresponding path program 1 times [2021-11-25 19:29:09,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:29:09,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827347447] [2021-11-25 19:29:09,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:29:09,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:29:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:29:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-25 19:29:09,217 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:29:09,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827347447] [2021-11-25 19:29:09,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827347447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:29:09,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230752614] [2021-11-25 19:29:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:29:09,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:29:09,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:29:09,219 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:29:09,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:29:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:29:09,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:29:09,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:29:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:29:09,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:29:09,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230752614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:29:09,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:29:09,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-25 19:29:09,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260124916] [2021-11-25 19:29:09,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:29:09,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:29:09,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:29:09,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:29:09,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:29:09,726 INFO L87 Difference]: Start difference. First operand 25525 states and 36883 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 19:29:12,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:29:12,267 INFO L93 Difference]: Finished difference Result 74111 states and 105015 transitions. [2021-11-25 19:29:12,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:29:12,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 147 [2021-11-25 19:29:12,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:29:12,489 INFO L225 Difference]: With dead ends: 74111 [2021-11-25 19:29:12,489 INFO L226 Difference]: Without dead ends: 50233 [2021-11-25 19:29:12,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:29:12,549 INFO L933 BasicCegarLoop]: 3355 mSDtfsCounter, 3445 mSDsluCounter, 3766 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 6833 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:29:12,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3445 Valid, 6833 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:29:12,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50233 states. [2021-11-25 19:29:15,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50233 to 49965. [2021-11-25 19:29:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49965 states, 43243 states have (on average 1.431329926230835) internal successors, (61895), 43504 states have internal predecessors, (61895), 4035 states have call successors, (4035), 2558 states have call predecessors, (4035), 2685 states have return successors, (4829), 3903 states have call predecessors, (4829), 4033 states have call successors, (4829) [2021-11-25 19:29:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49965 states to 49965 states and 70759 transitions. [2021-11-25 19:29:15,331 INFO L78 Accepts]: Start accepts. Automaton has 49965 states and 70759 transitions. Word has length 147 [2021-11-25 19:29:15,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:29:15,332 INFO L470 AbstractCegarLoop]: Abstraction has 49965 states and 70759 transitions. [2021-11-25 19:29:15,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 19:29:15,332 INFO L276 IsEmpty]: Start isEmpty. Operand 49965 states and 70759 transitions. [2021-11-25 19:29:15,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-25 19:29:15,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:29:15,449 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:29:15,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:29:15,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 19:29:15,674 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:29:15,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:29:15,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1085692194, now seen corresponding path program 2 times [2021-11-25 19:29:15,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:29:15,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143438881] [2021-11-25 19:29:15,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:29:15,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:29:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:29:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-25 19:29:15,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:29:15,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143438881] [2021-11-25 19:29:15,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143438881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:29:15,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860665393] [2021-11-25 19:29:15,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:29:15,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:29:15,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:29:15,778 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:29:15,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:29:15,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 19:29:15,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:29:15,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:29:15,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:29:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:29:16,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:29:16,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860665393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:29:16,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:29:16,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 19:29:16,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595367876] [2021-11-25 19:29:16,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:29:16,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:29:16,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:29:16,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:29:16,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:29:16,184 INFO L87 Difference]: Start difference. First operand 49965 states and 70759 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 19:29:18,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:29:18,893 INFO L93 Difference]: Finished difference Result 98407 states and 141519 transitions. [2021-11-25 19:29:18,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:29:18,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 147 [2021-11-25 19:29:18,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:29:19,166 INFO L225 Difference]: With dead ends: 98407 [2021-11-25 19:29:19,167 INFO L226 Difference]: Without dead ends: 72937 [2021-11-25 19:29:19,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:29:19,272 INFO L933 BasicCegarLoop]: 3243 mSDtfsCounter, 3413 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3413 SdHoareTripleChecker+Valid, 3383 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:29:19,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3413 Valid, 3383 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:29:19,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72937 states. [2021-11-25 19:29:22,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72937 to 72417. [2021-11-25 19:29:22,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72417 states, 62439 states have (on average 1.4227486026361729) internal successors, (88835), 62764 states have internal predecessors, (88835), 6015 states have call successors, (6015), 3834 states have call predecessors, (6015), 3961 states have return successors, (7829), 5819 states have call predecessors, (7829), 6013 states have call successors, (7829) [2021-11-25 19:29:22,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72417 states to 72417 states and 102679 transitions. [2021-11-25 19:29:22,879 INFO L78 Accepts]: Start accepts. Automaton has 72417 states and 102679 transitions. Word has length 147 [2021-11-25 19:29:22,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:29:22,879 INFO L470 AbstractCegarLoop]: Abstraction has 72417 states and 102679 transitions. [2021-11-25 19:29:22,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 19:29:22,880 INFO L276 IsEmpty]: Start isEmpty. Operand 72417 states and 102679 transitions. [2021-11-25 19:29:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-25 19:29:23,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:29:23,070 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:29:23,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-25 19:29:23,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 19:29:23,271 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:29:23,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:29:23,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1575717844, now seen corresponding path program 3 times [2021-11-25 19:29:23,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:29:23,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184325630] [2021-11-25 19:29:23,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:29:23,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:29:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:29:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-25 19:29:23,366 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:29:23,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184325630] [2021-11-25 19:29:23,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184325630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:29:23,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595802950] [2021-11-25 19:29:23,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:29:23,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:29:23,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:29:23,383 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:29:23,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:29:23,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:29:23,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:29:23,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:29:23,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:29:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:29:23,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:29:23,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595802950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:29:23,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:29:23,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 19:29:23,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807200468] [2021-11-25 19:29:23,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:29:23,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:29:23,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:29:23,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:29:23,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:29:23,875 INFO L87 Difference]: Start difference. First operand 72417 states and 102679 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 19:29:27,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:29:27,148 INFO L93 Difference]: Finished difference Result 125327 states and 177820 transitions. [2021-11-25 19:29:27,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:29:27,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 147 [2021-11-25 19:29:27,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:29:27,494 INFO L225 Difference]: With dead ends: 125327 [2021-11-25 19:29:27,494 INFO L226 Difference]: Without dead ends: 84363 [2021-11-25 19:29:27,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:29:27,598 INFO L933 BasicCegarLoop]: 3232 mSDtfsCounter, 3395 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3395 SdHoareTripleChecker+Valid, 3278 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:29:27,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3395 Valid, 3278 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:29:27,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84363 states. [2021-11-25 19:29:31,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84363 to 83875. [2021-11-25 19:29:31,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83875 states, 73085 states have (on average 1.382622973250325) internal successors, (101049), 73474 states have internal predecessors, (101049), 6197 states have call successors, (6197), 4400 states have call predecessors, (6197), 4591 states have return successors, (8755), 6001 states have call predecessors, (8755), 6195 states have call successors, (8755) [2021-11-25 19:29:31,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83875 states to 83875 states and 116001 transitions. [2021-11-25 19:29:31,489 INFO L78 Accepts]: Start accepts. Automaton has 83875 states and 116001 transitions. Word has length 147 [2021-11-25 19:29:31,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:29:31,490 INFO L470 AbstractCegarLoop]: Abstraction has 83875 states and 116001 transitions. [2021-11-25 19:29:31,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 19:29:31,490 INFO L276 IsEmpty]: Start isEmpty. Operand 83875 states and 116001 transitions. [2021-11-25 19:29:31,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-25 19:29:31,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:29:31,655 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:29:31,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-25 19:29:31,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 19:29:31,856 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:29:31,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:29:31,856 INFO L85 PathProgramCache]: Analyzing trace with hash 662828878, now seen corresponding path program 1 times [2021-11-25 19:29:31,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:29:31,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119679487] [2021-11-25 19:29:31,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:29:31,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:29:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:29:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-25 19:29:31,939 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:29:31,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119679487] [2021-11-25 19:29:31,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119679487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:29:31,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910732163] [2021-11-25 19:29:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:29:31,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:29:31,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:29:31,946 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:29:31,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d9f70a5-7fa3-4ade-8723-0ee8a50af2fa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:29:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:29:32,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:29:32,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:29:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 19:29:32,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:29:32,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910732163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:29:32,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:29:32,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-25 19:29:32,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839555486] [2021-11-25 19:29:32,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:29:32,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:29:32,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:29:32,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:29:32,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:29:32,343 INFO L87 Difference]: Start difference. First operand 83875 states and 116001 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 19:29:35,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:29:35,951 INFO L93 Difference]: Finished difference Result 149545 states and 208623 transitions. [2021-11-25 19:29:35,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:29:35,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 143 [2021-11-25 19:29:35,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:29:36,425 INFO L225 Difference]: With dead ends: 149545 [2021-11-25 19:29:36,425 INFO L226 Difference]: Without dead ends: 93225 [2021-11-25 19:29:36,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:29:36,519 INFO L933 BasicCegarLoop]: 3300 mSDtfsCounter, 92 mSDsluCounter, 3451 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6513 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:29:36,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 6513 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:29:36,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93225 states.