./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW --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 b395f094f2d3990354e9b2c1428e908d883c16492f3b21174dd87f3c0cfda780 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:31:09,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:31:09,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:31:09,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:31:09,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:31:09,754 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:31:09,756 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:31:09,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:31:09,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:31:09,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:31:09,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:31:09,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:31:09,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:31:09,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:31:09,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:31:09,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:31:09,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:31:09,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:31:09,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:31:09,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:31:09,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:31:09,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:31:09,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:31:09,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:31:09,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:31:09,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:31:09,816 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:31:09,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:31:09,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:31:09,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:31:09,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:31:09,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:31:09,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:31:09,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:31:09,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:31:09,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:31:09,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:31:09,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:31:09,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:31:09,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:31:09,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:31:09,835 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:31:09,886 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:31:09,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:31:09,887 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:31:09,888 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:31:09,889 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:31:09,889 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:31:09,889 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:31:09,890 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:31:09,890 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:31:09,890 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:31:09,892 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:31:09,892 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:31:09,892 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:31:09,893 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:31:09,893 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:31:09,893 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:31:09,893 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:31:09,894 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:31:09,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:31:09,895 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:31:09,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:31:09,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:31:09,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:31:09,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:31:09,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:31:09,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:31:09,897 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:31:09,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:31:09,898 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:31:09,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:31:09,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:31:09,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:31:09,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:31:09,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:31:09,903 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:31:09,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:31:09,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:31:09,904 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:31:09,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:31:09,904 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:31:09,904 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:31:09,904 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b395f094f2d3990354e9b2c1428e908d883c16492f3b21174dd87f3c0cfda780 [2022-11-23 15:31:10,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:31:10,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:31:10,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:31:10,323 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:31:10,323 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:31:10,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c [2022-11-23 15:31:13,471 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:31:13,709 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:31:13,710 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c [2022-11-23 15:31:13,724 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/data/88766c787/e769e79e5c264aca899145033b8e2cb7/FLAG03ba0b49b [2022-11-23 15:31:13,743 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/data/88766c787/e769e79e5c264aca899145033b8e2cb7 [2022-11-23 15:31:13,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:31:13,748 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:31:13,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:31:13,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:31:13,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:31:13,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:31:13" (1/1) ... [2022-11-23 15:31:13,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ee3a038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:13, skipping insertion in model container [2022-11-23 15:31:13,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:31:13" (1/1) ... [2022-11-23 15:31:13,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:31:13,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:31:13,997 WARN L237 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_7f4353e8-4b30-4c7b-9171-8a1e7116f946/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[914,927] [2022-11-23 15:31:14,093 WARN L237 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_7f4353e8-4b30-4c7b-9171-8a1e7116f946/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[7115,7128] [2022-11-23 15:31:14,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:31:14,257 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:31:14,274 WARN L237 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_7f4353e8-4b30-4c7b-9171-8a1e7116f946/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[914,927] [2022-11-23 15:31:14,310 WARN L237 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_7f4353e8-4b30-4c7b-9171-8a1e7116f946/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[7115,7128] [2022-11-23 15:31:14,381 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:31:14,405 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:31:14,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:14 WrapperNode [2022-11-23 15:31:14,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:31:14,407 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:31:14,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:31:14,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:31:14,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:14" (1/1) ... [2022-11-23 15:31:14,450 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:14" (1/1) ... [2022-11-23 15:31:14,511 INFO L138 Inliner]: procedures = 67, calls = 78, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 750 [2022-11-23 15:31:14,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:31:14,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:31:14,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:31:14,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:31:14,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:14" (1/1) ... [2022-11-23 15:31:14,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:14" (1/1) ... [2022-11-23 15:31:14,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:14" (1/1) ... [2022-11-23 15:31:14,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:14" (1/1) ... [2022-11-23 15:31:14,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:14" (1/1) ... [2022-11-23 15:31:14,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:14" (1/1) ... [2022-11-23 15:31:14,554 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:14" (1/1) ... [2022-11-23 15:31:14,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:14" (1/1) ... [2022-11-23 15:31:14,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:31:14,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:31:14,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:31:14,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:31:14,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:14" (1/1) ... [2022-11-23 15:31:14,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:31:14,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:31:14,598 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:31:14,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:31:14,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:31:14,654 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 15:31:14,654 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 15:31:14,654 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-23 15:31:14,655 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-23 15:31:14,655 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-23 15:31:14,655 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-23 15:31:14,655 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-23 15:31:14,655 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-23 15:31:14,656 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-23 15:31:14,656 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-23 15:31:14,656 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-23 15:31:14,656 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-23 15:31:14,657 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-23 15:31:14,657 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-23 15:31:14,657 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-23 15:31:14,658 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-23 15:31:14,658 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-23 15:31:14,658 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-23 15:31:14,658 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-23 15:31:14,663 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-23 15:31:14,663 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-23 15:31:14,663 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-23 15:31:14,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:31:14,664 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-23 15:31:14,664 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-23 15:31:14,665 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-23 15:31:14,666 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-23 15:31:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:31:14,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:31:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-23 15:31:14,667 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-23 15:31:14,816 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:31:14,819 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:31:15,820 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:31:16,243 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:31:16,243 INFO L300 CfgBuilder]: Removed 14 assume(true) statements. [2022-11-23 15:31:16,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:31:16 BoogieIcfgContainer [2022-11-23 15:31:16,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:31:16,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:31:16,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:31:16,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:31:16,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:31:13" (1/3) ... [2022-11-23 15:31:16,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1491b2df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:31:16, skipping insertion in model container [2022-11-23 15:31:16,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:14" (2/3) ... [2022-11-23 15:31:16,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1491b2df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:31:16, skipping insertion in model container [2022-11-23 15:31:16,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:31:16" (3/3) ... [2022-11-23 15:31:16,266 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.07.cil-1.c [2022-11-23 15:31:16,288 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:31:16,288 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 15:31:16,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:31:16,372 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3de476ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:31:16,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 15:31:16,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 205 states, 153 states have (on average 1.522875816993464) internal successors, (233), 159 states have internal predecessors, (233), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-23 15:31:16,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 15:31:16,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:16,393 INFO L195 NwaCegarLoop]: 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] [2022-11-23 15:31:16,394 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:16,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:16,402 INFO L85 PathProgramCache]: Analyzing trace with hash -828462110, now seen corresponding path program 1 times [2022-11-23 15:31:16,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:16,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907928996] [2022-11-23 15:31:16,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:16,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:16,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:16,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907928996] [2022-11-23 15:31:16,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907928996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:16,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:16,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:31:16,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576201686] [2022-11-23 15:31:16,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:16,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:31:16,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:16,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:31:16,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:31:16,925 INFO L87 Difference]: Start difference. First operand has 205 states, 153 states have (on average 1.522875816993464) internal successors, (233), 159 states have internal predecessors, (233), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 15:31:18,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:18,012 INFO L93 Difference]: Finished difference Result 830 states and 1204 transitions. [2022-11-23 15:31:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:31:18,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-23 15:31:18,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:18,046 INFO L225 Difference]: With dead ends: 830 [2022-11-23 15:31:18,046 INFO L226 Difference]: Without dead ends: 611 [2022-11-23 15:31:18,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:31:18,057 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 909 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:18,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 1014 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 15:31:18,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-11-23 15:31:18,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 540. [2022-11-23 15:31:18,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 387 states have (on average 1.3385012919896642) internal successors, (518), 391 states have internal predecessors, (518), 90 states have call successors, (90), 62 states have call predecessors, (90), 61 states have return successors, (103), 88 states have call predecessors, (103), 88 states have call successors, (103) [2022-11-23 15:31:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 711 transitions. [2022-11-23 15:31:18,161 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 711 transitions. Word has length 45 [2022-11-23 15:31:18,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:18,162 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 711 transitions. [2022-11-23 15:31:18,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 15:31:18,162 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 711 transitions. [2022-11-23 15:31:18,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 15:31:18,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:18,165 INFO L195 NwaCegarLoop]: 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] [2022-11-23 15:31:18,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:31:18,165 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:18,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:18,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2107454651, now seen corresponding path program 1 times [2022-11-23 15:31:18,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:18,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483641454] [2022-11-23 15:31:18,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:18,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:18,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:18,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483641454] [2022-11-23 15:31:18,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483641454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:18,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:18,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 15:31:18,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453077880] [2022-11-23 15:31:18,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:18,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:31:18,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:18,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:31:18,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:31:18,638 INFO L87 Difference]: Start difference. First operand 540 states and 711 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 15:31:19,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:19,459 INFO L93 Difference]: Finished difference Result 1301 states and 1658 transitions. [2022-11-23 15:31:19,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 15:31:19,460 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-23 15:31:19,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:19,492 INFO L225 Difference]: With dead ends: 1301 [2022-11-23 15:31:19,492 INFO L226 Difference]: Without dead ends: 898 [2022-11-23 15:31:19,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:31:19,497 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 426 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:19,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 851 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:31:19,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-11-23 15:31:19,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 869. [2022-11-23 15:31:19,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 610 states have (on average 1.2934426229508196) internal successors, (789), 615 states have internal predecessors, (789), 146 states have call successors, (146), 110 states have call predecessors, (146), 111 states have return successors, (177), 145 states have call predecessors, (177), 144 states have call successors, (177) [2022-11-23 15:31:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1112 transitions. [2022-11-23 15:31:19,617 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1112 transitions. Word has length 46 [2022-11-23 15:31:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:19,617 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1112 transitions. [2022-11-23 15:31:19,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 15:31:19,618 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1112 transitions. [2022-11-23 15:31:19,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 15:31:19,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:19,620 INFO L195 NwaCegarLoop]: 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] [2022-11-23 15:31:19,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:31:19,621 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:19,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:19,622 INFO L85 PathProgramCache]: Analyzing trace with hash -223685774, now seen corresponding path program 1 times [2022-11-23 15:31:19,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:19,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147397999] [2022-11-23 15:31:19,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:19,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:19,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:19,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147397999] [2022-11-23 15:31:19,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147397999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:19,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:19,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:31:19,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191335610] [2022-11-23 15:31:19,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:19,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:31:19,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:19,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:31:19,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:19,690 INFO L87 Difference]: Start difference. First operand 869 states and 1112 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:31:19,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:19,901 INFO L93 Difference]: Finished difference Result 1810 states and 2271 transitions. [2022-11-23 15:31:19,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:31:19,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-23 15:31:19,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:19,908 INFO L225 Difference]: With dead ends: 1810 [2022-11-23 15:31:19,908 INFO L226 Difference]: Without dead ends: 1128 [2022-11-23 15:31:19,910 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:31:19,911 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 68 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:19,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 473 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:31:19,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-11-23 15:31:20,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1106. [2022-11-23 15:31:20,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 771 states have (on average 1.2749675745784694) internal successors, (983), 776 states have internal predecessors, (983), 188 states have call successors, (188), 148 states have call predecessors, (188), 145 states have return successors, (223), 183 states have call predecessors, (223), 186 states have call successors, (223) [2022-11-23 15:31:20,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1394 transitions. [2022-11-23 15:31:20,038 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1394 transitions. Word has length 47 [2022-11-23 15:31:20,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:20,039 INFO L495 AbstractCegarLoop]: Abstraction has 1106 states and 1394 transitions. [2022-11-23 15:31:20,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:31:20,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1394 transitions. [2022-11-23 15:31:20,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-23 15:31:20,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:20,042 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:20,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:31:20,043 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:20,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:20,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1556248517, now seen corresponding path program 1 times [2022-11-23 15:31:20,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:20,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900473039] [2022-11-23 15:31:20,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:20,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:31:20,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:20,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900473039] [2022-11-23 15:31:20,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900473039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:20,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:20,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:31:20,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261640569] [2022-11-23 15:31:20,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:20,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:31:20,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:20,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:31:20,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:20,100 INFO L87 Difference]: Start difference. First operand 1106 states and 1394 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:31:20,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:20,258 INFO L93 Difference]: Finished difference Result 1512 states and 1884 transitions. [2022-11-23 15:31:20,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:31:20,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-23 15:31:20,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:20,265 INFO L225 Difference]: With dead ends: 1512 [2022-11-23 15:31:20,265 INFO L226 Difference]: Without dead ends: 957 [2022-11-23 15:31:20,267 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:31:20,268 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 257 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:20,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 314 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:31:20,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-11-23 15:31:20,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 751. [2022-11-23 15:31:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 535 states have (on average 1.2710280373831775) internal successors, (680), 539 states have internal predecessors, (680), 125 states have call successors, (125), 94 states have call predecessors, (125), 89 states have return successors, (131), 119 states have call predecessors, (131), 123 states have call successors, (131) [2022-11-23 15:31:20,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 936 transitions. [2022-11-23 15:31:20,348 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 936 transitions. Word has length 53 [2022-11-23 15:31:20,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:20,349 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 936 transitions. [2022-11-23 15:31:20,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:31:20,350 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 936 transitions. [2022-11-23 15:31:20,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 15:31:20,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:20,351 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:20,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:31:20,352 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:20,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:20,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1834653725, now seen corresponding path program 1 times [2022-11-23 15:31:20,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:20,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453792248] [2022-11-23 15:31:20,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:20,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:20,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:20,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453792248] [2022-11-23 15:31:20,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453792248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:20,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:20,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:31:20,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67494102] [2022-11-23 15:31:20,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:20,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:31:20,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:20,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:31:20,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:31:20,442 INFO L87 Difference]: Start difference. First operand 751 states and 936 transitions. 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 15:31:20,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:20,816 INFO L93 Difference]: Finished difference Result 1006 states and 1237 transitions. [2022-11-23 15:31:20,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:31:20,816 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-23 15:31:20,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:20,821 INFO L225 Difference]: With dead ends: 1006 [2022-11-23 15:31:20,822 INFO L226 Difference]: Without dead ends: 1003 [2022-11-23 15:31:20,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:31:20,827 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 473 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:20,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 293 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:31:20,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-11-23 15:31:20,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 750. [2022-11-23 15:31:20,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 535 states have (on average 1.2598130841121495) internal successors, (674), 538 states have internal predecessors, (674), 124 states have call successors, (124), 94 states have call predecessors, (124), 89 states have return successors, (131), 119 states have call predecessors, (131), 123 states have call successors, (131) [2022-11-23 15:31:20,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 929 transitions. [2022-11-23 15:31:20,920 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 929 transitions. Word has length 54 [2022-11-23 15:31:20,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:20,922 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 929 transitions. [2022-11-23 15:31:20,922 INFO L496 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 15:31:20,922 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 929 transitions. [2022-11-23 15:31:20,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-23 15:31:20,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:20,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:20,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:31:20,925 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:20,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:20,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1361671707, now seen corresponding path program 1 times [2022-11-23 15:31:20,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:20,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197913197] [2022-11-23 15:31:20,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:20,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:21,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:21,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197913197] [2022-11-23 15:31:21,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197913197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:21,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:21,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:31:21,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183077084] [2022-11-23 15:31:21,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:21,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:31:21,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:21,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:31:21,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:31:21,100 INFO L87 Difference]: Start difference. First operand 750 states and 929 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 15:31:21,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:21,969 INFO L93 Difference]: Finished difference Result 1353 states and 1903 transitions. [2022-11-23 15:31:21,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:31:21,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2022-11-23 15:31:21,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:21,977 INFO L225 Difference]: With dead ends: 1353 [2022-11-23 15:31:21,977 INFO L226 Difference]: Without dead ends: 1227 [2022-11-23 15:31:21,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:31:21,982 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 983 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:21,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [995 Valid, 994 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 15:31:21,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2022-11-23 15:31:22,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1216. [2022-11-23 15:31:22,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 912 states have (on average 1.355263157894737) internal successors, (1236), 918 states have internal predecessors, (1236), 189 states have call successors, (189), 118 states have call predecessors, (189), 113 states have return successors, (238), 181 states have call predecessors, (238), 188 states have call successors, (238) [2022-11-23 15:31:22,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1663 transitions. [2022-11-23 15:31:22,131 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1663 transitions. Word has length 52 [2022-11-23 15:31:22,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:22,133 INFO L495 AbstractCegarLoop]: Abstraction has 1216 states and 1663 transitions. [2022-11-23 15:31:22,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 15:31:22,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1663 transitions. [2022-11-23 15:31:22,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 15:31:22,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:22,136 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:22,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:31:22,136 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:22,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:22,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1040757541, now seen corresponding path program 1 times [2022-11-23 15:31:22,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:22,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167766518] [2022-11-23 15:31:22,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:22,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:22,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:22,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167766518] [2022-11-23 15:31:22,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167766518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:31:22,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868111859] [2022-11-23 15:31:22,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:22,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:22,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:31:22,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:31:22,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:31:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:22,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:31:22,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:31:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:22,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:31:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:23,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868111859] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:31:23,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [68878056] [2022-11-23 15:31:23,095 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-23 15:31:23,095 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:31:23,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:31:23,106 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:31:23,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:31:27,044 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 155 for LOIs [2022-11-23 15:31:27,076 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 151 for LOIs [2022-11-23 15:31:27,101 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 159 for LOIs [2022-11-23 15:31:27,760 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 155 for LOIs [2022-11-23 15:31:27,857 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 155 for LOIs [2022-11-23 15:31:27,949 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 155 for LOIs [2022-11-23 15:31:27,988 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 162 for LOIs [2022-11-23 15:31:28,025 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:31:44,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [68878056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:44,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:31:44,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2022-11-23 15:31:44,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156070567] [2022-11-23 15:31:44,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:44,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-23 15:31:44,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:44,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-23 15:31:44,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 15:31:44,882 INFO L87 Difference]: Start difference. First operand 1216 states and 1663 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 15:32:14,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:32:14,774 INFO L93 Difference]: Finished difference Result 1877 states and 2437 transitions. [2022-11-23 15:32:14,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-23 15:32:14,777 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-11-23 15:32:14,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:32:14,783 INFO L225 Difference]: With dead ends: 1877 [2022-11-23 15:32:14,783 INFO L226 Difference]: Without dead ends: 1264 [2022-11-23 15:32:14,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 36.4s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2022-11-23 15:32:14,787 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 153 mSDsluCounter, 2268 mSDsCounter, 0 mSdLazyCounter, 5443 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 2490 SdHoareTripleChecker+Invalid, 5586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 5443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:32:14,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 2490 Invalid, 5586 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [143 Valid, 5443 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2022-11-23 15:32:14,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-11-23 15:32:14,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1249. [2022-11-23 15:32:14,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 937 states have (on average 1.3468516542155817) internal successors, (1262), 943 states have internal predecessors, (1262), 191 states have call successors, (191), 124 states have call predecessors, (191), 119 states have return successors, (240), 183 states have call predecessors, (240), 190 states have call successors, (240) [2022-11-23 15:32:14,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1693 transitions. [2022-11-23 15:32:14,915 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1693 transitions. Word has length 55 [2022-11-23 15:32:14,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:32:14,916 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 1693 transitions. [2022-11-23 15:32:14,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 15:32:14,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1693 transitions. [2022-11-23 15:32:14,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 15:32:14,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:32:14,918 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 15:32:14,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:32:15,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 15:32:15,135 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:32:15,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:32:15,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1764559944, now seen corresponding path program 1 times [2022-11-23 15:32:15,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:32:15,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181899560] [2022-11-23 15:32:15,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:32:15,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:32:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:32:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:32:15,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:32:15,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181899560] [2022-11-23 15:32:15,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181899560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:32:15,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:32:15,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:32:15,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032452850] [2022-11-23 15:32:15,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:32:15,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:32:15,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:32:15,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:32:15,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:32:15,210 INFO L87 Difference]: Start difference. First operand 1249 states and 1693 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2022-11-23 15:32:15,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:32:15,475 INFO L93 Difference]: Finished difference Result 1831 states and 2376 transitions. [2022-11-23 15:32:15,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:32:15,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 61 [2022-11-23 15:32:15,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:32:15,491 INFO L225 Difference]: With dead ends: 1831 [2022-11-23 15:32:15,491 INFO L226 Difference]: Without dead ends: 1458 [2022-11-23 15:32:15,509 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:32:15,511 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 43 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:32:15,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 510 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:32:15,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2022-11-23 15:32:15,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1370. [2022-11-23 15:32:15,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1018 states have (on average 1.331041257367387) internal successors, (1355), 1028 states have internal predecessors, (1355), 213 states have call successors, (213), 146 states have call predecessors, (213), 137 states have return successors, (262), 197 states have call predecessors, (262), 212 states have call successors, (262) [2022-11-23 15:32:15,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 1830 transitions. [2022-11-23 15:32:15,659 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 1830 transitions. Word has length 61 [2022-11-23 15:32:15,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:32:15,660 INFO L495 AbstractCegarLoop]: Abstraction has 1370 states and 1830 transitions. [2022-11-23 15:32:15,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2022-11-23 15:32:15,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 1830 transitions. [2022-11-23 15:32:15,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-23 15:32:15,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:32:15,662 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-11-23 15:32:15,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:32:15,662 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:32:15,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:32:15,663 INFO L85 PathProgramCache]: Analyzing trace with hash -543402847, now seen corresponding path program 1 times [2022-11-23 15:32:15,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:32:15,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241512109] [2022-11-23 15:32:15,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:32:15,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:32:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:32:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:32:15,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:32:15,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241512109] [2022-11-23 15:32:15,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241512109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:32:15,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:32:15,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 15:32:15,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564031917] [2022-11-23 15:32:15,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:32:15,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:32:15,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:32:15,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:32:15,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:32:15,822 INFO L87 Difference]: Start difference. First operand 1370 states and 1830 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 15:32:16,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:32:16,727 INFO L93 Difference]: Finished difference Result 2367 states and 2990 transitions. [2022-11-23 15:32:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 15:32:16,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2022-11-23 15:32:16,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:32:16,742 INFO L225 Difference]: With dead ends: 2367 [2022-11-23 15:32:16,742 INFO L226 Difference]: Without dead ends: 1681 [2022-11-23 15:32:16,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:32:16,749 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 404 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:32:16,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 714 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:32:16,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1681 states. [2022-11-23 15:32:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1681 to 1550. [2022-11-23 15:32:16,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1138 states have (on average 1.3040421792618628) internal successors, (1484), 1148 states have internal predecessors, (1484), 245 states have call successors, (245), 174 states have call predecessors, (245), 165 states have return successors, (294), 229 states have call predecessors, (294), 244 states have call successors, (294) [2022-11-23 15:32:16,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2023 transitions. [2022-11-23 15:32:16,968 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2023 transitions. Word has length 63 [2022-11-23 15:32:16,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:32:16,968 INFO L495 AbstractCegarLoop]: Abstraction has 1550 states and 2023 transitions. [2022-11-23 15:32:16,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 15:32:16,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2023 transitions. [2022-11-23 15:32:16,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-23 15:32:16,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:32:16,971 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-11-23 15:32:16,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:32:16,972 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:32:16,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:32:16,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1355168719, now seen corresponding path program 1 times [2022-11-23 15:32:16,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:32:16,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869427009] [2022-11-23 15:32:16,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:32:16,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:32:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:32:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:32:17,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:32:17,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869427009] [2022-11-23 15:32:17,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869427009] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:32:17,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619846301] [2022-11-23 15:32:17,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:32:17,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:32:17,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:32:17,108 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:32:17,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:32:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:32:17,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:32:17,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:32:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:32:17,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:32:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:32:17,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619846301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:32:17,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2061004294] [2022-11-23 15:32:17,723 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-23 15:32:17,723 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:32:17,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:32:17,724 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:32:17,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:32:26,527 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 155 for LOIs [2022-11-23 15:32:26,549 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 223 for LOIs [2022-11-23 15:32:26,605 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 217 for LOIs [2022-11-23 15:32:26,670 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 159 for LOIs [2022-11-23 15:32:27,052 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 155 for LOIs [2022-11-23 15:32:27,097 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 155 for LOIs [2022-11-23 15:32:27,139 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 155 for LOIs [2022-11-23 15:32:27,170 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 162 for LOIs [2022-11-23 15:32:27,188 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:32:58,731 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35209#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 2 ~E_5~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 15:32:58,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:32:58,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:32:58,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-23 15:32:58,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175205644] [2022-11-23 15:32:58,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:32:58,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:32:58,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:32:58,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:32:58,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-23 15:32:58,734 INFO L87 Difference]: Start difference. First operand 1550 states and 2023 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-23 15:32:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:32:59,725 INFO L93 Difference]: Finished difference Result 3757 states and 4552 transitions. [2022-11-23 15:32:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:32:59,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-11-23 15:32:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:32:59,747 INFO L225 Difference]: With dead ends: 3757 [2022-11-23 15:32:59,748 INFO L226 Difference]: Without dead ends: 3754 [2022-11-23 15:32:59,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-23 15:32:59,752 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 509 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:32:59,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 975 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:32:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2022-11-23 15:33:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 2865. [2022-11-23 15:33:00,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2030 states have (on average 1.2443349753694581) internal successors, (2526), 2048 states have internal predecessors, (2526), 472 states have call successors, (472), 378 states have call predecessors, (472), 361 states have return successors, (533), 440 states have call predecessors, (533), 471 states have call successors, (533) [2022-11-23 15:33:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 3531 transitions. [2022-11-23 15:33:00,226 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 3531 transitions. Word has length 64 [2022-11-23 15:33:00,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:00,227 INFO L495 AbstractCegarLoop]: Abstraction has 2865 states and 3531 transitions. [2022-11-23 15:33:00,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-23 15:33:00,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 3531 transitions. [2022-11-23 15:33:00,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-23 15:33:00,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:00,230 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1] [2022-11-23 15:33:00,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:00,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:33:00,436 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:00,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:00,437 INFO L85 PathProgramCache]: Analyzing trace with hash 804350377, now seen corresponding path program 2 times [2022-11-23 15:33:00,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:00,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055627637] [2022-11-23 15:33:00,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:00,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:33:00,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:00,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055627637] [2022-11-23 15:33:00,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055627637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:00,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:00,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:33:00,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017554329] [2022-11-23 15:33:00,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:00,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:33:00,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:33:00,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:33:00,503 INFO L87 Difference]: Start difference. First operand 2865 states and 3531 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 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) [2022-11-23 15:33:00,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:00,918 INFO L93 Difference]: Finished difference Result 4061 states and 4903 transitions. [2022-11-23 15:33:00,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:33:00,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 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 67 [2022-11-23 15:33:00,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:00,930 INFO L225 Difference]: With dead ends: 4061 [2022-11-23 15:33:00,930 INFO L226 Difference]: Without dead ends: 2123 [2022-11-23 15:33:00,935 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:33:00,936 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 262 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:00,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 352 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:33:00,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-11-23 15:33:01,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2107. [2022-11-23 15:33:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 1524 states have (on average 1.2591863517060367) internal successors, (1919), 1534 states have internal predecessors, (1919), 336 states have call successors, (336), 254 states have call predecessors, (336), 245 states have return successors, (389), 320 states have call predecessors, (389), 335 states have call successors, (389) [2022-11-23 15:33:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 2644 transitions. [2022-11-23 15:33:01,293 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 2644 transitions. Word has length 67 [2022-11-23 15:33:01,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:01,294 INFO L495 AbstractCegarLoop]: Abstraction has 2107 states and 2644 transitions. [2022-11-23 15:33:01,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 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) [2022-11-23 15:33:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 2644 transitions. [2022-11-23 15:33:01,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-23 15:33:01,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:01,298 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-23 15:33:01,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 15:33:01,298 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:01,299 INFO L85 PathProgramCache]: Analyzing trace with hash 729881269, now seen corresponding path program 1 times [2022-11-23 15:33:01,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:01,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467864829] [2022-11-23 15:33:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:01,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:33:01,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:01,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467864829] [2022-11-23 15:33:01,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467864829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:01,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:01,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:33:01,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764696847] [2022-11-23 15:33:01,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:01,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:33:01,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:01,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:33:01,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:33:01,352 INFO L87 Difference]: Start difference. First operand 2107 states and 2644 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-11-23 15:33:01,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:01,778 INFO L93 Difference]: Finished difference Result 3704 states and 4472 transitions. [2022-11-23 15:33:01,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:33:01,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 71 [2022-11-23 15:33:01,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:01,789 INFO L225 Difference]: With dead ends: 3704 [2022-11-23 15:33:01,790 INFO L226 Difference]: Without dead ends: 2325 [2022-11-23 15:33:01,793 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:33:01,794 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 38 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:01,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 503 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:33:01,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2022-11-23 15:33:02,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 2244. [2022-11-23 15:33:02,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 1621 states have (on average 1.2529302899444787) internal successors, (2031), 1637 states have internal predecessors, (2031), 357 states have call successors, (357), 275 states have call predecessors, (357), 264 states have return successors, (416), 333 states have call predecessors, (416), 356 states have call successors, (416) [2022-11-23 15:33:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 2804 transitions. [2022-11-23 15:33:02,174 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 2804 transitions. Word has length 71 [2022-11-23 15:33:02,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:02,175 INFO L495 AbstractCegarLoop]: Abstraction has 2244 states and 2804 transitions. [2022-11-23 15:33:02,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-11-23 15:33:02,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 2804 transitions. [2022-11-23 15:33:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 15:33:02,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:02,178 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:02,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 15:33:02,178 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:02,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:02,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1445641267, now seen corresponding path program 1 times [2022-11-23 15:33:02,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:02,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878599758] [2022-11-23 15:33:02,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:02,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 15:33:02,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:02,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878599758] [2022-11-23 15:33:02,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878599758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:02,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343300901] [2022-11-23 15:33:02,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:02,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:02,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:02,559 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:02,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:33:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:02,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 15:33:02,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:33:02,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:33:02,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343300901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:02,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:33:02,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-23 15:33:02,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787019599] [2022-11-23 15:33:02,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:02,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:33:02,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:02,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:33:02,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:33:02,764 INFO L87 Difference]: Start difference. First operand 2244 states and 2804 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:33:03,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:03,359 INFO L93 Difference]: Finished difference Result 3644 states and 4460 transitions. [2022-11-23 15:33:03,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:33:03,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-23 15:33:03,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:03,369 INFO L225 Difference]: With dead ends: 3644 [2022-11-23 15:33:03,369 INFO L226 Difference]: Without dead ends: 2025 [2022-11-23 15:33:03,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-23 15:33:03,374 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 255 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:03,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1056 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:33:03,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2022-11-23 15:33:03,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1737. [2022-11-23 15:33:03,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1305 states have (on average 1.282758620689655) internal successors, (1674), 1319 states have internal predecessors, (1674), 253 states have call successors, (253), 184 states have call predecessors, (253), 177 states have return successors, (306), 235 states have call predecessors, (306), 252 states have call successors, (306) [2022-11-23 15:33:03,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2233 transitions. [2022-11-23 15:33:03,653 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2233 transitions. Word has length 102 [2022-11-23 15:33:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:03,653 INFO L495 AbstractCegarLoop]: Abstraction has 1737 states and 2233 transitions. [2022-11-23 15:33:03,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:33:03,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2233 transitions. [2022-11-23 15:33:03,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 15:33:03,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:03,657 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-23 15:33:03,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:03,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:03,864 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:03,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:03,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1222040967, now seen corresponding path program 1 times [2022-11-23 15:33:03,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:03,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096171144] [2022-11-23 15:33:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:03,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:33:04,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:04,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096171144] [2022-11-23 15:33:04,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096171144] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:04,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668942290] [2022-11-23 15:33:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:04,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:04,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:04,029 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:04,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:33:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:04,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:33:04,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 15:33:04,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:33:04,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668942290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:04,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:33:04,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:33:04,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044276740] [2022-11-23 15:33:04,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:04,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:33:04,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:04,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:33:04,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:33:04,283 INFO L87 Difference]: Start difference. First operand 1737 states and 2233 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:33:04,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:04,718 INFO L93 Difference]: Finished difference Result 2905 states and 4132 transitions. [2022-11-23 15:33:04,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:33:04,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-23 15:33:04,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:04,731 INFO L225 Difference]: With dead ends: 2905 [2022-11-23 15:33:04,731 INFO L226 Difference]: Without dead ends: 2313 [2022-11-23 15:33:04,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:33:04,735 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 253 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:04,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 401 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:33:04,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-11-23 15:33:05,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2306. [2022-11-23 15:33:05,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 1767 states have (on average 1.3338992642897567) internal successors, (2357), 1784 states have internal predecessors, (2357), 330 states have call successors, (330), 214 states have call predecessors, (330), 207 states have return successors, (421), 309 states have call predecessors, (421), 329 states have call successors, (421) [2022-11-23 15:33:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 3108 transitions. [2022-11-23 15:33:05,095 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 3108 transitions. Word has length 101 [2022-11-23 15:33:05,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:05,095 INFO L495 AbstractCegarLoop]: Abstraction has 2306 states and 3108 transitions. [2022-11-23 15:33:05,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:33:05,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 3108 transitions. [2022-11-23 15:33:05,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 15:33:05,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:05,104 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-23 15:33:05,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:05,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:05,312 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:05,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:05,312 INFO L85 PathProgramCache]: Analyzing trace with hash 30957047, now seen corresponding path program 1 times [2022-11-23 15:33:05,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:05,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382067673] [2022-11-23 15:33:05,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:05,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:33:05,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:05,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382067673] [2022-11-23 15:33:05,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382067673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:05,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674726994] [2022-11-23 15:33:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:05,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:05,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:05,477 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:05,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:33:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:05,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:33:05,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 15:33:05,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:33:05,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674726994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:05,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:33:05,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:33:05,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310664841] [2022-11-23 15:33:05,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:05,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:33:05,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:05,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:33:05,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:33:05,749 INFO L87 Difference]: Start difference. First operand 2306 states and 3108 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:33:06,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:06,262 INFO L93 Difference]: Finished difference Result 4597 states and 6804 transitions. [2022-11-23 15:33:06,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:33:06,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-23 15:33:06,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:06,284 INFO L225 Difference]: With dead ends: 4597 [2022-11-23 15:33:06,285 INFO L226 Difference]: Without dead ends: 3436 [2022-11-23 15:33:06,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:33:06,291 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 247 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:06,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 401 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:33:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2022-11-23 15:33:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 3424. [2022-11-23 15:33:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 2676 states have (on average 1.3800448430493273) internal successors, (3693), 2699 states have internal predecessors, (3693), 479 states have call successors, (479), 274 states have call predecessors, (479), 267 states have return successors, (642), 452 states have call predecessors, (642), 478 states have call successors, (642) [2022-11-23 15:33:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 4814 transitions. [2022-11-23 15:33:06,635 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 4814 transitions. Word has length 101 [2022-11-23 15:33:06,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:06,636 INFO L495 AbstractCegarLoop]: Abstraction has 3424 states and 4814 transitions. [2022-11-23 15:33:06,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:33:06,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 4814 transitions. [2022-11-23 15:33:06,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 15:33:06,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:06,642 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-23 15:33:06,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 15:33:06,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 15:33:06,849 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:06,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:06,849 INFO L85 PathProgramCache]: Analyzing trace with hash -511602699, now seen corresponding path program 1 times [2022-11-23 15:33:06,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:06,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185248782] [2022-11-23 15:33:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:06,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:33:06,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:06,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185248782] [2022-11-23 15:33:06,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185248782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:06,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539448109] [2022-11-23 15:33:06,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:06,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:06,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:06,962 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:06,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:33:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:07,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:33:07,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:33:07,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:33:07,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539448109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:07,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:33:07,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:33:07,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255867723] [2022-11-23 15:33:07,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:07,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:33:07,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:07,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:33:07,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:33:07,187 INFO L87 Difference]: Start difference. First operand 3424 states and 4814 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:33:07,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:07,906 INFO L93 Difference]: Finished difference Result 7921 states and 12007 transitions. [2022-11-23 15:33:07,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:33:07,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-23 15:33:07,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:07,938 INFO L225 Difference]: With dead ends: 7921 [2022-11-23 15:33:07,938 INFO L226 Difference]: Without dead ends: 5642 [2022-11-23 15:33:07,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:33:07,949 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 256 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:07,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 401 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:33:07,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5642 states. [2022-11-23 15:33:08,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5642 to 5620. [2022-11-23 15:33:08,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5620 states, 4464 states have (on average 1.412410394265233) internal successors, (6305), 4499 states have internal predecessors, (6305), 767 states have call successors, (767), 394 states have call predecessors, (767), 387 states have return successors, (1066), 728 states have call predecessors, (1066), 766 states have call successors, (1066) [2022-11-23 15:33:08,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5620 states to 5620 states and 8138 transitions. [2022-11-23 15:33:08,711 INFO L78 Accepts]: Start accepts. Automaton has 5620 states and 8138 transitions. Word has length 101 [2022-11-23 15:33:08,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:08,711 INFO L495 AbstractCegarLoop]: Abstraction has 5620 states and 8138 transitions. [2022-11-23 15:33:08,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:33:08,711 INFO L276 IsEmpty]: Start isEmpty. Operand 5620 states and 8138 transitions. [2022-11-23 15:33:08,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 15:33:08,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:08,723 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-23 15:33:08,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:08,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 15:33:08,930 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:08,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:08,930 INFO L85 PathProgramCache]: Analyzing trace with hash -8537161, now seen corresponding path program 1 times [2022-11-23 15:33:08,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:08,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464309596] [2022-11-23 15:33:08,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:08,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 15:33:09,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:09,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464309596] [2022-11-23 15:33:09,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464309596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:09,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:09,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:33:09,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030906592] [2022-11-23 15:33:09,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:09,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:33:09,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:09,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:33:09,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:33:09,066 INFO L87 Difference]: Start difference. First operand 5620 states and 8138 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 15:33:09,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:09,907 INFO L93 Difference]: Finished difference Result 10230 states and 15503 transitions. [2022-11-23 15:33:09,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:33:09,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 101 [2022-11-23 15:33:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:09,941 INFO L225 Difference]: With dead ends: 10230 [2022-11-23 15:33:09,941 INFO L226 Difference]: Without dead ends: 6644 [2022-11-23 15:33:09,956 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:33:09,956 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 83 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:09,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 563 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:33:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6644 states. [2022-11-23 15:33:10,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6644 to 6260. [2022-11-23 15:33:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6260 states, 5072 states have (on average 1.449723974763407) internal successors, (7353), 5107 states have internal predecessors, (7353), 783 states have call successors, (783), 410 states have call predecessors, (783), 403 states have return successors, (1082), 744 states have call predecessors, (1082), 782 states have call successors, (1082) [2022-11-23 15:33:10,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6260 states to 6260 states and 9218 transitions. [2022-11-23 15:33:10,779 INFO L78 Accepts]: Start accepts. Automaton has 6260 states and 9218 transitions. Word has length 101 [2022-11-23 15:33:10,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:10,779 INFO L495 AbstractCegarLoop]: Abstraction has 6260 states and 9218 transitions. [2022-11-23 15:33:10,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 15:33:10,780 INFO L276 IsEmpty]: Start isEmpty. Operand 6260 states and 9218 transitions. [2022-11-23 15:33:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-23 15:33:10,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:10,791 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:10,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 15:33:10,791 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:10,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:10,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1667601710, now seen corresponding path program 1 times [2022-11-23 15:33:10,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:10,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857389050] [2022-11-23 15:33:10,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:10,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 15:33:10,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:10,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857389050] [2022-11-23 15:33:10,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857389050] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:10,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304061903] [2022-11-23 15:33:10,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:10,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:10,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:10,979 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:10,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:33:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:11,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 15:33:11,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:33:11,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:33:11,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304061903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:11,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:33:11,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-23 15:33:11,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575411909] [2022-11-23 15:33:11,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:11,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:33:11,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:11,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:33:11,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:33:11,223 INFO L87 Difference]: Start difference. First operand 6260 states and 9218 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:33:12,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:12,096 INFO L93 Difference]: Finished difference Result 7046 states and 10113 transitions. [2022-11-23 15:33:12,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:33:12,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-23 15:33:12,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:12,119 INFO L225 Difference]: With dead ends: 7046 [2022-11-23 15:33:12,120 INFO L226 Difference]: Without dead ends: 5988 [2022-11-23 15:33:12,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:33:12,125 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 72 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:12,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1102 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:33:12,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5988 states. [2022-11-23 15:33:12,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5988 to 5870. [2022-11-23 15:33:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5870 states, 4792 states have (on average 1.4657762938230383) internal successors, (7024), 4821 states have internal predecessors, (7024), 724 states have call successors, (724), 355 states have call predecessors, (724), 352 states have return successors, (1013), 695 states have call predecessors, (1013), 723 states have call successors, (1013) [2022-11-23 15:33:12,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5870 states to 5870 states and 8761 transitions. [2022-11-23 15:33:12,807 INFO L78 Accepts]: Start accepts. Automaton has 5870 states and 8761 transitions. Word has length 112 [2022-11-23 15:33:12,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:12,810 INFO L495 AbstractCegarLoop]: Abstraction has 5870 states and 8761 transitions. [2022-11-23 15:33:12,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:33:12,810 INFO L276 IsEmpty]: Start isEmpty. Operand 5870 states and 8761 transitions. [2022-11-23 15:33:12,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 15:33:12,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:12,825 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:12,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-23 15:33:13,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 15:33:13,031 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:13,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:13,032 INFO L85 PathProgramCache]: Analyzing trace with hash 892190063, now seen corresponding path program 1 times [2022-11-23 15:33:13,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:13,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231813511] [2022-11-23 15:33:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:13,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 15:33:13,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:13,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231813511] [2022-11-23 15:33:13,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231813511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:13,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:13,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:33:13,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105136166] [2022-11-23 15:33:13,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:13,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:33:13,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:13,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:33:13,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:33:13,133 INFO L87 Difference]: Start difference. First operand 5870 states and 8761 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-23 15:33:14,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:14,236 INFO L93 Difference]: Finished difference Result 6363 states and 9319 transitions. [2022-11-23 15:33:14,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:33:14,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 113 [2022-11-23 15:33:14,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:14,262 INFO L225 Difference]: With dead ends: 6363 [2022-11-23 15:33:14,263 INFO L226 Difference]: Without dead ends: 5737 [2022-11-23 15:33:14,268 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:33:14,269 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 308 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:14,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 465 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:33:14,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5737 states. [2022-11-23 15:33:14,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5737 to 5690. [2022-11-23 15:33:14,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5690 states, 4664 states have (on average 1.474056603773585) internal successors, (6875), 4691 states have internal predecessors, (6875), 696 states have call successors, (696), 329 states have call predecessors, (696), 328 states have return successors, (983), 671 states have call predecessors, (983), 695 states have call successors, (983) [2022-11-23 15:33:14,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5690 states to 5690 states and 8554 transitions. [2022-11-23 15:33:14,902 INFO L78 Accepts]: Start accepts. Automaton has 5690 states and 8554 transitions. Word has length 113 [2022-11-23 15:33:14,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:14,903 INFO L495 AbstractCegarLoop]: Abstraction has 5690 states and 8554 transitions. [2022-11-23 15:33:14,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-23 15:33:14,903 INFO L276 IsEmpty]: Start isEmpty. Operand 5690 states and 8554 transitions. [2022-11-23 15:33:14,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 15:33:14,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:14,913 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:14,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 15:33:14,913 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:14,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:14,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1849118446, now seen corresponding path program 1 times [2022-11-23 15:33:14,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:14,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860697761] [2022-11-23 15:33:14,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:14,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:15,054 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-23 15:33:15,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:15,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860697761] [2022-11-23 15:33:15,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860697761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:15,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663607169] [2022-11-23 15:33:15,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:15,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:15,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:15,056 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:15,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:33:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:15,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:33:15,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 15:33:15,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:33:15,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663607169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:15,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:33:15,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-23 15:33:15,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986233764] [2022-11-23 15:33:15,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:15,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:33:15,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:15,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:33:15,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:33:15,285 INFO L87 Difference]: Start difference. First operand 5690 states and 8554 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 15:33:16,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:16,144 INFO L93 Difference]: Finished difference Result 6439 states and 9399 transitions. [2022-11-23 15:33:16,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:33:16,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-23 15:33:16,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:16,166 INFO L225 Difference]: With dead ends: 6439 [2022-11-23 15:33:16,167 INFO L226 Difference]: Without dead ends: 5982 [2022-11-23 15:33:16,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:33:16,171 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 239 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:16,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 1155 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:33:16,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5982 states. [2022-11-23 15:33:16,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5982 to 5948. [2022-11-23 15:33:16,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5948 states, 4826 states have (on average 1.4618731869042685) internal successors, (7055), 4859 states have internal predecessors, (7055), 744 states have call successors, (744), 371 states have call predecessors, (744), 376 states have return successors, (1043), 719 states have call predecessors, (1043), 743 states have call successors, (1043) [2022-11-23 15:33:16,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5948 states to 5948 states and 8842 transitions. [2022-11-23 15:33:16,753 INFO L78 Accepts]: Start accepts. Automaton has 5948 states and 8842 transitions. Word has length 113 [2022-11-23 15:33:16,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:16,754 INFO L495 AbstractCegarLoop]: Abstraction has 5948 states and 8842 transitions. [2022-11-23 15:33:16,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 15:33:16,754 INFO L276 IsEmpty]: Start isEmpty. Operand 5948 states and 8842 transitions. [2022-11-23 15:33:16,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-23 15:33:16,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:16,765 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:16,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:16,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:16,970 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:16,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:16,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1204142891, now seen corresponding path program 1 times [2022-11-23 15:33:16,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:16,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393514556] [2022-11-23 15:33:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:16,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 15:33:17,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:17,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393514556] [2022-11-23 15:33:17,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393514556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:17,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832965204] [2022-11-23 15:33:17,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:17,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:17,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:17,841 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:17,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:33:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:17,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-23 15:33:18,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:33:19,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:33:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 15:33:20,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832965204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:33:20,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2112619108] [2022-11-23 15:33:20,968 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-23 15:33:20,968 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:33:20,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:33:20,969 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:33:20,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:34:06,966 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 272 for LOIs [2022-11-23 15:34:07,414 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 223 for LOIs [2022-11-23 15:34:07,473 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 214 for LOIs [2022-11-23 15:34:07,535 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 284 for LOIs [2022-11-23 15:34:09,419 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 162 for LOIs [2022-11-23 15:34:09,662 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 108 for LOIs [2022-11-23 15:34:09,879 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 276 for LOIs [2022-11-23 15:34:10,345 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 299 for LOIs [2022-11-23 15:34:10,782 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:35:15,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '188237#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t4_i~0 0) (= ~T7_E~0 2) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (= ~E_2~0 2) (<= ~E_6~0 2) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 15:35:15,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:35:15,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:35:15,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-11-23 15:35:15,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098399799] [2022-11-23 15:35:15,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:35:15,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-23 15:35:15,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:35:15,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-23 15:35:15,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=10774, Unknown=0, NotChecked=0, Total=11556 [2022-11-23 15:35:15,619 INFO L87 Difference]: Start difference. First operand 5948 states and 8842 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-23 15:35:41,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:35:41,542 INFO L93 Difference]: Finished difference Result 8461 states and 11760 transitions. [2022-11-23 15:35:41,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-11-23 15:35:41,543 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2022-11-23 15:35:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:35:41,574 INFO L225 Difference]: With dead ends: 8461 [2022-11-23 15:35:41,574 INFO L226 Difference]: Without dead ends: 7743 [2022-11-23 15:35:41,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 288 SyntacticMatches, 4 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44669 ImplicationChecksByTransitivity, 84.5s TimeCoverageRelationStatistics Valid=10069, Invalid=99823, Unknown=0, NotChecked=0, Total=109892 [2022-11-23 15:35:41,598 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 5235 mSDsluCounter, 2779 mSDsCounter, 0 mSdLazyCounter, 7704 mSolverCounterSat, 2713 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5235 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 10417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2713 IncrementalHoareTripleChecker+Valid, 7704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:35:41,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5235 Valid, 2994 Invalid, 10417 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2713 Valid, 7704 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-23 15:35:41,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7743 states. [2022-11-23 15:35:42,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7743 to 6223. [2022-11-23 15:35:42,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6223 states, 5009 states have (on average 1.450189658614494) internal successors, (7264), 5044 states have internal predecessors, (7264), 789 states have call successors, (789), 408 states have call predecessors, (789), 423 states have return successors, (1100), 772 states have call predecessors, (1100), 788 states have call successors, (1100) [2022-11-23 15:35:42,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6223 states to 6223 states and 9153 transitions. [2022-11-23 15:35:42,511 INFO L78 Accepts]: Start accepts. Automaton has 6223 states and 9153 transitions. Word has length 114 [2022-11-23 15:35:42,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:35:42,512 INFO L495 AbstractCegarLoop]: Abstraction has 6223 states and 9153 transitions. [2022-11-23 15:35:42,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-23 15:35:42,512 INFO L276 IsEmpty]: Start isEmpty. Operand 6223 states and 9153 transitions. [2022-11-23 15:35:42,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 15:35:42,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:35:42,524 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:35:42,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:35:42,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-23 15:35:42,731 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:35:42,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:35:42,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2135928949, now seen corresponding path program 1 times [2022-11-23 15:35:42,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:35:42,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611619079] [2022-11-23 15:35:42,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:35:42,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:35:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:35:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:35:43,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:35:43,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611619079] [2022-11-23 15:35:43,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611619079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:35:43,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421592726] [2022-11-23 15:35:43,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:35:43,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:35:43,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:35:43,160 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:35:43,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:35:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:35:43,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 15:35:43,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:35:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 15:35:43,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:35:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 15:35:43,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421592726] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:35:43,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:35:43,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-23 15:35:43,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405716494] [2022-11-23 15:35:43,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:35:43,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:35:43,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:35:43,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:35:43,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-23 15:35:43,667 INFO L87 Difference]: Start difference. First operand 6223 states and 9153 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 15:35:45,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:35:45,172 INFO L93 Difference]: Finished difference Result 7547 states and 10701 transitions. [2022-11-23 15:35:45,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 15:35:45,179 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-23 15:35:45,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:35:45,213 INFO L225 Difference]: With dead ends: 7547 [2022-11-23 15:35:45,213 INFO L226 Difference]: Without dead ends: 6556 [2022-11-23 15:35:45,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-23 15:35:45,221 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 407 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:35:45,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 512 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:35:45,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6556 states. [2022-11-23 15:35:46,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6556 to 6303. [2022-11-23 15:35:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6303 states, 5054 states have (on average 1.4473684210526316) internal successors, (7315), 5092 states have internal predecessors, (7315), 808 states have call successors, (808), 417 states have call predecessors, (808), 439 states have return successors, (1140), 795 states have call predecessors, (1140), 807 states have call successors, (1140) [2022-11-23 15:35:46,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6303 states to 6303 states and 9263 transitions. [2022-11-23 15:35:46,336 INFO L78 Accepts]: Start accepts. Automaton has 6303 states and 9263 transitions. Word has length 115 [2022-11-23 15:35:46,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:35:46,336 INFO L495 AbstractCegarLoop]: Abstraction has 6303 states and 9263 transitions. [2022-11-23 15:35:46,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 15:35:46,337 INFO L276 IsEmpty]: Start isEmpty. Operand 6303 states and 9263 transitions. [2022-11-23 15:35:46,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 15:35:46,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:35:46,351 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:35:46,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:35:46,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:35:46,558 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:35:46,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:35:46,559 INFO L85 PathProgramCache]: Analyzing trace with hash -795443035, now seen corresponding path program 1 times [2022-11-23 15:35:46,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:35:46,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329067897] [2022-11-23 15:35:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:35:46,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:35:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:35:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 15:35:47,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:35:47,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329067897] [2022-11-23 15:35:47,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329067897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:35:47,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291121232] [2022-11-23 15:35:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:35:47,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:35:47,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:35:47,631 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:35:47,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:35:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:35:47,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-23 15:35:47,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:35:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:35:48,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:35:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 15:35:50,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291121232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:35:50,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1250734278] [2022-11-23 15:35:50,802 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-23 15:35:50,803 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:35:50,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:35:50,803 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:35:50,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:36:03,098 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 272 for LOIs [2022-11-23 15:36:03,811 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 222 for LOIs [2022-11-23 15:36:03,867 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 110 for LOIs [2022-11-23 15:36:03,880 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 284 for LOIs [2022-11-23 15:36:06,108 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 162 for LOIs [2022-11-23 15:36:06,412 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 110 for LOIs [2022-11-23 15:36:06,695 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 276 for LOIs [2022-11-23 15:36:07,301 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 299 for LOIs [2022-11-23 15:36:07,767 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:37:14,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '231139#(and (= ~q_req_up~0 1) (or (and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~E_1~0 2) (= ~M_E~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0)) (and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~p_dw_pc~0 1) (= ~E_2~0 2) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (= 2 ~p_dw_st~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~E_1~0 2) (= ~M_E~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0))) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (<= ~c_num_read~0 1) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= 0 ~t3_pc~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0))' at error location [2022-11-23 15:37:14,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:37:14,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:37:14,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-11-23 15:37:14,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243402365] [2022-11-23 15:37:14,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:37:14,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-23 15:37:14,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:37:14,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-23 15:37:14,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=953, Invalid=11703, Unknown=0, NotChecked=0, Total=12656 [2022-11-23 15:37:14,707 INFO L87 Difference]: Start difference. First operand 6303 states and 9263 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-23 15:37:36,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:37:36,168 INFO L93 Difference]: Finished difference Result 8587 states and 11965 transitions. [2022-11-23 15:37:36,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-11-23 15:37:36,171 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2022-11-23 15:37:36,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:37:36,197 INFO L225 Difference]: With dead ends: 8587 [2022-11-23 15:37:36,197 INFO L226 Difference]: Without dead ends: 7516 [2022-11-23 15:37:36,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 321 SyntacticMatches, 1 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26843 ImplicationChecksByTransitivity, 79.9s TimeCoverageRelationStatistics Valid=6751, Invalid=62681, Unknown=0, NotChecked=0, Total=69432 [2022-11-23 15:37:36,207 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 6036 mSDsluCounter, 3165 mSDsCounter, 0 mSdLazyCounter, 9218 mSolverCounterSat, 3887 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6036 SdHoareTripleChecker+Valid, 3373 SdHoareTripleChecker+Invalid, 13105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3887 IncrementalHoareTripleChecker+Valid, 9218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:37:36,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6036 Valid, 3373 Invalid, 13105 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3887 Valid, 9218 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-11-23 15:37:36,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2022-11-23 15:37:37,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 6119. [2022-11-23 15:37:37,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6119 states, 4942 states have (on average 1.4542695265074868) internal successors, (7187), 4979 states have internal predecessors, (7187), 768 states have call successors, (768), 385 states have call predecessors, (768), 407 states have return successors, (1090), 756 states have call predecessors, (1090), 767 states have call successors, (1090) [2022-11-23 15:37:37,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6119 states to 6119 states and 9045 transitions. [2022-11-23 15:37:37,357 INFO L78 Accepts]: Start accepts. Automaton has 6119 states and 9045 transitions. Word has length 124 [2022-11-23 15:37:37,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:37:37,357 INFO L495 AbstractCegarLoop]: Abstraction has 6119 states and 9045 transitions. [2022-11-23 15:37:37,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-23 15:37:37,358 INFO L276 IsEmpty]: Start isEmpty. Operand 6119 states and 9045 transitions. [2022-11-23 15:37:37,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 15:37:37,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:37:37,368 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:37:37,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:37:37,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-23 15:37:37,574 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:37:37,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:37:37,574 INFO L85 PathProgramCache]: Analyzing trace with hash 659710019, now seen corresponding path program 1 times [2022-11-23 15:37:37,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:37:37,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608185323] [2022-11-23 15:37:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:37:37,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:37:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:37:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 15:37:37,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:37:37,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608185323] [2022-11-23 15:37:37,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608185323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:37:37,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028069451] [2022-11-23 15:37:37,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:37:37,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:37:37,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:37:37,817 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:37:37,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 15:37:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:37:37,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 15:37:37,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:37:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 15:37:38,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:37:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 15:37:38,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028069451] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:37:38,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:37:38,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-23 15:37:38,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711885877] [2022-11-23 15:37:38,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:37:38,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:37:38,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:37:38,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:37:38,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:37:38,406 INFO L87 Difference]: Start difference. First operand 6119 states and 9045 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 15:37:40,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:37:40,126 INFO L93 Difference]: Finished difference Result 6774 states and 9786 transitions. [2022-11-23 15:37:40,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 15:37:40,127 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-23 15:37:40,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:37:40,151 INFO L225 Difference]: With dead ends: 6774 [2022-11-23 15:37:40,151 INFO L226 Difference]: Without dead ends: 5887 [2022-11-23 15:37:40,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-23 15:37:40,158 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 548 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:37:40,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 597 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 15:37:40,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5887 states. [2022-11-23 15:37:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5887 to 5850. [2022-11-23 15:37:41,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5850 states, 4743 states have (on average 1.4636306135357369) internal successors, (6942), 4780 states have internal predecessors, (6942), 732 states have call successors, (732), 355 states have call predecessors, (732), 373 states have return successors, (1049), 716 states have call predecessors, (1049), 731 states have call successors, (1049) [2022-11-23 15:37:41,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5850 states to 5850 states and 8723 transitions. [2022-11-23 15:37:41,358 INFO L78 Accepts]: Start accepts. Automaton has 5850 states and 8723 transitions. Word has length 125 [2022-11-23 15:37:41,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:37:41,359 INFO L495 AbstractCegarLoop]: Abstraction has 5850 states and 8723 transitions. [2022-11-23 15:37:41,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 15:37:41,359 INFO L276 IsEmpty]: Start isEmpty. Operand 5850 states and 8723 transitions. [2022-11-23 15:37:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-23 15:37:41,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:37:41,370 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:37:41,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-23 15:37:41,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 15:37:41,585 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:37:41,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:37:41,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2137145289, now seen corresponding path program 1 times [2022-11-23 15:37:41,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:37:41,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703614407] [2022-11-23 15:37:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:37:41,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:37:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:37:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-23 15:37:41,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:37:41,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703614407] [2022-11-23 15:37:41,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703614407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:37:41,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:37:41,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:37:41,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182482502] [2022-11-23 15:37:41,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:37:41,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:37:41,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:37:41,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:37:41,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:37:41,682 INFO L87 Difference]: Start difference. First operand 5850 states and 8723 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 15:37:43,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:37:43,551 INFO L93 Difference]: Finished difference Result 15903 states and 24764 transitions. [2022-11-23 15:37:43,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:37:43,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-23 15:37:43,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:37:43,595 INFO L225 Difference]: With dead ends: 15903 [2022-11-23 15:37:43,595 INFO L226 Difference]: Without dead ends: 10788 [2022-11-23 15:37:43,617 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:37:43,618 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 246 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:37:43,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 402 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:37:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10788 states. [2022-11-23 15:37:45,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10788 to 10730. [2022-11-23 15:37:45,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10730 states, 8795 states have (on average 1.4724275156338829) internal successors, (12950), 8856 states have internal predecessors, (12950), 1304 states have call successors, (1304), 611 states have call predecessors, (1304), 629 states have return successors, (1877), 1264 states have call predecessors, (1877), 1303 states have call successors, (1877) [2022-11-23 15:37:45,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10730 states to 10730 states and 16131 transitions. [2022-11-23 15:37:45,187 INFO L78 Accepts]: Start accepts. Automaton has 10730 states and 16131 transitions. Word has length 136 [2022-11-23 15:37:45,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:37:45,188 INFO L495 AbstractCegarLoop]: Abstraction has 10730 states and 16131 transitions. [2022-11-23 15:37:45,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 15:37:45,188 INFO L276 IsEmpty]: Start isEmpty. Operand 10730 states and 16131 transitions. [2022-11-23 15:37:45,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-23 15:37:45,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:37:45,205 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:37:45,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-23 15:37:45,205 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:37:45,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:37:45,206 INFO L85 PathProgramCache]: Analyzing trace with hash -534157951, now seen corresponding path program 1 times [2022-11-23 15:37:45,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:37:45,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341271326] [2022-11-23 15:37:45,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:37:45,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:37:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:37:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-23 15:37:45,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:37:45,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341271326] [2022-11-23 15:37:45,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341271326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:37:45,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:37:45,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:37:45,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598950986] [2022-11-23 15:37:45,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:37:45,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:37:45,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:37:45,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:37:45,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:37:45,293 INFO L87 Difference]: Start difference. First operand 10730 states and 16131 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 15:37:48,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:37:48,086 INFO L93 Difference]: Finished difference Result 30367 states and 47144 transitions. [2022-11-23 15:37:48,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:37:48,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-23 15:37:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:37:48,166 INFO L225 Difference]: With dead ends: 30367 [2022-11-23 15:37:48,166 INFO L226 Difference]: Without dead ends: 20372 [2022-11-23 15:37:48,210 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:37:48,211 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 248 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:37:48,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 402 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:37:48,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20372 states. [2022-11-23 15:37:50,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20372 to 20258. [2022-11-23 15:37:50,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20258 states, 16707 states have (on average 1.4713593104686657) internal successors, (24582), 16816 states have internal predecessors, (24582), 2408 states have call successors, (2408), 1123 states have call predecessors, (2408), 1141 states have return successors, (3461), 2320 states have call predecessors, (3461), 2407 states have call successors, (3461) [2022-11-23 15:37:50,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20258 states to 20258 states and 30451 transitions. [2022-11-23 15:37:51,001 INFO L78 Accepts]: Start accepts. Automaton has 20258 states and 30451 transitions. Word has length 136 [2022-11-23 15:37:51,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:37:51,002 INFO L495 AbstractCegarLoop]: Abstraction has 20258 states and 30451 transitions. [2022-11-23 15:37:51,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 15:37:51,002 INFO L276 IsEmpty]: Start isEmpty. Operand 20258 states and 30451 transitions. [2022-11-23 15:37:51,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-23 15:37:51,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:37:51,035 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:37:51,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-23 15:37:51,036 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:37:51,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:37:51,036 INFO L85 PathProgramCache]: Analyzing trace with hash 399066693, now seen corresponding path program 1 times [2022-11-23 15:37:51,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:37:51,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409702571] [2022-11-23 15:37:51,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:37:51,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:37:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:37:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-23 15:37:51,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:37:51,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409702571] [2022-11-23 15:37:51,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409702571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:37:51,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:37:51,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:37:51,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885795744] [2022-11-23 15:37:51,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:37:51,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:37:51,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:37:51,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:37:51,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:37:51,124 INFO L87 Difference]: Start difference. First operand 20258 states and 30451 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 15:37:56,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:37:56,678 INFO L93 Difference]: Finished difference Result 58599 states and 90344 transitions. [2022-11-23 15:37:56,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:37:56,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-23 15:37:56,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:37:56,801 INFO L225 Difference]: With dead ends: 58599 [2022-11-23 15:37:56,801 INFO L226 Difference]: Without dead ends: 39076 [2022-11-23 15:37:56,856 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:37:56,857 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 251 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:37:56,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 402 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:37:56,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39076 states. [2022-11-23 15:38:02,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39076 to 38850. [2022-11-23 15:38:02,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38850 states, 32147 states have (on average 1.4644601362491056) internal successors, (47078), 32352 states have internal predecessors, (47078), 4536 states have call successors, (4536), 2147 states have call predecessors, (4536), 2165 states have return successors, (6485), 4352 states have call predecessors, (6485), 4535 states have call successors, (6485) [2022-11-23 15:38:02,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38850 states to 38850 states and 58099 transitions. [2022-11-23 15:38:02,830 INFO L78 Accepts]: Start accepts. Automaton has 38850 states and 58099 transitions. Word has length 136 [2022-11-23 15:38:02,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:38:02,830 INFO L495 AbstractCegarLoop]: Abstraction has 38850 states and 58099 transitions. [2022-11-23 15:38:02,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 15:38:02,831 INFO L276 IsEmpty]: Start isEmpty. Operand 38850 states and 58099 transitions. [2022-11-23 15:38:02,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-23 15:38:02,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:38:02,940 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-23 15:38:02,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-23 15:38:02,940 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:38:02,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:38:02,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1107251036, now seen corresponding path program 1 times [2022-11-23 15:38:02,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:38:02,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090766240] [2022-11-23 15:38:02,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:38:02,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:38:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:38:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-23 15:38:03,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:38:03,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090766240] [2022-11-23 15:38:03,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090766240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:38:03,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591115050] [2022-11-23 15:38:03,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:38:03,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:38:03,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:38:03,093 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:38:03,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 15:38:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:38:03,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:38:03,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:38:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 15:38:03,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:38:03,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591115050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:38:03,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:38:03,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 15:38:03,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462857869] [2022-11-23 15:38:03,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:38:03,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:38:03,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:38:03,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:38:03,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:38:03,425 INFO L87 Difference]: Start difference. First operand 38850 states and 58099 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:38:10,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:38:10,720 INFO L93 Difference]: Finished difference Result 71869 states and 107304 transitions. [2022-11-23 15:38:10,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:38:10,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 156 [2022-11-23 15:38:10,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:38:11,038 INFO L225 Difference]: With dead ends: 71869 [2022-11-23 15:38:11,038 INFO L226 Difference]: Without dead ends: 49339 [2022-11-23 15:38:11,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:38:11,108 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 243 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:38:11,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 303 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:38:11,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49339 states. [2022-11-23 15:38:18,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49339 to 49339. [2022-11-23 15:38:18,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49339 states, 41681 states have (on average 1.4165687003670737) internal successors, (59044), 41886 states have internal predecessors, (59044), 4853 states have call successors, (4853), 2784 states have call predecessors, (4853), 2803 states have return successors, (7056), 4670 states have call predecessors, (7056), 4852 states have call successors, (7056) [2022-11-23 15:38:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49339 states to 49339 states and 70953 transitions. [2022-11-23 15:38:19,045 INFO L78 Accepts]: Start accepts. Automaton has 49339 states and 70953 transitions. Word has length 156 [2022-11-23 15:38:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:38:19,046 INFO L495 AbstractCegarLoop]: Abstraction has 49339 states and 70953 transitions. [2022-11-23 15:38:19,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:38:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 49339 states and 70953 transitions. [2022-11-23 15:38:19,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-23 15:38:19,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:38:19,184 INFO L195 NwaCegarLoop]: 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, 3, 3, 3, 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] [2022-11-23 15:38:19,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 15:38:19,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-23 15:38:19,385 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:38:19,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:38:19,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1630571707, now seen corresponding path program 1 times [2022-11-23 15:38:19,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:38:19,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653773666] [2022-11-23 15:38:19,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:38:19,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:38:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:38:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-23 15:38:19,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:38:19,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653773666] [2022-11-23 15:38:19,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653773666] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:38:19,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416481823] [2022-11-23 15:38:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:38:19,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:38:19,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:38:19,577 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:38:19,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f4353e8-4b30-4c7b-9171-8a1e7116f946/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 15:38:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:38:19,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:38:19,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:38:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 15:38:19,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:38:19,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416481823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:38:19,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:38:19,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 15:38:19,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290291232] [2022-11-23 15:38:19,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:38:19,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:38:19,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:38:19,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:38:19,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:38:19,874 INFO L87 Difference]: Start difference. First operand 49339 states and 70953 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)