./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS --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 aa38d95315e187ea5fe9b62230d938985648af7e7d892502233db02121b7b545 --- 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-8393723 [2022-11-19 07:44:19,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:44:19,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:44:19,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:44:19,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:44:19,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:44:19,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:44:19,544 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:44:19,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:44:19,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:44:19,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:44:19,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:44:19,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:44:19,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:44:19,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:44:19,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:44:19,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:44:19,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:44:19,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:44:19,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:44:19,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:44:19,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:44:19,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:44:19,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:44:19,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:44:19,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:44:19,595 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:44:19,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:44:19,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:44:19,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:44:19,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:44:19,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:44:19,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:44:19,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:44:19,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:44:19,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:44:19,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:44:19,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:44:19,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:44:19,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:44:19,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:44:19,610 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:44:19,664 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:44:19,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:44:19,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:44:19,665 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:44:19,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:44:19,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:44:19,667 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:44:19,668 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:44:19,668 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:44:19,668 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:44:19,669 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:44:19,670 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:44:19,670 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:44:19,670 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:44:19,670 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:44:19,671 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:44:19,671 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:44:19,671 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:44:19,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:44:19,673 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:44:19,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:44:19,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:44:19,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:44:19,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:44:19,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:44:19,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:44:19,675 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:44:19,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:44:19,675 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:44:19,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:44:19,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:44:19,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:44:19,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:44:19,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:44:19,677 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:44:19,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:44:19,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:44:19,678 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:44:19,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:44:19,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:44:19,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:44:19,679 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_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa38d95315e187ea5fe9b62230d938985648af7e7d892502233db02121b7b545 [2022-11-19 07:44:20,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:44:20,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:44:20,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:44:20,077 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:44:20,078 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:44:20,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c [2022-11-19 07:44:20,178 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/data/396c41242/8c531e8be2a445a1b2d87d4f3d3c202e/FLAGba878e55f [2022-11-19 07:44:21,150 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:44:21,151 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c [2022-11-19 07:44:21,212 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/data/396c41242/8c531e8be2a445a1b2d87d4f3d3c202e/FLAGba878e55f [2022-11-19 07:44:21,523 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/data/396c41242/8c531e8be2a445a1b2d87d4f3d3c202e [2022-11-19 07:44:21,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:44:21,528 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:44:21,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:44:21,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:44:21,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:44:21,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:21" (1/1) ... [2022-11-19 07:44:21,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25624ab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:21, skipping insertion in model container [2022-11-19 07:44:21,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:21" (1/1) ... [2022-11-19 07:44:21,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:44:21,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:44:24,454 WARN L234 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_c1c218dc-5a3f-4219-83cd-645effd24c8a/sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c[378560,378573] [2022-11-19 07:44:24,491 WARN L234 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_c1c218dc-5a3f-4219-83cd-645effd24c8a/sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c[383339,383352] [2022-11-19 07:44:24,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:44:24,824 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:44:26,132 WARN L234 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_c1c218dc-5a3f-4219-83cd-645effd24c8a/sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c[378560,378573] [2022-11-19 07:44:26,140 WARN L234 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_c1c218dc-5a3f-4219-83cd-645effd24c8a/sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c[383339,383352] [2022-11-19 07:44:26,157 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:44:26,223 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:44:26,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:26 WrapperNode [2022-11-19 07:44:26,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:44:26,225 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:44:26,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:44:26,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:44:26,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:26" (1/1) ... [2022-11-19 07:44:26,327 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:26" (1/1) ... [2022-11-19 07:44:26,721 INFO L138 Inliner]: procedures = 60, calls = 65, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 12967 [2022-11-19 07:44:26,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:44:26,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:44:26,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:44:26,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:44:26,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:26" (1/1) ... [2022-11-19 07:44:26,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:26" (1/1) ... [2022-11-19 07:44:26,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:26" (1/1) ... [2022-11-19 07:44:26,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:26" (1/1) ... [2022-11-19 07:44:27,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:26" (1/1) ... [2022-11-19 07:44:27,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:26" (1/1) ... [2022-11-19 07:44:27,404 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:26" (1/1) ... [2022-11-19 07:44:27,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:26" (1/1) ... [2022-11-19 07:44:27,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:44:27,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:44:27,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:44:27,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:44:27,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:26" (1/1) ... [2022-11-19 07:44:27,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:44:27,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:27,649 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:44:27,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:44:27,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:44:27,753 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-19 07:44:27,753 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-19 07:44:27,753 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 07:44:27,753 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 07:44:27,754 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-19 07:44:27,754 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-19 07:44:27,754 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-19 07:44:27,754 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-19 07:44:27,754 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-19 07:44:27,754 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-19 07:44:27,755 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-19 07:44:27,755 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-19 07:44:27,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:44:27,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:44:27,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:44:27,961 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:44:27,964 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:44:37,290 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:44:39,856 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:44:39,856 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-11-19 07:44:39,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:39 BoogieIcfgContainer [2022-11-19 07:44:39,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:44:39,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:44:39,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:44:39,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:44:39,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:44:21" (1/3) ... [2022-11-19 07:44:39,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69da8937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:39, skipping insertion in model container [2022-11-19 07:44:39,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:26" (2/3) ... [2022-11-19 07:44:39,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69da8937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:39, skipping insertion in model container [2022-11-19 07:44:39,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:39" (3/3) ... [2022-11-19 07:44:39,877 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.08.cil-1.c [2022-11-19 07:44:39,897 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:44:39,897 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 07:44:40,006 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:44:40,014 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;@1a5dfbda, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:44:40,014 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 07:44:40,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 1787 states, 1756 states have (on average 1.964123006833713) internal successors, (3449), 1759 states have internal predecessors, (3449), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-19 07:44:40,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 07:44:40,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:40,041 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, 1, 1, 1] [2022-11-19 07:44:40,042 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:40,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:40,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1761736009, now seen corresponding path program 1 times [2022-11-19 07:44:40,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:40,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150549067] [2022-11-19 07:44:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:40,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:40,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:40,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150549067] [2022-11-19 07:44:40,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150549067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:40,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:44:40,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:44:40,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269380581] [2022-11-19 07:44:40,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:40,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:44:40,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:40,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:44:40,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:44:40,622 INFO L87 Difference]: Start difference. First operand has 1787 states, 1756 states have (on average 1.964123006833713) internal successors, (3449), 1759 states have internal predecessors, (3449), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2022-11-19 07:44:42,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:42,220 INFO L93 Difference]: Finished difference Result 3701 states and 7203 transitions. [2022-11-19 07:44:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:44:42,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 55 [2022-11-19 07:44:42,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:42,260 INFO L225 Difference]: With dead ends: 3701 [2022-11-19 07:44:42,260 INFO L226 Difference]: Without dead ends: 1913 [2022-11-19 07:44:42,271 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 [2022-11-19 07:44:42,277 INFO L413 NwaCegarLoop]: 3391 mSDtfsCounter, 3647 mSDsluCounter, 3309 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3647 SdHoareTripleChecker+Valid, 6700 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:42,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3647 Valid, 6700 Invalid, 676 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 07:44:42,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2022-11-19 07:44:42,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1912. [2022-11-19 07:44:42,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1858 states have (on average 1.9332615715823467) internal successors, (3592), 1861 states have internal predecessors, (3592), 40 states have call successors, (40), 12 states have call predecessors, (40), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-19 07:44:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 3672 transitions. [2022-11-19 07:44:42,442 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 3672 transitions. Word has length 55 [2022-11-19 07:44:42,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:42,443 INFO L495 AbstractCegarLoop]: Abstraction has 1912 states and 3672 transitions. [2022-11-19 07:44:42,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2022-11-19 07:44:42,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 3672 transitions. [2022-11-19 07:44:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-19 07:44:42,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:42,457 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, 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] [2022-11-19 07:44:42,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:44:42,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:42,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:42,458 INFO L85 PathProgramCache]: Analyzing trace with hash 267161106, now seen corresponding path program 1 times [2022-11-19 07:44:42,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:42,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305814478] [2022-11-19 07:44:42,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:42,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:44:42,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:42,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305814478] [2022-11-19 07:44:42,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305814478] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:42,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050640696] [2022-11-19 07:44:42,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:42,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:42,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:42,818 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:42,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:44:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:43,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:44:43,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:44:43,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:44:43,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050640696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:43,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:44:43,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:44:43,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204359057] [2022-11-19 07:44:43,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:43,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:44:43,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:43,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:44:43,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:44:43,187 INFO L87 Difference]: Start difference. First operand 1912 states and 3672 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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) [2022-11-19 07:44:43,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:43,792 INFO L93 Difference]: Finished difference Result 2437 states and 4475 transitions. [2022-11-19 07:44:43,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:44:43,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 108 [2022-11-19 07:44:43,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:43,807 INFO L225 Difference]: With dead ends: 2437 [2022-11-19 07:44:43,807 INFO L226 Difference]: Without dead ends: 2171 [2022-11-19 07:44:43,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:44:43,810 INFO L413 NwaCegarLoop]: 3275 mSDtfsCounter, 3447 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3447 SdHoareTripleChecker+Valid, 3440 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:43,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3447 Valid, 3440 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:44:43,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2022-11-19 07:44:43,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2167. [2022-11-19 07:44:43,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2067 states have (on average 1.8872762457668117) internal successors, (3901), 2071 states have internal predecessors, (3901), 74 states have call successors, (74), 24 states have call predecessors, (74), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-19 07:44:43,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 4049 transitions. [2022-11-19 07:44:43,889 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 4049 transitions. Word has length 108 [2022-11-19 07:44:43,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:43,890 INFO L495 AbstractCegarLoop]: Abstraction has 2167 states and 4049 transitions. [2022-11-19 07:44:43,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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) [2022-11-19 07:44:43,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 4049 transitions. [2022-11-19 07:44:43,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-19 07:44:43,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:43,894 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, 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] [2022-11-19 07:44:43,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:44,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:44,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:44,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:44,102 INFO L85 PathProgramCache]: Analyzing trace with hash -592407630, now seen corresponding path program 1 times [2022-11-19 07:44:44,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:44,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620447239] [2022-11-19 07:44:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:44,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:44:44,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:44,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620447239] [2022-11-19 07:44:44,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620447239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:44,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548528525] [2022-11-19 07:44:44,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:44,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:44,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:44,327 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:44,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:44:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:44,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:44:44,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:44:44,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:44:44,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548528525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:44,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:44:44,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:44:44,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134159390] [2022-11-19 07:44:44,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:44,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:44:44,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:44,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:44:44,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:44:44,624 INFO L87 Difference]: Start difference. First operand 2167 states and 4049 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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) [2022-11-19 07:44:45,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:45,287 INFO L93 Difference]: Finished difference Result 3196 states and 5616 transitions. [2022-11-19 07:44:45,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:44:45,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 108 [2022-11-19 07:44:45,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:45,312 INFO L225 Difference]: With dead ends: 3196 [2022-11-19 07:44:45,312 INFO L226 Difference]: Without dead ends: 2675 [2022-11-19 07:44:45,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:44:45,317 INFO L413 NwaCegarLoop]: 3263 mSDtfsCounter, 3456 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3456 SdHoareTripleChecker+Valid, 3428 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:45,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3456 Valid, 3428 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:44:45,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2022-11-19 07:44:45,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 2669. [2022-11-19 07:44:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2669 states, 2479 states have (on average 1.81807180314643) internal successors, (4507), 2485 states have internal predecessors, (4507), 140 states have call successors, (140), 48 states have call predecessors, (140), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2022-11-19 07:44:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 4787 transitions. [2022-11-19 07:44:45,454 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 4787 transitions. Word has length 108 [2022-11-19 07:44:45,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:45,457 INFO L495 AbstractCegarLoop]: Abstraction has 2669 states and 4787 transitions. [2022-11-19 07:44:45,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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) [2022-11-19 07:44:45,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 4787 transitions. [2022-11-19 07:44:45,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-19 07:44:45,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:45,467 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, 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] [2022-11-19 07:44:45,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:45,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:45,674 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:45,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1233707538, now seen corresponding path program 1 times [2022-11-19 07:44:45,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:45,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769962301] [2022-11-19 07:44:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:45,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:44:45,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:45,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769962301] [2022-11-19 07:44:45,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769962301] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:45,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975503790] [2022-11-19 07:44:45,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:45,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:45,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:45,817 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:45,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:44:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:46,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:44:46,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 07:44:46,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:44:46,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975503790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:46,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:44:46,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:44:46,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599125288] [2022-11-19 07:44:46,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:46,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:44:46,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:46,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:44:46,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:44:46,089 INFO L87 Difference]: Start difference. First operand 2669 states and 4787 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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) [2022-11-19 07:44:46,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:46,734 INFO L93 Difference]: Finished difference Result 4690 states and 7848 transitions. [2022-11-19 07:44:46,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:44:46,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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 108 [2022-11-19 07:44:46,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:46,755 INFO L225 Difference]: With dead ends: 4690 [2022-11-19 07:44:46,755 INFO L226 Difference]: Without dead ends: 3667 [2022-11-19 07:44:46,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:44:46,766 INFO L413 NwaCegarLoop]: 3273 mSDtfsCounter, 3453 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3438 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:46,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3453 Valid, 3438 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:44:46,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3667 states. [2022-11-19 07:44:46,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3667 to 3657. [2022-11-19 07:44:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3657 states, 3291 states have (on average 1.7304770586447888) internal successors, (5695), 3301 states have internal predecessors, (5695), 268 states have call successors, (268), 96 states have call predecessors, (268), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2022-11-19 07:44:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3657 states to 3657 states and 6231 transitions. [2022-11-19 07:44:46,965 INFO L78 Accepts]: Start accepts. Automaton has 3657 states and 6231 transitions. Word has length 108 [2022-11-19 07:44:46,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:46,966 INFO L495 AbstractCegarLoop]: Abstraction has 3657 states and 6231 transitions. [2022-11-19 07:44:46,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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) [2022-11-19 07:44:46,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3657 states and 6231 transitions. [2022-11-19 07:44:46,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-19 07:44:46,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:46,973 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, 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] [2022-11-19 07:44:46,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:47,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:47,179 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:47,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:47,180 INFO L85 PathProgramCache]: Analyzing trace with hash 39464882, now seen corresponding path program 1 times [2022-11-19 07:44:47,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:47,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118250549] [2022-11-19 07:44:47,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:47,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:44:47,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:47,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118250549] [2022-11-19 07:44:47,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118250549] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:47,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438056047] [2022-11-19 07:44:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:47,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:47,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:47,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:47,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:44:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:47,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:44:47,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:44:47,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:44:47,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438056047] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:47,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:44:47,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:44:47,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914343100] [2022-11-19 07:44:47,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:47,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:44:47,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:47,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:44:47,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:44:47,764 INFO L87 Difference]: Start difference. First operand 3657 states and 6231 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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) [2022-11-19 07:44:48,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:48,413 INFO L93 Difference]: Finished difference Result 7630 states and 12212 transitions. [2022-11-19 07:44:48,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:44:48,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 108 [2022-11-19 07:44:48,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:48,446 INFO L225 Difference]: With dead ends: 7630 [2022-11-19 07:44:48,447 INFO L226 Difference]: Without dead ends: 5619 [2022-11-19 07:44:48,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:44:48,457 INFO L413 NwaCegarLoop]: 3246 mSDtfsCounter, 3441 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3441 SdHoareTripleChecker+Valid, 3411 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:48,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3441 Valid, 3411 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:44:48,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2022-11-19 07:44:48,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 5601. [2022-11-19 07:44:48,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5601 states, 4891 states have (on average 1.6403598446125536) internal successors, (8023), 4909 states have internal predecessors, (8023), 516 states have call successors, (516), 192 states have call predecessors, (516), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2022-11-19 07:44:48,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5601 states to 5601 states and 9055 transitions. [2022-11-19 07:44:48,717 INFO L78 Accepts]: Start accepts. Automaton has 5601 states and 9055 transitions. Word has length 108 [2022-11-19 07:44:48,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:48,717 INFO L495 AbstractCegarLoop]: Abstraction has 5601 states and 9055 transitions. [2022-11-19 07:44:48,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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) [2022-11-19 07:44:48,718 INFO L276 IsEmpty]: Start isEmpty. Operand 5601 states and 9055 transitions. [2022-11-19 07:44:48,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-19 07:44:48,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:48,727 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, 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] [2022-11-19 07:44:48,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:48,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:48,935 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:48,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:48,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1652888238, now seen corresponding path program 1 times [2022-11-19 07:44:48,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:48,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218866891] [2022-11-19 07:44:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:48,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 07:44:49,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:49,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218866891] [2022-11-19 07:44:49,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218866891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:49,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:44:49,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:44:49,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990464706] [2022-11-19 07:44:49,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:49,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:44:49,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:49,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:44:49,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:44:49,052 INFO L87 Difference]: Start difference. First operand 5601 states and 9055 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2022-11-19 07:44:49,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:49,861 INFO L93 Difference]: Finished difference Result 8675 states and 13712 transitions. [2022-11-19 07:44:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:44:49,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 108 [2022-11-19 07:44:49,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:49,919 INFO L225 Difference]: With dead ends: 8675 [2022-11-19 07:44:49,919 INFO L226 Difference]: Without dead ends: 6657 [2022-11-19 07:44:49,928 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 [2022-11-19 07:44:49,929 INFO L413 NwaCegarLoop]: 3324 mSDtfsCounter, 91 mSDsluCounter, 3238 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 6562 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:49,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 6562 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:44:49,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6657 states. [2022-11-19 07:44:50,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6657 to 6321. [2022-11-19 07:44:50,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6321 states, 5579 states have (on average 1.6502957519268686) internal successors, (9207), 5597 states have internal predecessors, (9207), 532 states have call successors, (532), 208 states have call predecessors, (532), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2022-11-19 07:44:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6321 states to 6321 states and 10271 transitions. [2022-11-19 07:44:50,218 INFO L78 Accepts]: Start accepts. Automaton has 6321 states and 10271 transitions. Word has length 108 [2022-11-19 07:44:50,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:50,218 INFO L495 AbstractCegarLoop]: Abstraction has 6321 states and 10271 transitions. [2022-11-19 07:44:50,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2022-11-19 07:44:50,219 INFO L276 IsEmpty]: Start isEmpty. Operand 6321 states and 10271 transitions. [2022-11-19 07:44:50,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 07:44:50,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:50,234 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, 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] [2022-11-19 07:44:50,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:44:50,234 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:50,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:50,235 INFO L85 PathProgramCache]: Analyzing trace with hash 763030762, now seen corresponding path program 1 times [2022-11-19 07:44:50,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:50,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135772146] [2022-11-19 07:44:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:50,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:44:50,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:50,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135772146] [2022-11-19 07:44:50,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135772146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:50,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:44:50,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:44:50,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823848089] [2022-11-19 07:44:50,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:50,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:44:50,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:50,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:44:50,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:44:50,353 INFO L87 Difference]: Start difference. First operand 6321 states and 10271 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2022-11-19 07:44:51,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:51,323 INFO L93 Difference]: Finished difference Result 15526 states and 24292 transitions. [2022-11-19 07:44:51,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:44:51,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 146 [2022-11-19 07:44:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:51,378 INFO L225 Difference]: With dead ends: 15526 [2022-11-19 07:44:51,378 INFO L226 Difference]: Without dead ends: 10851 [2022-11-19 07:44:51,392 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 [2022-11-19 07:44:51,393 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3443 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:51,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:44:51,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2022-11-19 07:44:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10801. [2022-11-19 07:44:51,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10801 states, 9355 states have (on average 1.5845002672367718) internal successors, (14823), 9389 states have internal predecessors, (14823), 1028 states have call successors, (1028), 416 states have call predecessors, (1028), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2022-11-19 07:44:51,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10801 states to 10801 states and 16879 transitions. [2022-11-19 07:44:51,913 INFO L78 Accepts]: Start accepts. Automaton has 10801 states and 16879 transitions. Word has length 146 [2022-11-19 07:44:51,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:51,914 INFO L495 AbstractCegarLoop]: Abstraction has 10801 states and 16879 transitions. [2022-11-19 07:44:51,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2022-11-19 07:44:51,915 INFO L276 IsEmpty]: Start isEmpty. Operand 10801 states and 16879 transitions. [2022-11-19 07:44:51,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 07:44:51,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:51,942 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, 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] [2022-11-19 07:44:51,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:44:51,943 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:51,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:51,943 INFO L85 PathProgramCache]: Analyzing trace with hash -196747726, now seen corresponding path program 1 times [2022-11-19 07:44:51,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:51,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338413000] [2022-11-19 07:44:51,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:51,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:44:52,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:52,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338413000] [2022-11-19 07:44:52,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338413000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:52,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:44:52,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:44:52,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272516414] [2022-11-19 07:44:52,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:52,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:44:52,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:52,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:44:52,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:44:52,078 INFO L87 Difference]: Start difference. First operand 10801 states and 16879 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2022-11-19 07:44:53,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:53,499 INFO L93 Difference]: Finished difference Result 28822 states and 44116 transitions. [2022-11-19 07:44:53,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:44:53,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 146 [2022-11-19 07:44:53,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:53,597 INFO L225 Difference]: With dead ends: 28822 [2022-11-19 07:44:53,597 INFO L226 Difference]: Without dead ends: 19667 [2022-11-19 07:44:53,633 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 [2022-11-19 07:44:53,634 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3445 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:53,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3445 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:44:53,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19667 states. [2022-11-19 07:44:54,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19667 to 19569. [2022-11-19 07:44:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19569 states, 16747 states have (on average 1.536693139069684) internal successors, (25735), 16813 states have internal predecessors, (25735), 1988 states have call successors, (1988), 832 states have call predecessors, (1988), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2022-11-19 07:44:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19569 states to 19569 states and 29711 transitions. [2022-11-19 07:44:55,009 INFO L78 Accepts]: Start accepts. Automaton has 19569 states and 29711 transitions. Word has length 146 [2022-11-19 07:44:55,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:55,009 INFO L495 AbstractCegarLoop]: Abstraction has 19569 states and 29711 transitions. [2022-11-19 07:44:55,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2022-11-19 07:44:55,010 INFO L276 IsEmpty]: Start isEmpty. Operand 19569 states and 29711 transitions. [2022-11-19 07:44:55,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 07:44:55,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:55,076 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, 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] [2022-11-19 07:44:55,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:44:55,076 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:55,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:55,077 INFO L85 PathProgramCache]: Analyzing trace with hash 434955493, now seen corresponding path program 1 times [2022-11-19 07:44:55,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:55,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11493281] [2022-11-19 07:44:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:55,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:44:55,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:55,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11493281] [2022-11-19 07:44:55,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11493281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:55,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:44:55,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:44:55,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606613811] [2022-11-19 07:44:55,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:55,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:44:55,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:55,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:44:55,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:44:55,230 INFO L87 Difference]: Start difference. First operand 19569 states and 29711 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2022-11-19 07:44:57,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:57,492 INFO L93 Difference]: Finished difference Result 54838 states and 82580 transitions. [2022-11-19 07:44:57,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:44:57,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 146 [2022-11-19 07:44:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:57,669 INFO L225 Difference]: With dead ends: 54838 [2022-11-19 07:44:57,669 INFO L226 Difference]: Without dead ends: 36915 [2022-11-19 07:44:57,747 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 [2022-11-19 07:44:57,749 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3447 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3447 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:57,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3447 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:44:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36915 states. [2022-11-19 07:44:59,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36915 to 36721. [2022-11-19 07:44:59,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36721 states, 31211 states have (on average 1.5032840985549967) internal successors, (46919), 31341 states have internal predecessors, (46919), 3844 states have call successors, (3844), 1664 states have call predecessors, (3844), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2022-11-19 07:44:59,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36721 states to 36721 states and 54607 transitions. [2022-11-19 07:44:59,741 INFO L78 Accepts]: Start accepts. Automaton has 36721 states and 54607 transitions. Word has length 146 [2022-11-19 07:44:59,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:59,742 INFO L495 AbstractCegarLoop]: Abstraction has 36721 states and 54607 transitions. [2022-11-19 07:44:59,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2022-11-19 07:44:59,742 INFO L276 IsEmpty]: Start isEmpty. Operand 36721 states and 54607 transitions. [2022-11-19 07:44:59,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 07:44:59,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:59,850 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, 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] [2022-11-19 07:44:59,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:44:59,851 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:59,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:59,852 INFO L85 PathProgramCache]: Analyzing trace with hash -943930221, now seen corresponding path program 1 times [2022-11-19 07:44:59,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:59,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226048943] [2022-11-19 07:44:59,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:59,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:44:59,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:59,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226048943] [2022-11-19 07:44:59,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226048943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:59,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:44:59,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:44:59,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650090131] [2022-11-19 07:44:59,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:59,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:44:59,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:59,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:44:59,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:44:59,971 INFO L87 Difference]: Start difference. First operand 36721 states and 54607 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2022-11-19 07:45:04,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:45:04,740 INFO L93 Difference]: Finished difference Result 105718 states and 157140 transitions. [2022-11-19 07:45:04,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:45:04,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 146 [2022-11-19 07:45:04,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:45:05,088 INFO L225 Difference]: With dead ends: 105718 [2022-11-19 07:45:05,088 INFO L226 Difference]: Without dead ends: 70643 [2022-11-19 07:45:05,196 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 [2022-11-19 07:45:05,197 INFO L413 NwaCegarLoop]: 3262 mSDtfsCounter, 3450 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3450 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:45:05,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3450 Valid, 3427 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:45:05,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70643 states. [2022-11-19 07:45:08,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70643 to 70257. [2022-11-19 07:45:08,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70257 states, 59499 states have (on average 1.4791341030941696) internal successors, (88007), 59757 states have internal predecessors, (88007), 7428 states have call successors, (7428), 3328 states have call predecessors, (7428), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2022-11-19 07:45:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70257 states to 70257 states and 102863 transitions. [2022-11-19 07:45:08,940 INFO L78 Accepts]: Start accepts. Automaton has 70257 states and 102863 transitions. Word has length 146 [2022-11-19 07:45:08,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:45:08,941 INFO L495 AbstractCegarLoop]: Abstraction has 70257 states and 102863 transitions. [2022-11-19 07:45:08,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2022-11-19 07:45:08,941 INFO L276 IsEmpty]: Start isEmpty. Operand 70257 states and 102863 transitions. [2022-11-19 07:45:09,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-19 07:45:09,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:45:09,287 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, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:45:09,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:45:09,288 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:45:09,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:45:09,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1301725436, now seen corresponding path program 1 times [2022-11-19 07:45:09,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:45:09,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014169834] [2022-11-19 07:45:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:45:09,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:45:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 19 proven. 59 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-19 07:45:10,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:45:10,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014169834] [2022-11-19 07:45:10,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014169834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:45:10,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704285071] [2022-11-19 07:45:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:45:10,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:10,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:45:10,350 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:45:10,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:45:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:10,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:45:10,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:45:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:45:10,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:45:10,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704285071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:45:10,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:45:10,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:45:10,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037339242] [2022-11-19 07:45:10,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:45:10,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:45:10,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:45:10,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:45:10,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:45:10,679 INFO L87 Difference]: Start difference. First operand 70257 states and 102863 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:45:15,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:45:15,206 INFO L93 Difference]: Finished difference Result 133109 states and 196305 transitions. [2022-11-19 07:45:15,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:45:15,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 167 [2022-11-19 07:45:15,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:45:15,647 INFO L225 Difference]: With dead ends: 133109 [2022-11-19 07:45:15,648 INFO L226 Difference]: Without dead ends: 98035 [2022-11-19 07:45:15,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:45:15,743 INFO L413 NwaCegarLoop]: 3363 mSDtfsCounter, 140 mSDsluCounter, 3240 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 6603 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:45:15,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 6603 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:45:15,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98035 states. [2022-11-19 07:45:20,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98035 to 85105. [2022-11-19 07:45:20,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85105 states, 73579 states have (on average 1.5196591418747196) internal successors, (111815), 73837 states have internal predecessors, (111815), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-11-19 07:45:20,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85105 states to 85105 states and 127439 transitions. [2022-11-19 07:45:20,540 INFO L78 Accepts]: Start accepts. Automaton has 85105 states and 127439 transitions. Word has length 167 [2022-11-19 07:45:20,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:45:20,541 INFO L495 AbstractCegarLoop]: Abstraction has 85105 states and 127439 transitions. [2022-11-19 07:45:20,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:45:20,541 INFO L276 IsEmpty]: Start isEmpty. Operand 85105 states and 127439 transitions. [2022-11-19 07:45:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-19 07:45:20,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:45:20,799 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, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:45:20,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:45:21,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:45:21,008 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:45:21,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:45:21,008 INFO L85 PathProgramCache]: Analyzing trace with hash 223370814, now seen corresponding path program 2 times [2022-11-19 07:45:21,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:45:21,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307568181] [2022-11-19 07:45:21,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:45:21,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:45:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 07:45:21,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:45:21,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307568181] [2022-11-19 07:45:21,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307568181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:45:21,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895135482] [2022-11-19 07:45:21,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:45:21,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:21,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:45:21,732 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:45:21,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1c218dc-5a3f-4219-83cd-645effd24c8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:45:21,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:45:21,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:45:21,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:45:21,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:45:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 07:45:22,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:45:22,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895135482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:45:22,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:45:22,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:45:22,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095275437] [2022-11-19 07:45:22,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:45:22,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:45:22,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:45:22,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:45:22,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:45:22,009 INFO L87 Difference]: Start difference. First operand 85105 states and 127439 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:45:26,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:45:26,085 INFO L93 Difference]: Finished difference Result 135285 states and 205777 transitions. [2022-11-19 07:45:26,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:45:26,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 167 [2022-11-19 07:45:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:45:26,395 INFO L225 Difference]: With dead ends: 135285 [2022-11-19 07:45:26,395 INFO L226 Difference]: Without dead ends: 85363 [2022-11-19 07:45:26,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:45:26,509 INFO L413 NwaCegarLoop]: 3385 mSDtfsCounter, 171 mSDsluCounter, 3223 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 6608 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:45:26,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 6608 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:45:26,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85363 states. [2022-11-19 07:45:30,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85363 to 84849. [2022-11-19 07:45:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84849 states, 73323 states have (on average 1.5075078761098155) internal successors, (110535), 73581 states have internal predecessors, (110535), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-11-19 07:45:30,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84849 states to 84849 states and 126159 transitions. [2022-11-19 07:45:30,733 INFO L78 Accepts]: Start accepts. Automaton has 84849 states and 126159 transitions. Word has length 167 [2022-11-19 07:45:30,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:45:30,734 INFO L495 AbstractCegarLoop]: Abstraction has 84849 states and 126159 transitions. [2022-11-19 07:45:30,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:45:30,735 INFO L276 IsEmpty]: Start isEmpty. Operand 84849 states and 126159 transitions.