./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0 --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 a30aa210ed4a7c8ee647a70aef136aef282e5eccb07388ecda6495e33bc30b6d --- 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-e04fb08 [2022-11-16 20:36:30,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:36:30,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:36:30,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:36:30,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:36:30,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:36:30,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:36:30,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:36:30,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:36:30,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:36:30,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:36:30,224 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:36:30,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:36:30,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:36:30,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:36:30,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:36:30,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:36:30,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:36:30,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:36:30,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:36:30,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:36:30,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:36:30,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:36:30,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:36:30,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:36:30,262 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:36:30,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:36:30,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:36:30,263 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:36:30,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:36:30,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:36:30,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:36:30,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:36:30,267 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:36:30,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:36:30,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:36:30,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:36:30,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:36:30,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:36:30,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:36:30,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:36:30,273 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:36:30,298 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:36:30,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:36:30,298 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:36:30,299 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:36:30,299 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:36:30,300 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:36:30,300 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:36:30,300 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:36:30,300 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:36:30,301 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:36:30,301 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:36:30,301 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:36:30,302 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:36:30,302 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:36:30,302 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:36:30,302 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:36:30,303 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:36:30,303 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:36:30,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:36:30,304 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:36:30,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:36:30,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:36:30,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:36:30,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:36:30,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:36:30,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:36:30,306 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:36:30,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:36:30,306 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:36:30,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:36:30,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:36:30,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:36:30,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:36:30,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:36:30,308 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:36:30,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:36:30,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:36:30,309 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:36:30,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:36:30,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:36:30,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:36:30,310 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_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a30aa210ed4a7c8ee647a70aef136aef282e5eccb07388ecda6495e33bc30b6d [2022-11-16 20:36:30,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:36:30,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:36:30,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:36:30,599 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:36:30,601 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:36:30,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c [2022-11-16 20:36:30,702 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/data/9b0a28c14/2a3a5bc7952e4489961cc068bc380b10/FLAG5b1a3ecf9 [2022-11-16 20:36:31,200 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:36:31,201 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c [2022-11-16 20:36:31,211 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/data/9b0a28c14/2a3a5bc7952e4489961cc068bc380b10/FLAG5b1a3ecf9 [2022-11-16 20:36:31,518 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/data/9b0a28c14/2a3a5bc7952e4489961cc068bc380b10 [2022-11-16 20:36:31,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:36:31,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:36:31,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:36:31,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:36:31,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:36:31,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:36:31" (1/1) ... [2022-11-16 20:36:31,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e78e9bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:31, skipping insertion in model container [2022-11-16 20:36:31,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:36:31" (1/1) ... [2022-11-16 20:36:31,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:36:31,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:36:31,923 WARN L229 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_6172cc84-518b-474d-ba27-edd33a452d0e/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c[14540,14553] [2022-11-16 20:36:31,927 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:36:31,944 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:36:32,036 WARN L229 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_6172cc84-518b-474d-ba27-edd33a452d0e/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c[14540,14553] [2022-11-16 20:36:32,037 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:36:32,052 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:36:32,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:32 WrapperNode [2022-11-16 20:36:32,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:36:32,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:36:32,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:36:32,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:36:32,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:32" (1/1) ... [2022-11-16 20:36:32,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:32" (1/1) ... [2022-11-16 20:36:32,110 INFO L138 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 477 [2022-11-16 20:36:32,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:36:32,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:36:32,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:36:32,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:36:32,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:32" (1/1) ... [2022-11-16 20:36:32,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:32" (1/1) ... [2022-11-16 20:36:32,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:32" (1/1) ... [2022-11-16 20:36:32,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:32" (1/1) ... [2022-11-16 20:36:32,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:32" (1/1) ... [2022-11-16 20:36:32,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:32" (1/1) ... [2022-11-16 20:36:32,143 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:32" (1/1) ... [2022-11-16 20:36:32,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:32" (1/1) ... [2022-11-16 20:36:32,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:36:32,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:36:32,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:36:32,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:36:32,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:32" (1/1) ... [2022-11-16 20:36:32,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:36:32,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:36:32,205 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:36:32,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:36:32,258 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2022-11-16 20:36:32,258 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2022-11-16 20:36:32,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:36:32,259 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2022-11-16 20:36:32,259 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2022-11-16 20:36:32,259 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-11-16 20:36:32,259 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-11-16 20:36:32,259 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2022-11-16 20:36:32,259 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2022-11-16 20:36:32,260 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 20:36:32,260 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 20:36:32,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:36:32,260 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2022-11-16 20:36:32,261 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2022-11-16 20:36:32,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:36:32,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:36:32,262 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2022-11-16 20:36:32,262 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2022-11-16 20:36:32,380 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:36:32,382 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:36:33,080 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:36:33,320 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:36:33,320 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 20:36:33,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:36:33 BoogieIcfgContainer [2022-11-16 20:36:33,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:36:33,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:36:33,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:36:33,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:36:33,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:36:31" (1/3) ... [2022-11-16 20:36:33,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d59db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:36:33, skipping insertion in model container [2022-11-16 20:36:33,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:32" (2/3) ... [2022-11-16 20:36:33,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d59db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:36:33, skipping insertion in model container [2022-11-16 20:36:33,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:36:33" (3/3) ... [2022-11-16 20:36:33,337 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c [2022-11-16 20:36:33,359 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:36:33,359 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:36:33,430 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:36:33,437 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;@60db6e1f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:36:33,437 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:36:33,442 INFO L276 IsEmpty]: Start isEmpty. Operand has 144 states, 104 states have (on average 1.5288461538461537) internal successors, (159), 105 states have internal predecessors, (159), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-16 20:36:33,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 20:36:33,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:36:33,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:36:33,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:36:33,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:36:33,461 INFO L85 PathProgramCache]: Analyzing trace with hash 331613024, now seen corresponding path program 1 times [2022-11-16 20:36:33,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:36:33,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659648187] [2022-11-16 20:36:33,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:33,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:36:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:36:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:36:34,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:36:34,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659648187] [2022-11-16 20:36:34,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659648187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:36:34,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:36:34,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:36:34,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944677312] [2022-11-16 20:36:34,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:36:34,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:36:34,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:36:34,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:36:34,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:36:34,061 INFO L87 Difference]: Start difference. First operand has 144 states, 104 states have (on average 1.5288461538461537) internal successors, (159), 105 states have internal predecessors, (159), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 20:36:34,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:36:34,259 INFO L93 Difference]: Finished difference Result 289 states and 469 transitions. [2022-11-16 20:36:34,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:36:34,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-11-16 20:36:34,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:36:34,280 INFO L225 Difference]: With dead ends: 289 [2022-11-16 20:36:34,283 INFO L226 Difference]: Without dead ends: 147 [2022-11-16 20:36:34,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:36:34,297 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 5 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:36:34,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 611 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:36:34,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-16 20:36:34,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-16 20:36:34,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 107 states have (on average 1.4953271028037383) internal successors, (160), 107 states have internal predecessors, (160), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-16 20:36:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 222 transitions. [2022-11-16 20:36:34,356 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 222 transitions. Word has length 19 [2022-11-16 20:36:34,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:36:34,357 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 222 transitions. [2022-11-16 20:36:34,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 20:36:34,358 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 222 transitions. [2022-11-16 20:36:34,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 20:36:34,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:36:34,360 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:36:34,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:36:34,369 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:36:34,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:36:34,370 INFO L85 PathProgramCache]: Analyzing trace with hash 455532572, now seen corresponding path program 1 times [2022-11-16 20:36:34,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:36:34,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987777215] [2022-11-16 20:36:34,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:34,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:36:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:36:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:36:34,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:36:34,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987777215] [2022-11-16 20:36:34,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987777215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:36:34,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:36:34,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:36:34,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775081870] [2022-11-16 20:36:34,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:36:34,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:36:34,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:36:34,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:36:34,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:36:34,673 INFO L87 Difference]: Start difference. First operand 147 states and 222 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 20:36:34,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:36:34,775 INFO L93 Difference]: Finished difference Result 296 states and 447 transitions. [2022-11-16 20:36:34,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:36:34,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-16 20:36:34,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:36:34,778 INFO L225 Difference]: With dead ends: 296 [2022-11-16 20:36:34,778 INFO L226 Difference]: Without dead ends: 152 [2022-11-16 20:36:34,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:36:34,780 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 6 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:36:34,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 623 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:36:34,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-16 20:36:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-16 20:36:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 111 states have (on average 1.4774774774774775) internal successors, (164), 111 states have internal predecessors, (164), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-16 20:36:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 226 transitions. [2022-11-16 20:36:34,798 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 226 transitions. Word has length 28 [2022-11-16 20:36:34,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:36:34,799 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 226 transitions. [2022-11-16 20:36:34,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 20:36:34,799 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 226 transitions. [2022-11-16 20:36:34,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 20:36:34,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:36:34,801 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:36:34,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 20:36:34,801 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:36:34,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:36:34,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1914468921, now seen corresponding path program 1 times [2022-11-16 20:36:34,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:36:34,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937701433] [2022-11-16 20:36:34,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:34,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:36:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:36:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:36:35,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:36:35,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937701433] [2022-11-16 20:36:35,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937701433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:36:35,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:36:35,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:36:35,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745945648] [2022-11-16 20:36:35,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:36:35,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:36:35,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:36:35,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:36:35,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:36:35,023 INFO L87 Difference]: Start difference. First operand 152 states and 226 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 20:36:35,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:36:35,096 INFO L93 Difference]: Finished difference Result 306 states and 458 transitions. [2022-11-16 20:36:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:36:35,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2022-11-16 20:36:35,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:36:35,099 INFO L225 Difference]: With dead ends: 306 [2022-11-16 20:36:35,099 INFO L226 Difference]: Without dead ends: 157 [2022-11-16 20:36:35,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:36:35,101 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 6 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:36:35,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 609 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:36:35,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-16 20:36:35,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-11-16 20:36:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 115 states have (on average 1.4608695652173913) internal successors, (168), 115 states have internal predecessors, (168), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-16 20:36:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 230 transitions. [2022-11-16 20:36:35,118 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 230 transitions. Word has length 36 [2022-11-16 20:36:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:36:35,118 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 230 transitions. [2022-11-16 20:36:35,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 20:36:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 230 transitions. [2022-11-16 20:36:35,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 20:36:35,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:36:35,121 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:36:35,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 20:36:35,121 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:36:35,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:36:35,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1995142899, now seen corresponding path program 1 times [2022-11-16 20:36:35,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:36:35,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221577712] [2022-11-16 20:36:35,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:35,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:36:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:36:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:36:35,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:36:35,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221577712] [2022-11-16 20:36:35,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221577712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:36:35,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:36:35,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:36:35,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587868198] [2022-11-16 20:36:35,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:36:35,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:36:35,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:36:35,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:36:35,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:36:35,411 INFO L87 Difference]: Start difference. First operand 157 states and 230 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 20:36:35,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:36:35,524 INFO L93 Difference]: Finished difference Result 316 states and 466 transitions. [2022-11-16 20:36:35,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:36:35,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2022-11-16 20:36:35,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:36:35,532 INFO L225 Difference]: With dead ends: 316 [2022-11-16 20:36:35,532 INFO L226 Difference]: Without dead ends: 162 [2022-11-16 20:36:35,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:36:35,543 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 6 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:36:35,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 609 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:36:35,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-16 20:36:35,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-11-16 20:36:35,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 119 states have (on average 1.4453781512605042) internal successors, (172), 119 states have internal predecessors, (172), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-16 20:36:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 234 transitions. [2022-11-16 20:36:35,568 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 234 transitions. Word has length 44 [2022-11-16 20:36:35,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:36:35,569 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 234 transitions. [2022-11-16 20:36:35,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 20:36:35,570 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 234 transitions. [2022-11-16 20:36:35,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 20:36:35,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:36:35,578 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 20:36:35,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 20:36:35,579 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:36:35,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:36:35,579 INFO L85 PathProgramCache]: Analyzing trace with hash -401316404, now seen corresponding path program 1 times [2022-11-16 20:36:35,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:36:35,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256194592] [2022-11-16 20:36:35,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:35,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:36:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:36:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:36:35,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:36:35,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256194592] [2022-11-16 20:36:35,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256194592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:36:35,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:36:35,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:36:35,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826974171] [2022-11-16 20:36:35,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:36:35,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:36:35,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:36:35,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:36:35,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:36:35,796 INFO L87 Difference]: Start difference. First operand 162 states and 234 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 20:36:35,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:36:35,877 INFO L93 Difference]: Finished difference Result 325 states and 470 transitions. [2022-11-16 20:36:35,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:36:35,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2022-11-16 20:36:35,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:36:35,890 INFO L225 Difference]: With dead ends: 325 [2022-11-16 20:36:35,890 INFO L226 Difference]: Without dead ends: 166 [2022-11-16 20:36:35,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:36:35,896 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 5 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:36:35,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 618 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:36:35,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-16 20:36:35,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-11-16 20:36:35,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 122 states have (on average 1.4344262295081966) internal successors, (175), 122 states have internal predecessors, (175), 31 states have call successors, (31), 12 states have call predecessors, (31), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-16 20:36:35,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 237 transitions. [2022-11-16 20:36:35,923 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 237 transitions. Word has length 44 [2022-11-16 20:36:35,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:36:35,924 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 237 transitions. [2022-11-16 20:36:35,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 20:36:35,925 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 237 transitions. [2022-11-16 20:36:35,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 20:36:35,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:36:35,930 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 20:36:35,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 20:36:35,931 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:36:35,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:36:35,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1513077261, now seen corresponding path program 1 times [2022-11-16 20:36:35,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:36:35,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011955299] [2022-11-16 20:36:35,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:35,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:36:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:36:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 20:36:36,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:36:36,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011955299] [2022-11-16 20:36:36,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011955299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:36:36,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:36:36,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:36:36,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62540351] [2022-11-16 20:36:36,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:36:36,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:36:36,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:36:36,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:36:36,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:36:36,212 INFO L87 Difference]: Start difference. First operand 166 states and 237 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 20:36:36,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:36:36,286 INFO L93 Difference]: Finished difference Result 335 states and 479 transitions. [2022-11-16 20:36:36,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:36:36,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 52 [2022-11-16 20:36:36,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:36:36,290 INFO L225 Difference]: With dead ends: 335 [2022-11-16 20:36:36,290 INFO L226 Difference]: Without dead ends: 172 [2022-11-16 20:36:36,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:36:36,292 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 7 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:36:36,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 620 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:36:36,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-16 20:36:36,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-11-16 20:36:36,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 127 states have (on average 1.4173228346456692) internal successors, (180), 127 states have internal predecessors, (180), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-16 20:36:36,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 242 transitions. [2022-11-16 20:36:36,322 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 242 transitions. Word has length 52 [2022-11-16 20:36:36,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:36:36,323 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 242 transitions. [2022-11-16 20:36:36,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 20:36:36,324 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 242 transitions. [2022-11-16 20:36:36,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 20:36:36,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:36:36,327 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:36:36,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 20:36:36,327 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:36:36,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:36:36,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2060811264, now seen corresponding path program 1 times [2022-11-16 20:36:36,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:36:36,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546810305] [2022-11-16 20:36:36,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:36,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:36:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:36:36,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 20:36:36,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:36:36,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546810305] [2022-11-16 20:36:36,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546810305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:36:36,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746218981] [2022-11-16 20:36:36,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:36,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:36:36,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:36:36,874 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:36:36,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:36:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:36:37,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 20:36:37,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:36:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:36:37,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:36:37,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746218981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:36:37,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:36:37,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-11-16 20:36:37,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076743859] [2022-11-16 20:36:37,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:36:37,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 20:36:37,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:36:37,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 20:36:37,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-16 20:36:37,280 INFO L87 Difference]: Start difference. First operand 172 states and 242 transitions. Second operand has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 20:36:37,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:36:37,637 INFO L93 Difference]: Finished difference Result 510 states and 710 transitions. [2022-11-16 20:36:37,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 20:36:37,638 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 55 [2022-11-16 20:36:37,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:36:37,640 INFO L225 Difference]: With dead ends: 510 [2022-11-16 20:36:37,640 INFO L226 Difference]: Without dead ends: 331 [2022-11-16 20:36:37,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-11-16 20:36:37,644 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 201 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:36:37,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 1267 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:36:37,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-16 20:36:37,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 327. [2022-11-16 20:36:37,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 240 states have (on average 1.4083333333333334) internal successors, (338), 241 states have internal predecessors, (338), 60 states have call successors, (60), 26 states have call predecessors, (60), 26 states have return successors, (60), 59 states have call predecessors, (60), 60 states have call successors, (60) [2022-11-16 20:36:37,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 458 transitions. [2022-11-16 20:36:37,674 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 458 transitions. Word has length 55 [2022-11-16 20:36:37,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:36:37,676 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 458 transitions. [2022-11-16 20:36:37,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 20:36:37,676 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 458 transitions. [2022-11-16 20:36:37,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-16 20:36:37,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:36:37,678 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:36:37,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:36:37,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 20:36:37,884 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:36:37,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:36:37,885 INFO L85 PathProgramCache]: Analyzing trace with hash -133773083, now seen corresponding path program 1 times [2022-11-16 20:36:37,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:36:37,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18212959] [2022-11-16 20:36:37,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:37,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:36:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:36:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 20:36:38,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:36:38,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18212959] [2022-11-16 20:36:38,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18212959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:36:38,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800916296] [2022-11-16 20:36:38,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:38,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:36:38,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:36:38,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:36:38,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:36:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:36:38,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 20:36:38,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:36:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:36:39,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:36:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 20:36:39,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800916296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:36:39,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [277669337] [2022-11-16 20:36:39,259 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-16 20:36:39,259 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:36:39,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:36:39,269 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:36:39,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:36:42,576 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-16 20:36:42,618 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-16 20:36:42,661 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 94 for LOIs [2022-11-16 20:36:42,706 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:36:55,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [277669337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:36:55,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:36:55,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [9, 9, 9] total 35 [2022-11-16 20:36:55,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021930302] [2022-11-16 20:36:55,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:36:55,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 20:36:55,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:36:55,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 20:36:55,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 20:36:55,016 INFO L87 Difference]: Start difference. First operand 327 states and 458 transitions. Second operand has 24 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-16 20:37:03,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:37:03,140 INFO L93 Difference]: Finished difference Result 740 states and 1044 transitions. [2022-11-16 20:37:03,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 20:37:03,141 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 57 [2022-11-16 20:37:03,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:37:03,145 INFO L225 Difference]: With dead ends: 740 [2022-11-16 20:37:03,146 INFO L226 Difference]: Without dead ends: 416 [2022-11-16 20:37:03,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 141 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 20:37:03,148 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 194 mSDsluCounter, 2666 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 2942 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:37:03,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 2942 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-16 20:37:03,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-11-16 20:37:03,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 393. [2022-11-16 20:37:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 287 states have (on average 1.386759581881533) internal successors, (398), 288 states have internal predecessors, (398), 75 states have call successors, (75), 30 states have call predecessors, (75), 30 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2022-11-16 20:37:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 548 transitions. [2022-11-16 20:37:03,231 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 548 transitions. Word has length 57 [2022-11-16 20:37:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:37:03,232 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 548 transitions. [2022-11-16 20:37:03,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-16 20:37:03,232 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 548 transitions. [2022-11-16 20:37:03,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-16 20:37:03,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:37:03,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:37:03,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 20:37:03,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:03,439 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:37:03,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:37:03,440 INFO L85 PathProgramCache]: Analyzing trace with hash 827590853, now seen corresponding path program 1 times [2022-11-16 20:37:03,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:37:03,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370770133] [2022-11-16 20:37:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:03,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:37:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:37:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 20:37:03,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:37:03,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370770133] [2022-11-16 20:37:03,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370770133] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:37:03,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093941405] [2022-11-16 20:37:03,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:03,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:03,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:37:03,848 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:37:03,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 20:37:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:37:03,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 20:37:03,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:37:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:37:04,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:37:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 20:37:04,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093941405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:37:04,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [71305178] [2022-11-16 20:37:04,475 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-16 20:37:04,475 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:37:04,476 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:37:04,476 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:37:04,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:37:07,729 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-16 20:37:07,778 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-16 20:37:07,806 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-16 20:37:07,881 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:37:23,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [71305178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:37:23,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:37:23,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [9, 9, 9] total 34 [2022-11-16 20:37:23,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758299105] [2022-11-16 20:37:23,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:37:23,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 20:37:23,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:37:23,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 20:37:23,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 20:37:23,186 INFO L87 Difference]: Start difference. First operand 393 states and 548 transitions. Second operand has 23 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 20:37:28,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:37:28,155 INFO L93 Difference]: Finished difference Result 813 states and 1151 transitions. [2022-11-16 20:37:28,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 20:37:28,156 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 57 [2022-11-16 20:37:28,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:37:28,159 INFO L225 Difference]: With dead ends: 813 [2022-11-16 20:37:28,160 INFO L226 Difference]: Without dead ends: 489 [2022-11-16 20:37:28,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 20:37:28,162 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 156 mSDsluCounter, 2130 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 2422 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:37:28,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 2422 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-16 20:37:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-11-16 20:37:28,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 457. [2022-11-16 20:37:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 333 states have (on average 1.3723723723723724) internal successors, (457), 334 states have internal predecessors, (457), 90 states have call successors, (90), 33 states have call predecessors, (90), 33 states have return successors, (90), 89 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-16 20:37:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 637 transitions. [2022-11-16 20:37:28,254 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 637 transitions. Word has length 57 [2022-11-16 20:37:28,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:37:28,254 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 637 transitions. [2022-11-16 20:37:28,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 20:37:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 637 transitions. [2022-11-16 20:37:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-16 20:37:28,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:37:28,256 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:37:28,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 20:37:28,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:28,458 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:37:28,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:37:28,458 INFO L85 PathProgramCache]: Analyzing trace with hash 152385642, now seen corresponding path program 1 times [2022-11-16 20:37:28,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:37:28,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914472074] [2022-11-16 20:37:28,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:28,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:37:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:37:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 20:37:28,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:37:28,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914472074] [2022-11-16 20:37:28,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914472074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:37:28,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066798519] [2022-11-16 20:37:28,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:28,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:28,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:37:28,840 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:37:28,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 20:37:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:37:28,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 20:37:28,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:37:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:37:29,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:37:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 20:37:29,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066798519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:37:29,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [96819401] [2022-11-16 20:37:29,397 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-16 20:37:29,397 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:37:29,397 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:37:29,397 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:37:29,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:37:31,306 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-16 20:37:31,343 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-16 20:37:31,372 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 93 for LOIs [2022-11-16 20:37:31,412 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:37:45,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [96819401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:37:45,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:37:45,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [9, 9, 9] total 37 [2022-11-16 20:37:45,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129411776] [2022-11-16 20:37:45,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:37:45,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 20:37:45,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:37:45,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 20:37:45,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 20:37:45,492 INFO L87 Difference]: Start difference. First operand 457 states and 637 transitions. Second operand has 26 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 18 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-16 20:37:54,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:37:54,850 INFO L93 Difference]: Finished difference Result 866 states and 1221 transitions. [2022-11-16 20:37:54,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 20:37:54,851 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 18 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-11-16 20:37:54,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:37:54,853 INFO L225 Difference]: With dead ends: 866 [2022-11-16 20:37:54,853 INFO L226 Difference]: Without dead ends: 542 [2022-11-16 20:37:54,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 145 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=181, Invalid=1379, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 20:37:54,855 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 143 mSDsluCounter, 3036 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 3344 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:37:54,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 3344 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-16 20:37:54,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-11-16 20:37:54,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 493. [2022-11-16 20:37:54,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 359 states have (on average 1.3565459610027855) internal successors, (487), 360 states have internal predecessors, (487), 97 states have call successors, (97), 36 states have call predecessors, (97), 36 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-16 20:37:54,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 681 transitions. [2022-11-16 20:37:54,952 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 681 transitions. Word has length 59 [2022-11-16 20:37:54,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:37:54,952 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 681 transitions. [2022-11-16 20:37:54,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 18 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-16 20:37:54,953 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 681 transitions. [2022-11-16 20:37:54,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 20:37:54,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:37:54,954 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:37:54,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:37:55,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 20:37:55,160 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:37:55,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:37:55,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1305511079, now seen corresponding path program 1 times [2022-11-16 20:37:55,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:37:55,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051690961] [2022-11-16 20:37:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:55,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:37:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:37:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:37:55,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:37:55,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051690961] [2022-11-16 20:37:55,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051690961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:37:55,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:37:55,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:37:55,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443544838] [2022-11-16 20:37:55,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:37:55,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:37:55,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:37:55,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:37:55,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:37:55,290 INFO L87 Difference]: Start difference. First operand 493 states and 681 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-16 20:37:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:37:55,427 INFO L93 Difference]: Finished difference Result 893 states and 1255 transitions. [2022-11-16 20:37:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:37:55,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 61 [2022-11-16 20:37:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:37:55,431 INFO L225 Difference]: With dead ends: 893 [2022-11-16 20:37:55,431 INFO L226 Difference]: Without dead ends: 501 [2022-11-16 20:37:55,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:37:55,433 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 5 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:37:55,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 618 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:37:55,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-11-16 20:37:55,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2022-11-16 20:37:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 365 states have (on average 1.3506849315068492) internal successors, (493), 366 states have internal predecessors, (493), 97 states have call successors, (97), 38 states have call predecessors, (97), 38 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-16 20:37:55,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 687 transitions. [2022-11-16 20:37:55,535 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 687 transitions. Word has length 61 [2022-11-16 20:37:55,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:37:55,535 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 687 transitions. [2022-11-16 20:37:55,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-16 20:37:55,536 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 687 transitions. [2022-11-16 20:37:55,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-16 20:37:55,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:37:55,537 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:37:55,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 20:37:55,537 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:37:55,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:37:55,538 INFO L85 PathProgramCache]: Analyzing trace with hash 219036085, now seen corresponding path program 1 times [2022-11-16 20:37:55,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:37:55,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383678216] [2022-11-16 20:37:55,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:55,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:37:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:37:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 20:37:55,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:37:55,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383678216] [2022-11-16 20:37:55,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383678216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:37:55,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968517689] [2022-11-16 20:37:55,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:55,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:55,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:37:55,978 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:37:56,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:37:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:37:56,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 20:37:56,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:37:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:37:56,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:37:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 20:37:56,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968517689] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:37:56,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [215225182] [2022-11-16 20:37:56,523 INFO L159 IcfgInterpreter]: Started Sifa with 55 locations of interest [2022-11-16 20:37:56,523 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:37:56,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:37:56,524 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:37:56,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:38:00,214 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 231 for LOIs [2022-11-16 20:38:00,471 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-16 20:38:00,490 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 192 for LOIs [2022-11-16 20:38:00,622 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 154 for LOIs [2022-11-16 20:38:00,658 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-11-16 20:38:00,704 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-16 20:38:00,751 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:38:44,618 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13533#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (not (= (mod ~side1Failed~0 256) 0)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (not (= (mod ~side1Failed_History_1~0 256) 0)) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (<= 0 ~manual_selection_History_2~0) (= (mod ~side2Failed_History_1~0 256) 0) (= ~side2_written~0 0) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (= ~s2p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (<= ~manual_selection_History_2~0 0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-16 20:38:44,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:38:44,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:38:44,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-16 20:38:44,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358635061] [2022-11-16 20:38:44,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:38:44,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 20:38:44,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:38:44,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 20:38:44,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2503, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 20:38:44,621 INFO L87 Difference]: Start difference. First operand 501 states and 687 transitions. Second operand has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-16 20:38:45,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:38:45,327 INFO L93 Difference]: Finished difference Result 1221 states and 1699 transitions. [2022-11-16 20:38:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 20:38:45,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 65 [2022-11-16 20:38:45,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:38:45,333 INFO L225 Difference]: With dead ends: 1221 [2022-11-16 20:38:45,333 INFO L226 Difference]: Without dead ends: 837 [2022-11-16 20:38:45,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 140 SyntacticMatches, 12 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 44.1s TimeCoverageRelationStatistics Valid=277, Invalid=3029, Unknown=0, NotChecked=0, Total=3306 [2022-11-16 20:38:45,336 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 299 mSDsluCounter, 3063 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:38:45,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 3396 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 20:38:45,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-11-16 20:38:45,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 529. [2022-11-16 20:38:45,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 386 states have (on average 1.3160621761658031) internal successors, (508), 389 states have internal predecessors, (508), 95 states have call successors, (95), 47 states have call predecessors, (95), 47 states have return successors, (95), 92 states have call predecessors, (95), 95 states have call successors, (95) [2022-11-16 20:38:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 698 transitions. [2022-11-16 20:38:45,462 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 698 transitions. Word has length 65 [2022-11-16 20:38:45,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:38:45,463 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 698 transitions. [2022-11-16 20:38:45,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-16 20:38:45,464 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 698 transitions. [2022-11-16 20:38:45,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 20:38:45,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:38:45,470 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:38:45,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 20:38:45,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:38:45,676 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:38:45,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:38:45,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1688305221, now seen corresponding path program 1 times [2022-11-16 20:38:45,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:38:45,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67583856] [2022-11-16 20:38:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:38:45,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:38:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:38:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 20:38:45,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:38:45,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67583856] [2022-11-16 20:38:45,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67583856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:38:45,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:38:45,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 20:38:45,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240402993] [2022-11-16 20:38:45,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:38:45,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 20:38:45,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:38:45,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 20:38:45,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-16 20:38:45,988 INFO L87 Difference]: Start difference. First operand 529 states and 698 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 20:38:46,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:38:46,748 INFO L93 Difference]: Finished difference Result 1167 states and 1611 transitions. [2022-11-16 20:38:46,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 20:38:46,748 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 66 [2022-11-16 20:38:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:38:46,753 INFO L225 Difference]: With dead ends: 1167 [2022-11-16 20:38:46,753 INFO L226 Difference]: Without dead ends: 861 [2022-11-16 20:38:46,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:38:46,755 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 538 mSDsluCounter, 1413 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:38:46,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 1810 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 20:38:46,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-16 20:38:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 657. [2022-11-16 20:38:46,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 477 states have (on average 1.3123689727463312) internal successors, (626), 480 states have internal predecessors, (626), 119 states have call successors, (119), 60 states have call predecessors, (119), 60 states have return successors, (119), 116 states have call predecessors, (119), 119 states have call successors, (119) [2022-11-16 20:38:46,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 864 transitions. [2022-11-16 20:38:46,866 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 864 transitions. Word has length 66 [2022-11-16 20:38:46,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:38:46,866 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 864 transitions. [2022-11-16 20:38:46,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 20:38:46,866 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 864 transitions. [2022-11-16 20:38:46,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 20:38:46,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:38:46,868 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:38:46,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 20:38:46,868 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:38:46,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:38:46,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1045684058, now seen corresponding path program 1 times [2022-11-16 20:38:46,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:38:46,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779433227] [2022-11-16 20:38:46,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:38:46,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:38:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:38:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 20:38:47,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:38:47,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779433227] [2022-11-16 20:38:47,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779433227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:38:47,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:38:47,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 20:38:47,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091649764] [2022-11-16 20:38:47,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:38:47,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 20:38:47,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:38:47,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 20:38:47,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-16 20:38:47,117 INFO L87 Difference]: Start difference. First operand 657 states and 864 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-16 20:38:48,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:38:48,005 INFO L93 Difference]: Finished difference Result 1524 states and 2101 transitions. [2022-11-16 20:38:48,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 20:38:48,005 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 68 [2022-11-16 20:38:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:38:48,011 INFO L225 Difference]: With dead ends: 1524 [2022-11-16 20:38:48,011 INFO L226 Difference]: Without dead ends: 1194 [2022-11-16 20:38:48,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:38:48,013 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 580 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 2174 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:38:48,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 2174 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 20:38:48,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-11-16 20:38:48,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 919. [2022-11-16 20:38:48,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 664 states have (on average 1.3207831325301205) internal successors, (877), 669 states have internal predecessors, (877), 169 states have call successors, (169), 85 states have call predecessors, (169), 85 states have return successors, (169), 164 states have call predecessors, (169), 169 states have call successors, (169) [2022-11-16 20:38:48,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1215 transitions. [2022-11-16 20:38:48,157 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1215 transitions. Word has length 68 [2022-11-16 20:38:48,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:38:48,158 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1215 transitions. [2022-11-16 20:38:48,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-16 20:38:48,158 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1215 transitions. [2022-11-16 20:38:48,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-16 20:38:48,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:38:48,159 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:38:48,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 20:38:48,160 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:38:48,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:38:48,160 INFO L85 PathProgramCache]: Analyzing trace with hash 508139515, now seen corresponding path program 1 times [2022-11-16 20:38:48,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:38:48,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733280562] [2022-11-16 20:38:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:38:48,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:38:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:38:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 20:38:48,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:38:48,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733280562] [2022-11-16 20:38:48,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733280562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:38:48,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253018355] [2022-11-16 20:38:48,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:38:48,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:38:48,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:38:48,492 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:38:48,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 20:38:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:38:48,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:38:48,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:38:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:38:48,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:38:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 20:38:48,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253018355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:38:48,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1084151091] [2022-11-16 20:38:48,914 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2022-11-16 20:38:48,914 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:38:48,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:38:48,915 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:38:48,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:38:53,283 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-16 20:38:53,320 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-16 20:38:53,349 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-11-16 20:38:53,467 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-16 20:38:53,523 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:39:20,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1084151091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:39:20,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:39:20,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [8, 9, 9] total 45 [2022-11-16 20:39:20,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529664191] [2022-11-16 20:39:20,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:39:20,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 20:39:20,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:39:20,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 20:39:20,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1801, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 20:39:20,742 INFO L87 Difference]: Start difference. First operand 919 states and 1215 transitions. Second operand has 34 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 23 states have internal predecessors, (43), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-16 20:39:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:39:28,146 INFO L93 Difference]: Finished difference Result 1488 states and 1984 transitions. [2022-11-16 20:39:28,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 20:39:28,147 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 23 states have internal predecessors, (43), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 72 [2022-11-16 20:39:28,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:39:28,151 INFO L225 Difference]: With dead ends: 1488 [2022-11-16 20:39:28,151 INFO L226 Difference]: Without dead ends: 905 [2022-11-16 20:39:28,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 170 SyntacticMatches, 12 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=196, Invalid=1966, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 20:39:28,154 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 93 mSDsluCounter, 2521 mSDsCounter, 0 mSdLazyCounter, 2249 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 2718 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:39:28,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 2718 Invalid, 2267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2249 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-16 20:39:28,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-11-16 20:39:28,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 905. [2022-11-16 20:39:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 654 states have (on average 1.319571865443425) internal successors, (863), 659 states have internal predecessors, (863), 166 states have call successors, (166), 84 states have call predecessors, (166), 84 states have return successors, (166), 161 states have call predecessors, (166), 166 states have call successors, (166) [2022-11-16 20:39:28,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1195 transitions. [2022-11-16 20:39:28,329 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1195 transitions. Word has length 72 [2022-11-16 20:39:28,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:39:28,330 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1195 transitions. [2022-11-16 20:39:28,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 23 states have internal predecessors, (43), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-16 20:39:28,330 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1195 transitions. [2022-11-16 20:39:28,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-16 20:39:28,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:39:28,331 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:39:28,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 20:39:28,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 20:39:28,537 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:39:28,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:39:28,538 INFO L85 PathProgramCache]: Analyzing trace with hash -963077093, now seen corresponding path program 1 times [2022-11-16 20:39:28,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:39:28,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781039988] [2022-11-16 20:39:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:39:28,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:39:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:39:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 20:39:28,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:39:28,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781039988] [2022-11-16 20:39:28,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781039988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:39:28,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015149881] [2022-11-16 20:39:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:39:28,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:39:28,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:39:28,897 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:39:28,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 20:39:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:39:29,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 20:39:29,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:39:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:39:29,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:39:29,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015149881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:39:29,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:39:29,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-16 20:39:29,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591435813] [2022-11-16 20:39:29,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:39:29,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 20:39:29,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:39:29,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 20:39:29,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:39:29,166 INFO L87 Difference]: Start difference. First operand 905 states and 1195 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 20:39:29,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:39:29,808 INFO L93 Difference]: Finished difference Result 1770 states and 2402 transitions. [2022-11-16 20:39:29,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 20:39:29,809 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 72 [2022-11-16 20:39:29,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:39:29,813 INFO L225 Difference]: With dead ends: 1770 [2022-11-16 20:39:29,813 INFO L226 Difference]: Without dead ends: 1070 [2022-11-16 20:39:29,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-16 20:39:29,816 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 494 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:39:29,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1510 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 20:39:29,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-11-16 20:39:29,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 905. [2022-11-16 20:39:29,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 654 states have (on average 1.3134556574923548) internal successors, (859), 659 states have internal predecessors, (859), 166 states have call successors, (166), 84 states have call predecessors, (166), 84 states have return successors, (166), 161 states have call predecessors, (166), 166 states have call successors, (166) [2022-11-16 20:39:29,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1191 transitions. [2022-11-16 20:39:29,982 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1191 transitions. Word has length 72 [2022-11-16 20:39:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:39:29,982 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1191 transitions. [2022-11-16 20:39:29,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 20:39:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1191 transitions. [2022-11-16 20:39:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 20:39:29,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:39:29,984 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:39:29,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 20:39:30,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 20:39:30,189 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:39:30,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:39:30,189 INFO L85 PathProgramCache]: Analyzing trace with hash 192208881, now seen corresponding path program 1 times [2022-11-16 20:39:30,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:39:30,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594063943] [2022-11-16 20:39:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:39:30,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:39:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:39:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 20:39:30,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:39:30,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594063943] [2022-11-16 20:39:30,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594063943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:39:30,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:39:30,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 20:39:30,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590225685] [2022-11-16 20:39:30,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:39:30,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:39:30,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:39:30,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:39:30,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:39:30,395 INFO L87 Difference]: Start difference. First operand 905 states and 1191 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-16 20:39:30,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:39:30,685 INFO L93 Difference]: Finished difference Result 1194 states and 1643 transitions. [2022-11-16 20:39:30,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:39:30,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 75 [2022-11-16 20:39:30,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:39:30,691 INFO L225 Difference]: With dead ends: 1194 [2022-11-16 20:39:30,691 INFO L226 Difference]: Without dead ends: 1192 [2022-11-16 20:39:30,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 20:39:30,692 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 153 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:39:30,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 1489 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:39:30,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2022-11-16 20:39:30,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 913. [2022-11-16 20:39:30,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 658 states have (on average 1.3115501519756838) internal successors, (863), 665 states have internal predecessors, (863), 168 states have call successors, (168), 86 states have call predecessors, (168), 86 states have return successors, (168), 161 states have call predecessors, (168), 168 states have call successors, (168) [2022-11-16 20:39:30,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1199 transitions. [2022-11-16 20:39:30,873 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1199 transitions. Word has length 75 [2022-11-16 20:39:30,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:39:30,873 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 1199 transitions. [2022-11-16 20:39:30,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-16 20:39:30,874 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1199 transitions. [2022-11-16 20:39:30,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 20:39:30,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:39:30,876 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:39:30,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 20:39:30,876 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:39:30,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:39:30,877 INFO L85 PathProgramCache]: Analyzing trace with hash 94923755, now seen corresponding path program 1 times [2022-11-16 20:39:30,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:39:30,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207559854] [2022-11-16 20:39:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:39:30,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:39:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:39:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 20:39:31,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:39:31,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207559854] [2022-11-16 20:39:31,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207559854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:39:31,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:39:31,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:39:31,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672262141] [2022-11-16 20:39:31,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:39:31,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:39:31,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:39:31,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:39:31,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:39:31,086 INFO L87 Difference]: Start difference. First operand 913 states and 1199 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-16 20:39:31,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:39:31,299 INFO L93 Difference]: Finished difference Result 1579 states and 2085 transitions. [2022-11-16 20:39:31,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:39:31,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 78 [2022-11-16 20:39:31,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:39:31,303 INFO L225 Difference]: With dead ends: 1579 [2022-11-16 20:39:31,304 INFO L226 Difference]: Without dead ends: 901 [2022-11-16 20:39:31,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:39:31,308 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:39:31,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 610 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:39:31,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-11-16 20:39:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 901. [2022-11-16 20:39:31,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 652 states have (on average 1.2868098159509203) internal successors, (839), 659 states have internal predecessors, (839), 162 states have call successors, (162), 86 states have call predecessors, (162), 86 states have return successors, (162), 155 states have call predecessors, (162), 162 states have call successors, (162) [2022-11-16 20:39:31,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1163 transitions. [2022-11-16 20:39:31,482 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1163 transitions. Word has length 78 [2022-11-16 20:39:31,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:39:31,483 INFO L495 AbstractCegarLoop]: Abstraction has 901 states and 1163 transitions. [2022-11-16 20:39:31,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-16 20:39:31,484 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1163 transitions. [2022-11-16 20:39:31,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-16 20:39:31,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:39:31,485 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:39:31,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 20:39:31,485 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:39:31,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:39:31,486 INFO L85 PathProgramCache]: Analyzing trace with hash -662976287, now seen corresponding path program 1 times [2022-11-16 20:39:31,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:39:31,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203615295] [2022-11-16 20:39:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:39:31,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:39:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:39:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 20:39:31,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:39:31,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203615295] [2022-11-16 20:39:31,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203615295] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:39:31,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290569447] [2022-11-16 20:39:31,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:39:31,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:39:31,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:39:31,939 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:39:31,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 20:39:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:39:32,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 20:39:32,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:39:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 20:39:32,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:39:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 20:39:32,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290569447] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:39:32,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1282580125] [2022-11-16 20:39:32,568 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2022-11-16 20:39:32,568 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:39:32,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:39:32,568 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:39:32,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:39:36,118 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 217 for LOIs [2022-11-16 20:39:36,297 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-16 20:39:36,313 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 121 for LOIs [2022-11-16 20:39:36,414 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 105 for LOIs [2022-11-16 20:39:36,434 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 101 for LOIs [2022-11-16 20:39:36,467 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 94 for LOIs [2022-11-16 20:39:36,491 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:40:13,046 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35484#(and (<= ~active_side_History_0~0 0) (<= 0 (+ ~manual_selection_History_0~0 128)) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (<= 0 (+ ~s2s2_new~0 1)) (= ~cs1~0 0) (<= 0 (+ ~s2s1_new~0 1)) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (<= 0 (+ ~s2p_new~0 1)) (= |assert_#in~arg| 0) (<= 0 ~side2_written~0) (= ~s1s1~0 0) (<= 0 (+ ~s1s2_new~0 1)) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (= ~s2s2~0 0) (not (= (mod ~side1Failed_History_0~0 256) 0)) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (<= (+ ~s2s1_new~0 1) 0) (<= 0 ~manual_selection_History_2~0) (not (= (mod ~side2Failed_History_1~0 256) 0)) (<= (+ ~nomsg~0 1) 0) (= ~s1s2~0 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ 2 ~active_side_History_1~0) 0) (<= (+ ~cs1_new~0 1) 0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= ~manual_selection_History_2~0 0) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (= ~s2p~0 0) (<= (+ ~s2s2_new~0 1) 0) (= (mod ~side1Failed_History_1~0 256) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-16 20:40:13,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:40:13,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:40:13,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-16 20:40:13,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287845939] [2022-11-16 20:40:13,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:40:13,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 20:40:13,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:40:13,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 20:40:13,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=3206, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 20:40:13,049 INFO L87 Difference]: Start difference. First operand 901 states and 1163 transitions. Second operand has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-16 20:40:13,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:40:13,748 INFO L93 Difference]: Finished difference Result 1916 states and 2549 transitions. [2022-11-16 20:40:13,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 20:40:13,749 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 80 [2022-11-16 20:40:13,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:40:13,754 INFO L225 Difference]: With dead ends: 1916 [2022-11-16 20:40:13,754 INFO L226 Difference]: Without dead ends: 1175 [2022-11-16 20:40:13,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 180 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 36.8s TimeCoverageRelationStatistics Valid=363, Invalid=3797, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 20:40:13,758 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 242 mSDsluCounter, 2040 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:40:13,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 2361 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:40:13,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2022-11-16 20:40:13,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 880. [2022-11-16 20:40:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 637 states have (on average 1.2794348508634223) internal successors, (815), 644 states have internal predecessors, (815), 156 states have call successors, (156), 86 states have call predecessors, (156), 86 states have return successors, (156), 149 states have call predecessors, (156), 156 states have call successors, (156) [2022-11-16 20:40:13,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1127 transitions. [2022-11-16 20:40:13,912 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1127 transitions. Word has length 80 [2022-11-16 20:40:13,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:40:13,912 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 1127 transitions. [2022-11-16 20:40:13,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-16 20:40:13,913 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1127 transitions. [2022-11-16 20:40:13,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-16 20:40:13,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:40:13,914 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:40:13,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-16 20:40:14,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:40:14,120 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:40:14,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:40:14,121 INFO L85 PathProgramCache]: Analyzing trace with hash -394555029, now seen corresponding path program 1 times [2022-11-16 20:40:14,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:40:14,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724892944] [2022-11-16 20:40:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:40:14,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:40:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:40:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:40:14,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:40:14,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724892944] [2022-11-16 20:40:14,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724892944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:40:14,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579116120] [2022-11-16 20:40:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:40:14,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:40:14,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:40:14,488 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:40:14,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 20:40:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:40:14,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:40:14,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:40:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:40:14,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:40:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:40:14,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579116120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:40:14,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1274222855] [2022-11-16 20:40:14,850 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2022-11-16 20:40:14,851 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:40:14,851 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:40:14,851 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:40:14,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:40:16,922 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-16 20:40:16,946 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-16 20:40:16,962 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 94 for LOIs [2022-11-16 20:40:17,040 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 100 for LOIs [2022-11-16 20:40:17,068 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 94 for LOIs [2022-11-16 20:40:17,092 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:40:43,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1274222855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:40:43,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:40:43,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [8, 9, 9] total 53 [2022-11-16 20:40:43,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280377694] [2022-11-16 20:40:43,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:40:43,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-16 20:40:43,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:40:43,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-16 20:40:43,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2497, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 20:40:43,933 INFO L87 Difference]: Start difference. First operand 880 states and 1127 transitions. Second operand has 42 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 28 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-16 20:41:10,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:41:10,295 INFO L93 Difference]: Finished difference Result 1489 states and 1937 transitions. [2022-11-16 20:41:10,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 20:41:10,295 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 28 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 80 [2022-11-16 20:41:10,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:41:10,299 INFO L225 Difference]: With dead ends: 1489 [2022-11-16 20:41:10,299 INFO L226 Difference]: Without dead ends: 915 [2022-11-16 20:41:10,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 186 SyntacticMatches, 12 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=458, Invalid=3964, Unknown=0, NotChecked=0, Total=4422 [2022-11-16 20:41:10,302 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 355 mSDsluCounter, 3971 mSDsCounter, 0 mSdLazyCounter, 3316 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 4234 SdHoareTripleChecker+Invalid, 3466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 3316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:41:10,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 4234 Invalid, 3466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 3316 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-11-16 20:41:10,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-11-16 20:41:10,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 883. [2022-11-16 20:41:10,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 639 states have (on average 1.2785602503912363) internal successors, (817), 646 states have internal predecessors, (817), 157 states have call successors, (157), 86 states have call predecessors, (157), 86 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2022-11-16 20:41:10,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1131 transitions. [2022-11-16 20:41:10,472 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1131 transitions. Word has length 80 [2022-11-16 20:41:10,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:41:10,473 INFO L495 AbstractCegarLoop]: Abstraction has 883 states and 1131 transitions. [2022-11-16 20:41:10,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 28 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-16 20:41:10,473 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1131 transitions. [2022-11-16 20:41:10,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-16 20:41:10,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:41:10,475 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:41:10,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 20:41:10,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:41:10,686 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:41:10,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:41:10,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1646880730, now seen corresponding path program 1 times [2022-11-16 20:41:10,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:41:10,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917489872] [2022-11-16 20:41:10,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:41:10,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:41:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:41:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:41:11,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:41:11,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917489872] [2022-11-16 20:41:11,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917489872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:41:11,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217234378] [2022-11-16 20:41:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:41:11,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:41:11,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:41:11,047 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:41:11,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 20:41:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:41:11,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:41:11,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:41:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:41:11,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:41:11,406 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:41:11,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217234378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:41:11,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2093802416] [2022-11-16 20:41:11,409 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-11-16 20:41:11,409 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:41:11,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:41:11,409 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:41:11,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:41:14,939 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-16 20:41:14,964 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-16 20:41:14,983 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-11-16 20:41:15,082 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-11-16 20:41:15,127 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-16 20:41:15,170 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:41:54,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2093802416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:41:54,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:41:54,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [8, 9, 9] total 53 [2022-11-16 20:41:54,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553631425] [2022-11-16 20:41:54,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:41:54,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-16 20:41:54,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:41:54,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-16 20:41:54,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2513, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 20:41:54,136 INFO L87 Difference]: Start difference. First operand 883 states and 1131 transitions. Second operand has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 29 states have internal predecessors, (47), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-16 20:42:05,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:42:05,548 INFO L93 Difference]: Finished difference Result 1492 states and 1941 transitions. [2022-11-16 20:42:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 20:42:05,548 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 29 states have internal predecessors, (47), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 82 [2022-11-16 20:42:05,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:42:05,552 INFO L225 Difference]: With dead ends: 1492 [2022-11-16 20:42:05,552 INFO L226 Difference]: Without dead ends: 918 [2022-11-16 20:42:05,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 193 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=251, Invalid=2611, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 20:42:05,555 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 124 mSDsluCounter, 4831 mSDsCounter, 0 mSdLazyCounter, 3754 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 5129 SdHoareTripleChecker+Invalid, 3780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:42:05,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 5129 Invalid, 3780 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 3754 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-11-16 20:42:05,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-11-16 20:42:05,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 886. [2022-11-16 20:42:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 641 states have (on average 1.2776911076443058) internal successors, (819), 648 states have internal predecessors, (819), 158 states have call successors, (158), 86 states have call predecessors, (158), 86 states have return successors, (158), 151 states have call predecessors, (158), 158 states have call successors, (158) [2022-11-16 20:42:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1135 transitions. [2022-11-16 20:42:05,723 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1135 transitions. Word has length 82 [2022-11-16 20:42:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:42:05,723 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 1135 transitions. [2022-11-16 20:42:05,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 29 states have internal predecessors, (47), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-16 20:42:05,724 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1135 transitions. [2022-11-16 20:42:05,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-16 20:42:05,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:42:05,726 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:42:05,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 20:42:05,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 20:42:05,932 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:42:05,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:42:05,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1993333853, now seen corresponding path program 1 times [2022-11-16 20:42:05,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:42:05,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581775342] [2022-11-16 20:42:05,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:42:05,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:42:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:42:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-16 20:42:06,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:42:06,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581775342] [2022-11-16 20:42:06,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581775342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:42:06,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:42:06,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:42:06,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784721110] [2022-11-16 20:42:06,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:42:06,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:42:06,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:42:06,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:42:06,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:42:06,102 INFO L87 Difference]: Start difference. First operand 886 states and 1135 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-16 20:42:06,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:42:06,373 INFO L93 Difference]: Finished difference Result 1513 states and 1955 transitions. [2022-11-16 20:42:06,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:42:06,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 87 [2022-11-16 20:42:06,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:42:06,378 INFO L225 Difference]: With dead ends: 1513 [2022-11-16 20:42:06,378 INFO L226 Difference]: Without dead ends: 874 [2022-11-16 20:42:06,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:42:06,382 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 7 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:42:06,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 592 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:42:06,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-11-16 20:42:06,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 874. [2022-11-16 20:42:06,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 635 states have (on average 1.2519685039370079) internal successors, (795), 642 states have internal predecessors, (795), 152 states have call successors, (152), 86 states have call predecessors, (152), 86 states have return successors, (152), 145 states have call predecessors, (152), 152 states have call successors, (152) [2022-11-16 20:42:06,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1099 transitions. [2022-11-16 20:42:06,601 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1099 transitions. Word has length 87 [2022-11-16 20:42:06,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:42:06,602 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1099 transitions. [2022-11-16 20:42:06,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-16 20:42:06,602 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1099 transitions. [2022-11-16 20:42:06,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-16 20:42:06,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:42:06,604 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:42:06,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 20:42:06,604 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:42:06,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:42:06,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1959131448, now seen corresponding path program 1 times [2022-11-16 20:42:06,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:42:06,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10826816] [2022-11-16 20:42:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:42:06,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:42:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:42:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 20:42:06,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:42:06,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10826816] [2022-11-16 20:42:06,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10826816] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:42:06,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864709156] [2022-11-16 20:42:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:42:06,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:42:06,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:42:06,950 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:42:06,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 20:42:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:42:07,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:42:07,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:42:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 20:42:07,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:42:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 20:42:07,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864709156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:42:07,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1136839732] [2022-11-16 20:42:07,336 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2022-11-16 20:42:07,336 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:42:07,338 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:42:07,338 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:42:07,338 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:42:10,814 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-16 20:42:10,842 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-16 20:42:10,864 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-11-16 20:42:10,959 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 202 for LOIs [2022-11-16 20:42:11,326 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-16 20:42:11,374 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:42:55,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1136839732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:42:55,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:42:55,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [8, 9, 9] total 54 [2022-11-16 20:42:55,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596625043] [2022-11-16 20:42:55,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:42:55,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 20:42:55,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:42:55,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 20:42:55,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2588, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 20:42:55,089 INFO L87 Difference]: Start difference. First operand 874 states and 1099 transitions. Second operand has 43 states, 38 states have (on average 1.263157894736842) internal successors, (48), 29 states have internal predecessors, (48), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-16 20:43:06,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:43:06,842 INFO L93 Difference]: Finished difference Result 1462 states and 1864 transitions. [2022-11-16 20:43:06,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 20:43:06,843 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 1.263157894736842) internal successors, (48), 29 states have internal predecessors, (48), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 87 [2022-11-16 20:43:06,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:43:06,846 INFO L225 Difference]: With dead ends: 1462 [2022-11-16 20:43:06,846 INFO L226 Difference]: Without dead ends: 896 [2022-11-16 20:43:06,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 208 SyntacticMatches, 10 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 44.9s TimeCoverageRelationStatistics Valid=282, Invalid=2688, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 20:43:06,849 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 232 mSDsluCounter, 4747 mSDsCounter, 0 mSdLazyCounter, 3996 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 5010 SdHoareTripleChecker+Invalid, 4080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:43:06,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 5010 Invalid, 4080 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [84 Valid, 3996 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2022-11-16 20:43:06,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-11-16 20:43:07,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 861. [2022-11-16 20:43:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 626 states have (on average 1.2492012779552715) internal successors, (782), 633 states have internal predecessors, (782), 148 states have call successors, (148), 86 states have call predecessors, (148), 86 states have return successors, (148), 141 states have call predecessors, (148), 148 states have call successors, (148) [2022-11-16 20:43:07,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1078 transitions. [2022-11-16 20:43:07,035 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1078 transitions. Word has length 87 [2022-11-16 20:43:07,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:43:07,037 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 1078 transitions. [2022-11-16 20:43:07,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 1.263157894736842) internal successors, (48), 29 states have internal predecessors, (48), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-16 20:43:07,037 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1078 transitions. [2022-11-16 20:43:07,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-16 20:43:07,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:43:07,045 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:43:07,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 20:43:07,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 20:43:07,251 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:43:07,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:43:07,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1376257965, now seen corresponding path program 1 times [2022-11-16 20:43:07,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:43:07,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960544005] [2022-11-16 20:43:07,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:43:07,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:43:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:43:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 20:43:07,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:43:07,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960544005] [2022-11-16 20:43:07,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960544005] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:43:07,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727908520] [2022-11-16 20:43:07,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:43:07,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:43:07,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:43:07,599 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:43:07,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 20:43:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:43:07,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:43:07,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:43:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 20:43:07,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:43:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 20:43:07,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727908520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:43:07,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1057819276] [2022-11-16 20:43:07,977 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-16 20:43:07,977 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:43:07,978 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:43:07,978 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:43:07,978 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:43:11,060 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-16 20:43:11,082 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-16 20:43:11,100 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 198 for LOIs [2022-11-16 20:43:11,591 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 203 for LOIs [2022-11-16 20:43:11,969 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-16 20:43:12,016 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:43:56,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1057819276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:43:56,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:43:56,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [8, 9, 9] total 54 [2022-11-16 20:43:56,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391109265] [2022-11-16 20:43:56,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:43:56,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 20:43:56,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:43:56,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 20:43:56,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2618, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 20:43:56,749 INFO L87 Difference]: Start difference. First operand 861 states and 1078 transitions. Second operand has 43 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 30 states have internal predecessors, (50), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-16 20:44:08,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:44:08,730 INFO L93 Difference]: Finished difference Result 1462 states and 1864 transitions. [2022-11-16 20:44:08,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 20:44:08,730 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 30 states have internal predecessors, (50), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) Word has length 89 [2022-11-16 20:44:08,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:44:08,734 INFO L225 Difference]: With dead ends: 1462 [2022-11-16 20:44:08,734 INFO L226 Difference]: Without dead ends: 893 [2022-11-16 20:44:08,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 215 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 45.9s TimeCoverageRelationStatistics Valid=252, Invalid=2718, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 20:44:08,736 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 303 mSDsluCounter, 4726 mSDsCounter, 0 mSdLazyCounter, 3872 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 5006 SdHoareTripleChecker+Invalid, 3965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 3872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:44:08,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 5006 Invalid, 3965 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [93 Valid, 3872 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2022-11-16 20:44:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-11-16 20:44:08,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 861. [2022-11-16 20:44:08,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 626 states have (on average 1.2476038338658146) internal successors, (781), 633 states have internal predecessors, (781), 148 states have call successors, (148), 86 states have call predecessors, (148), 86 states have return successors, (148), 141 states have call predecessors, (148), 148 states have call successors, (148) [2022-11-16 20:44:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1077 transitions. [2022-11-16 20:44:08,933 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1077 transitions. Word has length 89 [2022-11-16 20:44:08,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:44:08,933 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 1077 transitions. [2022-11-16 20:44:08,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 30 states have internal predecessors, (50), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-16 20:44:08,933 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1077 transitions. [2022-11-16 20:44:08,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-16 20:44:08,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:44:08,934 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:44:08,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-16 20:44:09,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:44:09,135 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:44:09,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:44:09,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2118828422, now seen corresponding path program 1 times [2022-11-16 20:44:09,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:44:09,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506060516] [2022-11-16 20:44:09,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:44:09,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:44:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:44:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 20:44:09,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:44:09,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506060516] [2022-11-16 20:44:09,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506060516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:44:09,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670011468] [2022-11-16 20:44:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:44:09,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:44:09,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:44:09,510 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:44:09,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 20:44:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:44:09,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:44:09,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:44:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 20:44:09,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:44:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 20:44:09,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670011468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:44:09,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1856437481] [2022-11-16 20:44:09,941 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-11-16 20:44:09,941 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:44:09,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:44:09,942 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:44:09,942 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:44:12,662 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-16 20:44:12,686 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-16 20:44:12,704 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 93 for LOIs [2022-11-16 20:44:12,781 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 135 for LOIs [2022-11-16 20:44:13,071 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 93 for LOIs [2022-11-16 20:44:13,095 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:44:49,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1856437481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:44:49,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:44:49,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [8, 9, 9] total 59 [2022-11-16 20:44:49,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098421760] [2022-11-16 20:44:49,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:44:49,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 20:44:49,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:44:49,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 20:44:49,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=3106, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 20:44:49,401 INFO L87 Difference]: Start difference. First operand 861 states and 1077 transitions. Second operand has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 33 states have internal predecessors, (54), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-16 20:45:21,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:45:21,303 INFO L93 Difference]: Finished difference Result 1449 states and 1842 transitions. [2022-11-16 20:45:21,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 20:45:21,304 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 33 states have internal predecessors, (54), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 93 [2022-11-16 20:45:21,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:45:21,307 INFO L225 Difference]: With dead ends: 1449 [2022-11-16 20:45:21,308 INFO L226 Difference]: Without dead ends: 883 [2022-11-16 20:45:21,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 217 SyntacticMatches, 14 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 58.8s TimeCoverageRelationStatistics Valid=568, Invalid=4982, Unknown=0, NotChecked=0, Total=5550 [2022-11-16 20:45:21,311 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 284 mSDsluCounter, 4631 mSDsCounter, 0 mSdLazyCounter, 3690 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 4916 SdHoareTripleChecker+Invalid, 3828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 3690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:45:21,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 4916 Invalid, 3828 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 3690 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-11-16 20:45:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-11-16 20:45:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 848. [2022-11-16 20:45:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 617 states have (on average 1.2447325769854134) internal successors, (768), 624 states have internal predecessors, (768), 144 states have call successors, (144), 86 states have call predecessors, (144), 86 states have return successors, (144), 137 states have call predecessors, (144), 144 states have call successors, (144) [2022-11-16 20:45:21,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1056 transitions. [2022-11-16 20:45:21,531 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1056 transitions. Word has length 93 [2022-11-16 20:45:21,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:45:21,531 INFO L495 AbstractCegarLoop]: Abstraction has 848 states and 1056 transitions. [2022-11-16 20:45:21,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 33 states have internal predecessors, (54), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-16 20:45:21,531 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1056 transitions. [2022-11-16 20:45:21,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-16 20:45:21,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:45:21,533 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:45:21,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 20:45:21,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:45:21,744 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:45:21,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:45:21,744 INFO L85 PathProgramCache]: Analyzing trace with hash 980190837, now seen corresponding path program 1 times [2022-11-16 20:45:21,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:45:21,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67137918] [2022-11-16 20:45:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:45:21,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:45:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:45:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-16 20:45:21,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:45:21,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67137918] [2022-11-16 20:45:21,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67137918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:45:21,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:45:21,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:45:21,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853813397] [2022-11-16 20:45:21,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:45:21,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:45:21,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:45:21,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:45:21,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:45:21,929 INFO L87 Difference]: Start difference. First operand 848 states and 1056 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-16 20:45:22,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:45:22,194 INFO L93 Difference]: Finished difference Result 1415 states and 1789 transitions. [2022-11-16 20:45:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:45:22,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 103 [2022-11-16 20:45:22,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:45:22,198 INFO L225 Difference]: With dead ends: 1415 [2022-11-16 20:45:22,198 INFO L226 Difference]: Without dead ends: 836 [2022-11-16 20:45:22,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:45:22,200 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 7 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:45:22,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 580 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:45:22,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-11-16 20:45:22,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 786. [2022-11-16 20:45:22,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 575 states have (on average 1.2104347826086956) internal successors, (696), 582 states have internal predecessors, (696), 130 states have call successors, (130), 80 states have call predecessors, (130), 80 states have return successors, (130), 123 states have call predecessors, (130), 130 states have call successors, (130) [2022-11-16 20:45:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 956 transitions. [2022-11-16 20:45:22,359 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 956 transitions. Word has length 103 [2022-11-16 20:45:22,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:45:22,359 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 956 transitions. [2022-11-16 20:45:22,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-16 20:45:22,360 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 956 transitions. [2022-11-16 20:45:22,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-16 20:45:22,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:45:22,362 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:45:22,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-16 20:45:22,362 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:45:22,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:45:22,362 INFO L85 PathProgramCache]: Analyzing trace with hash 652194887, now seen corresponding path program 1 times [2022-11-16 20:45:22,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:45:22,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519412909] [2022-11-16 20:45:22,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:45:22,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:45:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:45:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-16 20:45:22,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:45:22,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519412909] [2022-11-16 20:45:22,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519412909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:45:22,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:45:22,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:45:22,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443405151] [2022-11-16 20:45:22,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:45:22,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:45:22,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:45:22,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:45:22,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:45:22,541 INFO L87 Difference]: Start difference. First operand 786 states and 956 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-16 20:45:22,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:45:22,728 INFO L93 Difference]: Finished difference Result 1258 states and 1560 transitions. [2022-11-16 20:45:22,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:45:22,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 119 [2022-11-16 20:45:22,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:45:22,735 INFO L225 Difference]: With dead ends: 1258 [2022-11-16 20:45:22,735 INFO L226 Difference]: Without dead ends: 774 [2022-11-16 20:45:22,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:45:22,736 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 6 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:45:22,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 571 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:45:22,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-11-16 20:45:22,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 758. [2022-11-16 20:45:22,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 555 states have (on average 1.1891891891891893) internal successors, (660), 562 states have internal predecessors, (660), 124 states have call successors, (124), 78 states have call predecessors, (124), 78 states have return successors, (124), 117 states have call predecessors, (124), 124 states have call successors, (124) [2022-11-16 20:45:22,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 908 transitions. [2022-11-16 20:45:22,871 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 908 transitions. Word has length 119 [2022-11-16 20:45:22,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:45:22,872 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 908 transitions. [2022-11-16 20:45:22,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-16 20:45:22,872 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 908 transitions. [2022-11-16 20:45:22,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 20:45:22,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:45:22,874 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:45:22,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-16 20:45:22,874 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:45:22,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:45:22,874 INFO L85 PathProgramCache]: Analyzing trace with hash 377183108, now seen corresponding path program 1 times [2022-11-16 20:45:22,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:45:22,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526115695] [2022-11-16 20:45:22,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:45:22,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:45:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:45:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-16 20:45:23,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:45:23,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526115695] [2022-11-16 20:45:23,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526115695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:45:23,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797469147] [2022-11-16 20:45:23,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:45:23,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:45:23,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:45:23,240 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:45:23,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 20:45:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:45:23,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:45:23,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:45:23,496 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 69 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-16 20:45:23,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:45:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-16 20:45:23,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797469147] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:45:23,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1748290008] [2022-11-16 20:45:23,642 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2022-11-16 20:45:23,642 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:45:23,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:45:23,643 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:45:23,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:45:31,506 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 91 for LOIs [2022-11-16 20:45:31,612 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-16 20:45:31,629 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-11-16 20:45:31,752 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 151 for LOIs [2022-11-16 20:45:31,786 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 195 for LOIs [2022-11-16 20:45:32,199 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 184 for LOIs [2022-11-16 20:45:32,723 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:46:31,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '66980#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (not (= (mod ~side1Failed~0 256) 0)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) (mod ~side2Failed_History_2~0 256)) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 0) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (= ~s2p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-16 20:46:31,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:46:31,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:46:31,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 13 [2022-11-16 20:46:31,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801920786] [2022-11-16 20:46:31,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:46:31,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 20:46:31,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:46:31,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 20:46:31,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=3709, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 20:46:31,560 INFO L87 Difference]: Start difference. First operand 758 states and 908 transitions. Second operand has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 10 states have internal predecessors, (103), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-16 20:46:32,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:46:32,565 INFO L93 Difference]: Finished difference Result 2063 states and 2618 transitions. [2022-11-16 20:46:32,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 20:46:32,566 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 10 states have internal predecessors, (103), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) Word has length 129 [2022-11-16 20:46:32,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:46:32,572 INFO L225 Difference]: With dead ends: 2063 [2022-11-16 20:46:32,572 INFO L226 Difference]: Without dead ends: 1457 [2022-11-16 20:46:32,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 313 SyntacticMatches, 21 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 59.1s TimeCoverageRelationStatistics Valid=359, Invalid=4333, Unknown=0, NotChecked=0, Total=4692 [2022-11-16 20:46:32,575 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 679 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:46:32,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [707 Valid, 1969 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 20:46:32,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2022-11-16 20:46:32,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1061. [2022-11-16 20:46:32,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 777 states have (on average 1.1814671814671815) internal successors, (918), 787 states have internal predecessors, (918), 172 states have call successors, (172), 111 states have call predecessors, (172), 111 states have return successors, (172), 162 states have call predecessors, (172), 172 states have call successors, (172) [2022-11-16 20:46:32,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1262 transitions. [2022-11-16 20:46:32,762 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1262 transitions. Word has length 129 [2022-11-16 20:46:32,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:46:32,762 INFO L495 AbstractCegarLoop]: Abstraction has 1061 states and 1262 transitions. [2022-11-16 20:46:32,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 10 states have internal predecessors, (103), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-16 20:46:32,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1262 transitions. [2022-11-16 20:46:32,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-16 20:46:32,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:46:32,765 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:46:32,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 20:46:32,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 20:46:32,966 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:46:32,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:46:32,966 INFO L85 PathProgramCache]: Analyzing trace with hash -766349292, now seen corresponding path program 1 times [2022-11-16 20:46:32,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:46:32,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33725758] [2022-11-16 20:46:32,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:46:32,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:46:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:46:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-16 20:46:35,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:46:35,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33725758] [2022-11-16 20:46:35,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33725758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:46:35,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103278380] [2022-11-16 20:46:35,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:46:35,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:46:35,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:46:35,708 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:46:35,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 20:46:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:46:35,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 20:46:35,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:46:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 71 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 20:46:36,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:46:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-16 20:46:37,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103278380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:46:37,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1342509804] [2022-11-16 20:46:37,516 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2022-11-16 20:46:37,517 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:46:37,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:46:37,517 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:46:37,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:46:42,811 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 89 for LOIs [2022-11-16 20:46:42,921 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-16 20:46:42,937 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 120 for LOIs [2022-11-16 20:46:43,090 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 99 for LOIs [2022-11-16 20:46:43,108 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 121 for LOIs [2022-11-16 20:46:43,229 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 130 for LOIs [2022-11-16 20:46:43,544 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:47:39,339 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '72015#(and (<= ~active_side_History_0~0 0) (<= 0 (+ ~manual_selection_History_0~0 128)) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (<= 0 (+ ~s2s2_new~0 1)) (= ~cs1~0 0) (<= 0 (+ ~s2s1_new~0 1)) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) (mod ~side2Failed_History_2~0 256)) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (<= 0 (+ ~s2p_new~0 1)) (= |assert_#in~arg| 0) (<= 0 ~side2_written~0) (= ~s1s1~0 0) (<= 0 (+ ~s1s2_new~0 1)) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (= ~s2s2~0 0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (<= (+ ~s2s1_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) 0) (= ~manual_selection_History_2~0 0) (<= (+ ~nomsg~0 1) 0) (= ~s1s2~0 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ 2 ~active_side_History_1~0) 0) (<= (+ ~cs1_new~0 1) 0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (= ~s2p~0 0) (<= (+ ~s2s2_new~0 1) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-16 20:47:39,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:47:39,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:47:39,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 14, 14] total 55 [2022-11-16 20:47:39,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844167582] [2022-11-16 20:47:39,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:47:39,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-16 20:47:39,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:47:39,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-16 20:47:39,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1989, Invalid=10001, Unknown=0, NotChecked=0, Total=11990 [2022-11-16 20:47:39,343 INFO L87 Difference]: Start difference. First operand 1061 states and 1262 transitions. Second operand has 55 states, 43 states have (on average 3.953488372093023) internal successors, (170), 44 states have internal predecessors, (170), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) [2022-11-16 20:47:46,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:47:46,697 INFO L93 Difference]: Finished difference Result 2756 states and 3613 transitions. [2022-11-16 20:47:46,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-16 20:47:46,698 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 43 states have (on average 3.953488372093023) internal successors, (170), 44 states have internal predecessors, (170), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) Word has length 137 [2022-11-16 20:47:46,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:47:46,704 INFO L225 Difference]: With dead ends: 2756 [2022-11-16 20:47:46,704 INFO L226 Difference]: Without dead ends: 1889 [2022-11-16 20:47:46,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 321 SyntacticMatches, 18 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5985 ImplicationChecksByTransitivity, 59.5s TimeCoverageRelationStatistics Valid=2461, Invalid=16171, Unknown=0, NotChecked=0, Total=18632 [2022-11-16 20:47:46,708 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 1604 mSDsluCounter, 12361 mSDsCounter, 0 mSdLazyCounter, 5588 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1660 SdHoareTripleChecker+Valid, 12818 SdHoareTripleChecker+Invalid, 6065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 5588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:47:46,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1660 Valid, 12818 Invalid, 6065 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [477 Valid, 5588 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-16 20:47:46,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2022-11-16 20:47:46,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1003. [2022-11-16 20:47:46,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 737 states have (on average 1.2048846675712348) internal successors, (888), 749 states have internal predecessors, (888), 160 states have call successors, (160), 105 states have call predecessors, (160), 105 states have return successors, (160), 148 states have call predecessors, (160), 160 states have call successors, (160) [2022-11-16 20:47:46,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1208 transitions. [2022-11-16 20:47:46,951 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1208 transitions. Word has length 137 [2022-11-16 20:47:46,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:47:46,952 INFO L495 AbstractCegarLoop]: Abstraction has 1003 states and 1208 transitions. [2022-11-16 20:47:46,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 43 states have (on average 3.953488372093023) internal successors, (170), 44 states have internal predecessors, (170), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) [2022-11-16 20:47:46,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1208 transitions. [2022-11-16 20:47:46,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-16 20:47:46,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:47:46,954 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:47:46,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 20:47:47,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 20:47:47,160 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:47:47,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:47:47,160 INFO L85 PathProgramCache]: Analyzing trace with hash 605221213, now seen corresponding path program 1 times [2022-11-16 20:47:47,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:47:47,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519285449] [2022-11-16 20:47:47,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:47:47,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:47:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:47:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-16 20:47:47,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:47:47,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519285449] [2022-11-16 20:47:47,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519285449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:47:47,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290632500] [2022-11-16 20:47:47,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:47:47,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:47:47,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:47:47,953 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:47:47,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 20:47:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:47:48,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 20:47:48,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:47:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 64 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-16 20:47:48,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:47:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-16 20:47:49,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290632500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:47:49,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [838624519] [2022-11-16 20:47:49,402 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2022-11-16 20:47:49,402 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:47:49,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:47:49,403 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:47:49,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:48:05,629 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 207 for LOIs [2022-11-16 20:48:05,976 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-16 20:48:06,000 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 96 for LOIs [2022-11-16 20:48:06,083 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 156 for LOIs [2022-11-16 20:48:06,128 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 153 for LOIs [2022-11-16 20:48:06,175 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 95 for LOIs [2022-11-16 20:48:06,201 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:49:02,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [838624519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:49:02,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:49:02,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [9, 10, 9] total 72 [2022-11-16 20:49:02,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609991069] [2022-11-16 20:49:02,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:49:02,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-16 20:49:02,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:49:02,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-16 20:49:02,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=717, Invalid=4395, Unknown=0, NotChecked=0, Total=5112 [2022-11-16 20:49:02,014 INFO L87 Difference]: Start difference. First operand 1003 states and 1208 transitions. Second operand has 50 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 34 states have internal predecessors, (58), 12 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-16 20:49:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:49:15,295 INFO L93 Difference]: Finished difference Result 1931 states and 2363 transitions. [2022-11-16 20:49:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-16 20:49:15,295 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 34 states have internal predecessors, (58), 12 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 137 [2022-11-16 20:49:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:49:15,298 INFO L225 Difference]: With dead ends: 1931 [2022-11-16 20:49:15,298 INFO L226 Difference]: Without dead ends: 1195 [2022-11-16 20:49:15,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 328 SyntacticMatches, 21 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 62.7s TimeCoverageRelationStatistics Valid=815, Invalid=5191, Unknown=0, NotChecked=0, Total=6006 [2022-11-16 20:49:15,301 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 103 mSDsluCounter, 3114 mSDsCounter, 0 mSdLazyCounter, 2514 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 3305 SdHoareTripleChecker+Invalid, 2907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:49:15,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 3305 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2514 Invalid, 0 Unknown, 358 Unchecked, 6.4s Time] [2022-11-16 20:49:15,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-11-16 20:49:15,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1161. [2022-11-16 20:49:15,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 851 states have (on average 1.198589894242068) internal successors, (1020), 864 states have internal predecessors, (1020), 191 states have call successors, (191), 118 states have call predecessors, (191), 118 states have return successors, (191), 178 states have call predecessors, (191), 191 states have call successors, (191) [2022-11-16 20:49:15,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1402 transitions. [2022-11-16 20:49:15,606 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1402 transitions. Word has length 137 [2022-11-16 20:49:15,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:49:15,607 INFO L495 AbstractCegarLoop]: Abstraction has 1161 states and 1402 transitions. [2022-11-16 20:49:15,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 34 states have internal predecessors, (58), 12 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-16 20:49:15,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1402 transitions. [2022-11-16 20:49:15,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-16 20:49:15,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:49:15,609 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:49:15,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 20:49:15,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:49:15,816 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:49:15,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:49:15,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1566585149, now seen corresponding path program 1 times [2022-11-16 20:49:15,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:49:15,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660259740] [2022-11-16 20:49:15,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:49:15,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:49:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:49:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-16 20:49:16,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:49:16,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660259740] [2022-11-16 20:49:16,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660259740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:49:16,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736824497] [2022-11-16 20:49:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:49:16,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:49:16,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:49:16,614 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:49:16,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6172cc84-518b-474d-ba27-edd33a452d0e/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 20:49:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:49:16,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 20:49:16,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:49:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 65 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-16 20:49:17,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:49:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-16 20:49:17,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736824497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:49:17,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [112389024] [2022-11-16 20:49:17,936 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2022-11-16 20:49:17,936 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:49:17,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:49:17,936 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:49:17,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:49:56,819 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 56 for LOIs [2022-11-16 20:49:56,877 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2022-11-16 20:49:56,886 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 111 for LOIs [2022-11-16 20:49:57,003 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 93 for LOIs [2022-11-16 20:49:57,114 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 124 for LOIs [2022-11-16 20:49:57,349 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 92 for LOIs [2022-11-16 20:49:57,373 INFO L180 IcfgInterpreter]: Interpretation finished