./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba --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 0a05a45e59c4449e0f919ee265abbb6a4949f64a9be713d749d79d0baffd63df --- 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-b5237d8 [2022-11-22 00:31:11,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:31:11,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:31:11,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:31:11,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:31:11,062 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:31:11,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:31:11,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:31:11,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:31:11,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:31:11,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:31:11,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:31:11,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:31:11,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:31:11,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:31:11,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:31:11,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:31:11,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:31:11,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:31:11,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:31:11,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:31:11,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:31:11,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:31:11,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:31:11,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:31:11,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:31:11,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:31:11,117 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:31:11,117 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:31:11,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:31:11,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:31:11,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:31:11,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:31:11,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:31:11,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:31:11,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:31:11,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:31:11,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:31:11,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:31:11,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:31:11,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:31:11,130 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:31:11,169 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:31:11,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:31:11,170 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:31:11,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:31:11,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:31:11,172 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:31:11,172 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:31:11,173 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:31:11,173 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:31:11,173 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:31:11,174 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:31:11,175 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:31:11,175 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:31:11,175 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:31:11,176 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:31:11,176 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:31:11,176 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:31:11,177 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:31:11,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:31:11,178 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:31:11,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:31:11,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:31:11,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:31:11,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:31:11,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:31:11,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:31:11,181 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:31:11,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:31:11,181 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:31:11,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:31:11,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:31:11,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:31:11,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:31:11,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:31:11,183 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:31:11,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:31:11,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:31:11,184 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:31:11,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:31:11,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:31:11,185 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:31:11,186 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_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a05a45e59c4449e0f919ee265abbb6a4949f64a9be713d749d79d0baffd63df [2022-11-22 00:31:11,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:31:11,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:31:11,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:31:11,464 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:31:11,464 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:31:11,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c [2022-11-22 00:31:14,552 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:31:14,840 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:31:14,843 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c [2022-11-22 00:31:14,859 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/data/d5baadce5/82e533e6f35c4e3cb9b47f55c134e293/FLAG132f425a8 [2022-11-22 00:31:14,877 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/data/d5baadce5/82e533e6f35c4e3cb9b47f55c134e293 [2022-11-22 00:31:14,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:31:14,882 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:31:14,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:31:14,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:31:14,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:31:14,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:31:14" (1/1) ... [2022-11-22 00:31:14,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d09a1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:14, skipping insertion in model container [2022-11-22 00:31:14,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:31:14" (1/1) ... [2022-11-22 00:31:14,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:31:14,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:31:15,229 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c[14577,14590] [2022-11-22 00:31:15,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:31:15,250 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:31:15,309 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c[14577,14590] [2022-11-22 00:31:15,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:31:15,325 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:31:15,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:15 WrapperNode [2022-11-22 00:31:15,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:31:15,327 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:31:15,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:31:15,327 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:31:15,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:15" (1/1) ... [2022-11-22 00:31:15,346 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:15" (1/1) ... [2022-11-22 00:31:15,385 INFO L138 Inliner]: procedures = 32, calls = 47, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 480 [2022-11-22 00:31:15,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:31:15,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:31:15,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:31:15,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:31:15,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:15" (1/1) ... [2022-11-22 00:31:15,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:15" (1/1) ... [2022-11-22 00:31:15,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:15" (1/1) ... [2022-11-22 00:31:15,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:15" (1/1) ... [2022-11-22 00:31:15,424 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:15" (1/1) ... [2022-11-22 00:31:15,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:15" (1/1) ... [2022-11-22 00:31:15,432 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:15" (1/1) ... [2022-11-22 00:31:15,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:15" (1/1) ... [2022-11-22 00:31:15,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:31:15,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:31:15,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:31:15,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:31:15,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:15" (1/1) ... [2022-11-22 00:31:15,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:31:15,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:31:15,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:31:15,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:31:15,534 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2022-11-22 00:31:15,535 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2022-11-22 00:31:15,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:31:15,535 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2022-11-22 00:31:15,535 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2022-11-22 00:31:15,535 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-11-22 00:31:15,535 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-11-22 00:31:15,536 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 00:31:15,536 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 00:31:15,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:31:15,536 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2022-11-22 00:31:15,536 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2022-11-22 00:31:15,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:31:15,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:31:15,537 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2022-11-22 00:31:15,537 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2022-11-22 00:31:15,690 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:31:15,693 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:31:16,381 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:31:16,645 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:31:16,645 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 00:31:16,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:31:16 BoogieIcfgContainer [2022-11-22 00:31:16,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:31:16,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:31:16,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:31:16,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:31:16,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:31:14" (1/3) ... [2022-11-22 00:31:16,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed411bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:31:16, skipping insertion in model container [2022-11-22 00:31:16,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:15" (2/3) ... [2022-11-22 00:31:16,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed411bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:31:16, skipping insertion in model container [2022-11-22 00:31:16,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:31:16" (3/3) ... [2022-11-22 00:31:16,661 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c [2022-11-22 00:31:16,680 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:31:16,682 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:31:16,756 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:31:16,763 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;@6070e6c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:31:16,764 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:31:16,770 INFO L276 IsEmpty]: Start isEmpty. Operand has 141 states, 104 states have (on average 1.5288461538461537) internal successors, (159), 106 states have internal predecessors, (159), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-22 00:31:16,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 00:31:16,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:16,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:16,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:16,789 INFO L85 PathProgramCache]: Analyzing trace with hash -621799585, now seen corresponding path program 1 times [2022-11-22 00:31:16,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:16,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209799494] [2022-11-22 00:31:16,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:16,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:17,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:17,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209799494] [2022-11-22 00:31:17,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209799494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:17,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:17,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:17,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71239511] [2022-11-22 00:31:17,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:17,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:17,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:17,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:17,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:31:17,468 INFO L87 Difference]: Start difference. First operand has 141 states, 104 states have (on average 1.5288461538461537) internal successors, (159), 106 states have internal predecessors, (159), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) 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) [2022-11-22 00:31:17,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:17,654 INFO L93 Difference]: Finished difference Result 282 states and 461 transitions. [2022-11-22 00:31:17,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:31:17,657 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 [2022-11-22 00:31:17,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:17,670 INFO L225 Difference]: With dead ends: 282 [2022-11-22 00:31:17,670 INFO L226 Difference]: Without dead ends: 144 [2022-11-22 00:31:17,681 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 [2022-11-22 00:31:17,686 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 5 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:17,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 593 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-22 00:31:17,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-11-22 00:31:17,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 107 states have (on average 1.4953271028037383) internal successors, (160), 108 states have internal predecessors, (160), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-22 00:31:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 218 transitions. [2022-11-22 00:31:17,764 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 218 transitions. Word has length 19 [2022-11-22 00:31:17,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:17,766 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 218 transitions. [2022-11-22 00:31:17,767 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) [2022-11-22 00:31:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 218 transitions. [2022-11-22 00:31:17,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-22 00:31:17,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:17,770 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] [2022-11-22 00:31:17,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:31:17,771 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:17,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:17,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1437511571, now seen corresponding path program 1 times [2022-11-22 00:31:17,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:17,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361114033] [2022-11-22 00:31:17,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:17,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:31:18,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:18,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361114033] [2022-11-22 00:31:18,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361114033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:18,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:18,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 00:31:18,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254547289] [2022-11-22 00:31:18,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:18,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:31:18,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:18,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:31:18,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:18,005 INFO L87 Difference]: Start difference. First operand 144 states and 218 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:31:18,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:18,364 INFO L93 Difference]: Finished difference Result 402 states and 621 transitions. [2022-11-22 00:31:18,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:31:18,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2022-11-22 00:31:18,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:18,373 INFO L225 Difference]: With dead ends: 402 [2022-11-22 00:31:18,374 INFO L226 Difference]: Without dead ends: 261 [2022-11-22 00:31:18,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:31:18,382 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 521 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:18,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 549 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:31:18,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-22 00:31:18,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 170. [2022-11-22 00:31:18,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 131 states have (on average 1.4885496183206106) internal successors, (195), 131 states have internal predecessors, (195), 30 states have call successors, (30), 8 states have call predecessors, (30), 8 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-22 00:31:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 255 transitions. [2022-11-22 00:31:18,431 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 255 transitions. Word has length 30 [2022-11-22 00:31:18,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:18,432 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 255 transitions. [2022-11-22 00:31:18,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:31:18,432 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 255 transitions. [2022-11-22 00:31:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-22 00:31:18,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:18,433 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] [2022-11-22 00:31:18,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 00:31:18,434 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:18,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:18,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1628500186, now seen corresponding path program 1 times [2022-11-22 00:31:18,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:18,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535060451] [2022-11-22 00:31:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:18,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:31:18,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:18,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535060451] [2022-11-22 00:31:18,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535060451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:18,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:18,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 00:31:18,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666316401] [2022-11-22 00:31:18,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:18,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:31:18,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:18,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:31:18,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:18,614 INFO L87 Difference]: Start difference. First operand 170 states and 255 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:31:18,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:18,890 INFO L93 Difference]: Finished difference Result 402 states and 619 transitions. [2022-11-22 00:31:18,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:31:18,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2022-11-22 00:31:18,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:18,894 INFO L225 Difference]: With dead ends: 402 [2022-11-22 00:31:18,894 INFO L226 Difference]: Without dead ends: 261 [2022-11-22 00:31:18,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:31:18,902 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 517 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:18,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 552 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:31:18,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-22 00:31:18,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 170. [2022-11-22 00:31:18,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 131 states have (on average 1.4809160305343512) internal successors, (194), 131 states have internal predecessors, (194), 30 states have call successors, (30), 8 states have call predecessors, (30), 8 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-22 00:31:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 254 transitions. [2022-11-22 00:31:18,935 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 254 transitions. Word has length 31 [2022-11-22 00:31:18,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:18,936 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 254 transitions. [2022-11-22 00:31:18,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:31:18,936 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 254 transitions. [2022-11-22 00:31:18,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-22 00:31:18,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:18,937 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] [2022-11-22 00:31:18,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 00:31:18,938 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:18,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:18,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1610746453, now seen corresponding path program 1 times [2022-11-22 00:31:18,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:18,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088451231] [2022-11-22 00:31:18,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:18,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:31:19,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:19,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088451231] [2022-11-22 00:31:19,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088451231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:19,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:19,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:19,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998661481] [2022-11-22 00:31:19,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:19,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:19,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:19,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:19,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:31:19,150 INFO L87 Difference]: Start difference. First operand 170 states and 254 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-11-22 00:31:19,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:19,223 INFO L93 Difference]: Finished difference Result 316 states and 475 transitions. [2022-11-22 00:31:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:31:19,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 33 [2022-11-22 00:31:19,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:19,226 INFO L225 Difference]: With dead ends: 316 [2022-11-22 00:31:19,226 INFO L226 Difference]: Without dead ends: 175 [2022-11-22 00:31:19,227 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 [2022-11-22 00:31:19,227 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 6 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 605 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 [2022-11-22 00:31:19,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 605 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:31:19,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-22 00:31:19,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-11-22 00:31:19,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 135 states have (on average 1.4666666666666666) internal successors, (198), 135 states have internal predecessors, (198), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-22 00:31:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 258 transitions. [2022-11-22 00:31:19,247 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 258 transitions. Word has length 33 [2022-11-22 00:31:19,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:19,248 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 258 transitions. [2022-11-22 00:31:19,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-11-22 00:31:19,248 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 258 transitions. [2022-11-22 00:31:19,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 00:31:19,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:19,250 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] [2022-11-22 00:31:19,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 00:31:19,250 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:19,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:19,251 INFO L85 PathProgramCache]: Analyzing trace with hash -693743727, now seen corresponding path program 1 times [2022-11-22 00:31:19,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:19,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483511695] [2022-11-22 00:31:19,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:19,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:31:19,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:19,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483511695] [2022-11-22 00:31:19,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483511695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:19,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:19,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:19,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358994151] [2022-11-22 00:31:19,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:19,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:19,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:19,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:19,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:31:19,420 INFO L87 Difference]: Start difference. First operand 175 states and 258 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-11-22 00:31:19,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:19,501 INFO L93 Difference]: Finished difference Result 326 states and 486 transitions. [2022-11-22 00:31:19,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:31:19,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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 41 [2022-11-22 00:31:19,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:19,505 INFO L225 Difference]: With dead ends: 326 [2022-11-22 00:31:19,505 INFO L226 Difference]: Without dead ends: 180 [2022-11-22 00:31:19,507 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 [2022-11-22 00:31:19,508 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 6 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:19,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 591 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:19,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-22 00:31:19,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-11-22 00:31:19,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 139 states have (on average 1.4532374100719425) internal successors, (202), 139 states have internal predecessors, (202), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-22 00:31:19,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 262 transitions. [2022-11-22 00:31:19,534 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 262 transitions. Word has length 41 [2022-11-22 00:31:19,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:19,535 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 262 transitions. [2022-11-22 00:31:19,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-11-22 00:31:19,536 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 262 transitions. [2022-11-22 00:31:19,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-22 00:31:19,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:19,543 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, 1, 1, 1, 1, 1] [2022-11-22 00:31:19,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 00:31:19,544 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:19,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:19,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1402099173, now seen corresponding path program 1 times [2022-11-22 00:31:19,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:19,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871933169] [2022-11-22 00:31:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:19,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:31:19,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:19,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871933169] [2022-11-22 00:31:19,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871933169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:19,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:19,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:19,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672741137] [2022-11-22 00:31:19,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:19,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:19,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:19,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:19,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:31:19,713 INFO L87 Difference]: Start difference. First operand 180 states and 262 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-11-22 00:31:19,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:19,807 INFO L93 Difference]: Finished difference Result 335 states and 490 transitions. [2022-11-22 00:31:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:31:19,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 49 [2022-11-22 00:31:19,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:19,810 INFO L225 Difference]: With dead ends: 335 [2022-11-22 00:31:19,810 INFO L226 Difference]: Without dead ends: 184 [2022-11-22 00:31:19,811 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 [2022-11-22 00:31:19,812 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 5 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:19,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 600 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:19,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-22 00:31:19,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-11-22 00:31:19,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 142 states have (on average 1.443661971830986) internal successors, (205), 142 states have internal predecessors, (205), 30 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-22 00:31:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 265 transitions. [2022-11-22 00:31:19,829 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 265 transitions. Word has length 49 [2022-11-22 00:31:19,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:19,830 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 265 transitions. [2022-11-22 00:31:19,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-11-22 00:31:19,830 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 265 transitions. [2022-11-22 00:31:19,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-22 00:31:19,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:19,831 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:19,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 00:31:19,831 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:19,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:19,832 INFO L85 PathProgramCache]: Analyzing trace with hash 994360130, now seen corresponding path program 1 times [2022-11-22 00:31:19,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:19,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376499284] [2022-11-22 00:31:19,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:19,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:31:19,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:19,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376499284] [2022-11-22 00:31:19,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376499284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:19,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:19,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:19,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253013509] [2022-11-22 00:31:19,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:19,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:19,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:19,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:19,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:31:19,998 INFO L87 Difference]: Start difference. First operand 184 states and 265 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-11-22 00:31:20,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:20,071 INFO L93 Difference]: Finished difference Result 344 states and 500 transitions. [2022-11-22 00:31:20,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:31:20,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 49 [2022-11-22 00:31:20,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:20,073 INFO L225 Difference]: With dead ends: 344 [2022-11-22 00:31:20,073 INFO L226 Difference]: Without dead ends: 189 [2022-11-22 00:31:20,074 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 [2022-11-22 00:31:20,074 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 6 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:20,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 591 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:31:20,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-22 00:31:20,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-11-22 00:31:20,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 146 states have (on average 1.4315068493150684) internal successors, (209), 146 states have internal predecessors, (209), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-22 00:31:20,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 269 transitions. [2022-11-22 00:31:20,090 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 269 transitions. Word has length 49 [2022-11-22 00:31:20,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:20,091 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 269 transitions. [2022-11-22 00:31:20,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-11-22 00:31:20,091 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 269 transitions. [2022-11-22 00:31:20,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-22 00:31:20,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:20,093 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, 1, 1, 1, 1, 1] [2022-11-22 00:31:20,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 00:31:20,093 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:20,094 INFO L85 PathProgramCache]: Analyzing trace with hash -837012826, now seen corresponding path program 1 times [2022-11-22 00:31:20,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:20,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465707321] [2022-11-22 00:31:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:20,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 00:31:20,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:20,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465707321] [2022-11-22 00:31:20,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465707321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:20,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:20,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:20,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577082507] [2022-11-22 00:31:20,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:20,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:20,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:20,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:20,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:31:20,316 INFO L87 Difference]: Start difference. First operand 189 states and 269 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-11-22 00:31:20,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:20,386 INFO L93 Difference]: Finished difference Result 355 states and 507 transitions. [2022-11-22 00:31:20,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:31:20,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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 57 [2022-11-22 00:31:20,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:20,393 INFO L225 Difference]: With dead ends: 355 [2022-11-22 00:31:20,393 INFO L226 Difference]: Without dead ends: 195 [2022-11-22 00:31:20,394 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 [2022-11-22 00:31:20,395 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 7 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:20,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 602 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:31:20,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-22 00:31:20,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-11-22 00:31:20,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 151 states have (on average 1.4172185430463575) internal successors, (214), 151 states have internal predecessors, (214), 30 states have call successors, (30), 13 states have call predecessors, (30), 13 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-22 00:31:20,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 274 transitions. [2022-11-22 00:31:20,416 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 274 transitions. Word has length 57 [2022-11-22 00:31:20,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:20,416 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 274 transitions. [2022-11-22 00:31:20,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-11-22 00:31:20,417 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 274 transitions. [2022-11-22 00:31:20,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-22 00:31:20,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:20,418 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, 1] [2022-11-22 00:31:20,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 00:31:20,419 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:20,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:20,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1386269671, now seen corresponding path program 1 times [2022-11-22 00:31:20,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:20,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055114438] [2022-11-22 00:31:20,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:20,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 00:31:20,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:20,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055114438] [2022-11-22 00:31:20,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055114438] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:31:20,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122661095] [2022-11-22 00:31:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:20,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:31:20,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:31:20,914 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:31:20,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:31:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:21,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 00:31:21,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:31:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:31:21,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:31:21,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122661095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:21,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:31:21,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-11-22 00:31:21,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313325259] [2022-11-22 00:31:21,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:21,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:31:21,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:21,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:31:21,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-22 00:31:21,383 INFO L87 Difference]: Start difference. First operand 195 states and 274 transitions. Second operand has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 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) [2022-11-22 00:31:21,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:21,698 INFO L93 Difference]: Finished difference Result 566 states and 787 transitions. [2022-11-22 00:31:21,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 00:31:21,699 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 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 60 [2022-11-22 00:31:21,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:21,701 INFO L225 Difference]: With dead ends: 566 [2022-11-22 00:31:21,701 INFO L226 Difference]: Without dead ends: 374 [2022-11-22 00:31:21,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-11-22 00:31:21,703 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 217 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:21,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 1098 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:31:21,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-22 00:31:21,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 371. [2022-11-22 00:31:21,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 285 states have (on average 1.407017543859649) internal successors, (401), 286 states have internal predecessors, (401), 59 states have call successors, (59), 26 states have call predecessors, (59), 26 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2022-11-22 00:31:21,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 519 transitions. [2022-11-22 00:31:21,736 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 519 transitions. Word has length 60 [2022-11-22 00:31:21,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:21,736 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 519 transitions. [2022-11-22 00:31:21,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 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) [2022-11-22 00:31:21,736 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 519 transitions. [2022-11-22 00:31:21,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-22 00:31:21,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:21,738 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, 1, 1, 1] [2022-11-22 00:31:21,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 00:31:21,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:31:21,945 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:21,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:21,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1016926634, now seen corresponding path program 1 times [2022-11-22 00:31:21,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:21,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504562610] [2022-11-22 00:31:21,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:21,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 00:31:22,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:22,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504562610] [2022-11-22 00:31:22,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504562610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:31:22,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810738731] [2022-11-22 00:31:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:22,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:31:22,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:31:22,409 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:31:22,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:31:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:22,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 00:31:22,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:31:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:22,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:31:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 00:31:23,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810738731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:31:23,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1753052885] [2022-11-22 00:31:23,195 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-11-22 00:31:23,195 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:31:23,199 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:31:23,204 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:31:23,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:31:28,008 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-22 00:31:28,050 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-22 00:31:28,082 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-22 00:31:28,164 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:31:46,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1753052885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:46,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:31:46,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2022-11-22 00:31:46,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766303483] [2022-11-22 00:31:46,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:46,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 00:31:46,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:46,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 00:31:46,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 00:31:46,926 INFO L87 Difference]: Start difference. First operand 371 states and 519 transitions. Second operand has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 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) [2022-11-22 00:31:53,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:53,709 INFO L93 Difference]: Finished difference Result 802 states and 1132 transitions. [2022-11-22 00:31:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 00:31:53,710 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 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 62 [2022-11-22 00:31:53,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:53,721 INFO L225 Difference]: With dead ends: 802 [2022-11-22 00:31:53,721 INFO L226 Difference]: Without dead ends: 456 [2022-11-22 00:31:53,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 00:31:53,723 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 174 mSDsluCounter, 3027 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 3311 SdHoareTripleChecker+Invalid, 2088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:53,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 3311 Invalid, 2088 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [37 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-22 00:31:53,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-11-22 00:31:53,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 433. [2022-11-22 00:31:53,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 329 states have (on average 1.3799392097264438) internal successors, (454), 330 states have internal predecessors, (454), 74 states have call successors, (74), 29 states have call predecessors, (74), 29 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-22 00:31:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 602 transitions. [2022-11-22 00:31:53,809 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 602 transitions. Word has length 62 [2022-11-22 00:31:53,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:53,809 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 602 transitions. [2022-11-22 00:31:53,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 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) [2022-11-22 00:31:53,810 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 602 transitions. [2022-11-22 00:31:53,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-22 00:31:53,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:53,811 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, 1, 1, 1] [2022-11-22 00:31:53,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:31:54,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 00:31:54,017 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:54,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:54,018 INFO L85 PathProgramCache]: Analyzing trace with hash -905474981, now seen corresponding path program 1 times [2022-11-22 00:31:54,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:54,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878921865] [2022-11-22 00:31:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:54,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 00:31:54,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:54,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878921865] [2022-11-22 00:31:54,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878921865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:31:54,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386862251] [2022-11-22 00:31:54,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:54,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:31:54,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:31:54,469 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:31:54,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:31:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:54,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 00:31:54,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:31:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:54,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:31:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 00:31:55,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386862251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:31:55,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [266928786] [2022-11-22 00:31:55,083 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-11-22 00:31:55,085 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:31:55,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:31:55,086 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:31:55,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:31:57,696 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-22 00:31:57,725 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-22 00:31:57,742 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-22 00:31:57,791 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:32:14,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [266928786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:32:14,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:32:14,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2022-11-22 00:32:14,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844263376] [2022-11-22 00:32:14,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:32:14,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 00:32:14,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:32:14,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 00:32:14,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 00:32:14,212 INFO L87 Difference]: Start difference. First operand 433 states and 602 transitions. Second operand has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 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) [2022-11-22 00:32:20,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:32:20,070 INFO L93 Difference]: Finished difference Result 845 states and 1187 transitions. [2022-11-22 00:32:20,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 00:32:20,071 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 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 62 [2022-11-22 00:32:20,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:32:20,074 INFO L225 Difference]: With dead ends: 845 [2022-11-22 00:32:20,074 INFO L226 Difference]: Without dead ends: 506 [2022-11-22 00:32:20,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 154 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 00:32:20,076 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 78 mSDsluCounter, 2688 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 2955 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:32:20,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 2955 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1842 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-22 00:32:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-11-22 00:32:20,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 483. [2022-11-22 00:32:20,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 362 states have (on average 1.3646408839779005) internal successors, (494), 363 states have internal predecessors, (494), 88 states have call successors, (88), 32 states have call predecessors, (88), 32 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) [2022-11-22 00:32:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 670 transitions. [2022-11-22 00:32:20,176 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 670 transitions. Word has length 62 [2022-11-22 00:32:20,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:32:20,176 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 670 transitions. [2022-11-22 00:32:20,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 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) [2022-11-22 00:32:20,177 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 670 transitions. [2022-11-22 00:32:20,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-22 00:32:20,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:32:20,178 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, 1, 1, 1, 1, 1] [2022-11-22 00:32:20,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:32:20,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 00:32:20,385 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:32:20,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:32:20,385 INFO L85 PathProgramCache]: Analyzing trace with hash 638152030, now seen corresponding path program 1 times [2022-11-22 00:32:20,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:32:20,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656176885] [2022-11-22 00:32:20,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:20,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:32:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 00:32:20,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:32:20,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656176885] [2022-11-22 00:32:20,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656176885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:32:20,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530218779] [2022-11-22 00:32:20,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:20,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:20,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:32:20,787 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:32:20,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:32:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:20,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 00:32:20,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:32:21,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:32:21,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:32:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 00:32:21,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530218779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:32:21,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [445198497] [2022-11-22 00:32:21,373 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2022-11-22 00:32:21,373 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:32:21,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:32:21,373 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:32:21,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:32:24,183 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-22 00:32:24,207 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-22 00:32:24,224 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-22 00:32:24,273 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:32:44,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [445198497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:32:44,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:32:44,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [9, 9, 9] total 38 [2022-11-22 00:32:44,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439518302] [2022-11-22 00:32:44,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:32:44,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-22 00:32:44,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:32:44,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-22 00:32:44,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 00:32:44,201 INFO L87 Difference]: Start difference. First operand 483 states and 670 transitions. Second operand has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 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) [2022-11-22 00:32:50,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:32:50,690 INFO L93 Difference]: Finished difference Result 895 states and 1258 transitions. [2022-11-22 00:32:50,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-22 00:32:50,691 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 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 64 [2022-11-22 00:32:50,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:32:50,694 INFO L225 Difference]: With dead ends: 895 [2022-11-22 00:32:50,694 INFO L226 Difference]: Without dead ends: 556 [2022-11-22 00:32:50,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 156 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 00:32:50,696 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 154 mSDsluCounter, 3148 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 3447 SdHoareTripleChecker+Invalid, 2064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:32:50,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 3447 Invalid, 2064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2028 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-22 00:32:50,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-11-22 00:32:50,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 507. [2022-11-22 00:32:50,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 378 states have (on average 1.3465608465608465) internal successors, (509), 379 states have internal predecessors, (509), 94 states have call successors, (94), 34 states have call predecessors, (94), 34 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-22 00:32:50,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 697 transitions. [2022-11-22 00:32:50,804 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 697 transitions. Word has length 64 [2022-11-22 00:32:50,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:32:50,804 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 697 transitions. [2022-11-22 00:32:50,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 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) [2022-11-22 00:32:50,805 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 697 transitions. [2022-11-22 00:32:50,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-22 00:32:50,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:32:50,806 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] [2022-11-22 00:32:50,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:32:51,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:51,012 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:32:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:32:51,012 INFO L85 PathProgramCache]: Analyzing trace with hash -213509607, now seen corresponding path program 1 times [2022-11-22 00:32:51,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:32:51,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694834610] [2022-11-22 00:32:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:51,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:32:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:32:51,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:32:51,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694834610] [2022-11-22 00:32:51,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694834610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:32:51,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:32:51,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:32:51,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260806649] [2022-11-22 00:32:51,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:32:51,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:32:51,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:32:51,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:32:51,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:32:51,152 INFO L87 Difference]: Start difference. First operand 507 states and 697 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-11-22 00:32:51,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:32:51,336 INFO L93 Difference]: Finished difference Result 906 states and 1272 transitions. [2022-11-22 00:32:51,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:32:51,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 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 66 [2022-11-22 00:32:51,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:32:51,342 INFO L225 Difference]: With dead ends: 906 [2022-11-22 00:32:51,342 INFO L226 Difference]: Without dead ends: 515 [2022-11-22 00:32:51,343 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 [2022-11-22 00:32:51,344 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 5 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:32:51,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 600 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:32:51,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-11-22 00:32:51,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2022-11-22 00:32:51,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 384 states have (on average 1.3411458333333333) internal successors, (515), 385 states have internal predecessors, (515), 94 states have call successors, (94), 36 states have call predecessors, (94), 36 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-22 00:32:51,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 703 transitions. [2022-11-22 00:32:51,474 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 703 transitions. Word has length 66 [2022-11-22 00:32:51,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:32:51,474 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 703 transitions. [2022-11-22 00:32:51,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-11-22 00:32:51,474 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 703 transitions. [2022-11-22 00:32:51,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-22 00:32:51,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:32:51,482 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, 1, 1, 1, 1, 1] [2022-11-22 00:32:51,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 00:32:51,482 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:32:51,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:32:51,483 INFO L85 PathProgramCache]: Analyzing trace with hash 670785818, now seen corresponding path program 1 times [2022-11-22 00:32:51,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:32:51,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900548404] [2022-11-22 00:32:51,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:51,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:32:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:32:51,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:32:51,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900548404] [2022-11-22 00:32:51,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900548404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:32:51,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787547167] [2022-11-22 00:32:51,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:51,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:51,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:32:51,907 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:32:51,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:32:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:52,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 00:32:52,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:32:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:32:52,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:32:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:32:52,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787547167] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:32:52,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [142748140] [2022-11-22 00:32:52,468 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2022-11-22 00:32:52,468 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:32:52,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:32:52,468 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:32:52,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:32:57,514 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 231 for LOIs [2022-11-22 00:32:57,731 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-22 00:32:57,749 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 182 for LOIs [2022-11-22 00:32:57,923 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 154 for LOIs [2022-11-22 00:32:57,963 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-11-22 00:32:58,011 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-22 00:32:58,058 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:33:48,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15790#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s2p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~s2s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~s1s1_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (- 256)))) (<= 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) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (not (= (mod ~side2Failed~0 256) 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) (= ~side1_written~0 1) (= ~s1s2~0 0) (= ~nomsg~0 ~s2p_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (- 256))) ~s1s2_old~0) (<= (+ 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) (= ~s1p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (- 256)))) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~nomsg~0 ~side2_written~0) (<= ~manual_selection_History_2~0 0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (= ~nomsg~0 ~s2s2_new~0) (= (mod ~side1Failed~0 256) 0) (= ~nomsg~0 ~cs2_new~0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256))) ~s2s1_old~0) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-22 00:33:48,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:33:48,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:33:48,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-22 00:33:48,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884469441] [2022-11-22 00:33:48,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:33:48,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 00:33:48,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:33:48,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 00:33:48,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=2619, Unknown=0, NotChecked=0, Total=2970 [2022-11-22 00:33:48,933 INFO L87 Difference]: Start difference. First operand 515 states and 703 transitions. Second operand has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 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) [2022-11-22 00:33:49,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:49,644 INFO L93 Difference]: Finished difference Result 1236 states and 1718 transitions. [2022-11-22 00:33:49,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 00:33:49,645 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 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 70 [2022-11-22 00:33:49,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:49,650 INFO L225 Difference]: With dead ends: 1236 [2022-11-22 00:33:49,650 INFO L226 Difference]: Without dead ends: 853 [2022-11-22 00:33:49,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 150 SyntacticMatches, 15 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 51.1s TimeCoverageRelationStatistics Valid=397, Invalid=3143, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 00:33:49,653 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 298 mSDsluCounter, 2040 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 2369 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:49,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 2369 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 00:33:49,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-11-22 00:33:49,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 532. [2022-11-22 00:33:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 394 states have (on average 1.2944162436548223) internal successors, (510), 396 states have internal predecessors, (510), 92 states have call successors, (92), 45 states have call predecessors, (92), 45 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-22 00:33:49,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 694 transitions. [2022-11-22 00:33:49,823 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 694 transitions. Word has length 70 [2022-11-22 00:33:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:49,823 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 694 transitions. [2022-11-22 00:33:49,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 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) [2022-11-22 00:33:49,824 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 694 transitions. [2022-11-22 00:33:49,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-22 00:33:49,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:49,826 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, 1, 1, 1] [2022-11-22 00:33:49,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:50,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 00:33:50,036 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:33:50,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:50,036 INFO L85 PathProgramCache]: Analyzing trace with hash -757200530, now seen corresponding path program 1 times [2022-11-22 00:33:50,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:33:50,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115690306] [2022-11-22 00:33:50,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:50,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:33:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:33:50,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:33:50,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115690306] [2022-11-22 00:33:50,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115690306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:33:50,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:33:50,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 00:33:50,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111907190] [2022-11-22 00:33:50,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:50,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:33:50,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:33:50,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:33:50,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:33:50,378 INFO L87 Difference]: Start difference. First operand 532 states and 694 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 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) [2022-11-22 00:33:51,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:51,304 INFO L93 Difference]: Finished difference Result 1170 states and 1609 transitions. [2022-11-22 00:33:51,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 00:33:51,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 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 71 [2022-11-22 00:33:51,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:51,309 INFO L225 Difference]: With dead ends: 1170 [2022-11-22 00:33:51,309 INFO L226 Difference]: Without dead ends: 876 [2022-11-22 00:33:51,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-22 00:33:51,311 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 530 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:51,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 2248 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:33:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-11-22 00:33:51,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 671. [2022-11-22 00:33:51,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 496 states have (on average 1.3064516129032258) internal successors, (648), 499 states have internal predecessors, (648), 116 states have call successors, (116), 58 states have call predecessors, (116), 58 states have return successors, (116), 113 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-22 00:33:51,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 880 transitions. [2022-11-22 00:33:51,513 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 880 transitions. Word has length 71 [2022-11-22 00:33:51,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:51,513 INFO L495 AbstractCegarLoop]: Abstraction has 671 states and 880 transitions. [2022-11-22 00:33:51,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 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) [2022-11-22 00:33:51,514 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 880 transitions. [2022-11-22 00:33:51,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 00:33:51,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:51,517 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, 1, 1, 1, 1, 1] [2022-11-22 00:33:51,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-22 00:33:51,517 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:33:51,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:51,518 INFO L85 PathProgramCache]: Analyzing trace with hash -99513804, now seen corresponding path program 1 times [2022-11-22 00:33:51,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:33:51,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135783591] [2022-11-22 00:33:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:51,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:33:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:33:51,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:33:51,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135783591] [2022-11-22 00:33:51,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135783591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:33:51,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:33:51,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 00:33:51,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616408203] [2022-11-22 00:33:51,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:51,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:33:51,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:33:51,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:33:51,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:33:51,807 INFO L87 Difference]: Start difference. First operand 671 states and 880 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 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) [2022-11-22 00:33:52,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:52,801 INFO L93 Difference]: Finished difference Result 1540 states and 2122 transitions. [2022-11-22 00:33:52,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 00:33:52,801 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 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 73 [2022-11-22 00:33:52,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:52,807 INFO L225 Difference]: With dead ends: 1540 [2022-11-22 00:33:52,807 INFO L226 Difference]: Without dead ends: 1211 [2022-11-22 00:33:52,808 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 [2022-11-22 00:33:52,809 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 746 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:52,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [752 Valid, 1389 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:33:52,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2022-11-22 00:33:53,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 927. [2022-11-22 00:33:53,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 679 states have (on average 1.3136966126656848) internal successors, (892), 684 states have internal predecessors, (892), 165 states have call successors, (165), 82 states have call predecessors, (165), 82 states have return successors, (165), 160 states have call predecessors, (165), 165 states have call successors, (165) [2022-11-22 00:33:53,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1222 transitions. [2022-11-22 00:33:53,053 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1222 transitions. Word has length 73 [2022-11-22 00:33:53,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:53,054 INFO L495 AbstractCegarLoop]: Abstraction has 927 states and 1222 transitions. [2022-11-22 00:33:53,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 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) [2022-11-22 00:33:53,054 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1222 transitions. [2022-11-22 00:33:53,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-22 00:33:53,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:53,056 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, 1, 1, 1, 1, 1] [2022-11-22 00:33:53,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-22 00:33:53,056 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:33:53,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:53,057 INFO L85 PathProgramCache]: Analyzing trace with hash -837446945, now seen corresponding path program 1 times [2022-11-22 00:33:53,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:33:53,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222260661] [2022-11-22 00:33:53,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:53,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:33:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 00:33:53,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:33:53,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222260661] [2022-11-22 00:33:53,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222260661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:33:53,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818283677] [2022-11-22 00:33:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:53,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:53,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:33:53,391 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:33:53,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:33:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:53,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 00:33:53,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:33:53,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:33:53,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818283677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:33:53,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:33:53,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-22 00:33:53,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33317693] [2022-11-22 00:33:53,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:53,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:33:53,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:33:53,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:33:53,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-22 00:33:53,664 INFO L87 Difference]: Start difference. First operand 927 states and 1222 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 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) [2022-11-22 00:33:54,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:54,455 INFO L93 Difference]: Finished difference Result 1783 states and 2415 transitions. [2022-11-22 00:33:54,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 00:33:54,456 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 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 77 [2022-11-22 00:33:54,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:54,461 INFO L225 Difference]: With dead ends: 1783 [2022-11-22 00:33:54,461 INFO L226 Difference]: Without dead ends: 1090 [2022-11-22 00:33:54,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-22 00:33:54,464 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 486 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:54,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1561 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 00:33:54,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-11-22 00:33:54,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 927. [2022-11-22 00:33:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 679 states have (on average 1.3078055964653903) internal successors, (888), 684 states have internal predecessors, (888), 165 states have call successors, (165), 82 states have call predecessors, (165), 82 states have return successors, (165), 160 states have call predecessors, (165), 165 states have call successors, (165) [2022-11-22 00:33:54,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1218 transitions. [2022-11-22 00:33:54,725 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1218 transitions. Word has length 77 [2022-11-22 00:33:54,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:54,726 INFO L495 AbstractCegarLoop]: Abstraction has 927 states and 1218 transitions. [2022-11-22 00:33:54,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 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) [2022-11-22 00:33:54,726 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1218 transitions. [2022-11-22 00:33:54,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-22 00:33:54,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:54,728 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, 1, 1, 1, 1, 1] [2022-11-22 00:33:54,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:54,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 00:33:54,934 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:33:54,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:54,935 INFO L85 PathProgramCache]: Analyzing trace with hash -117293042, now seen corresponding path program 1 times [2022-11-22 00:33:54,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:33:54,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035921324] [2022-11-22 00:33:54,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:54,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:33:55,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 00:33:55,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:33:55,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035921324] [2022-11-22 00:33:55,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035921324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:33:55,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351124844] [2022-11-22 00:33:55,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:55,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:55,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:33:55,320 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:33:55,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 00:33:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:55,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 00:33:55,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 00:33:55,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 00:33:55,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351124844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:55,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [273713935] [2022-11-22 00:33:55,711 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-11-22 00:33:55,711 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:33:55,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:33:55,712 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:33:55,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:34:00,174 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-22 00:34:00,221 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-22 00:34:00,257 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-11-22 00:34:00,342 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-22 00:34:00,387 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:34:31,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [273713935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:34:31,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:34:31,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [8, 9, 9] total 47 [2022-11-22 00:34:31,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101940813] [2022-11-22 00:34:31,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:34:31,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-22 00:34:31,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:34:31,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-22 00:34:31,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1977, Unknown=0, NotChecked=0, Total=2162 [2022-11-22 00:34:31,018 INFO L87 Difference]: Start difference. First operand 927 states and 1218 transitions. Second operand has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 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) [2022-11-22 00:34:38,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:34:38,605 INFO L93 Difference]: Finished difference Result 1489 states and 1977 transitions. [2022-11-22 00:34:38,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-22 00:34:38,606 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 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 77 [2022-11-22 00:34:38,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:34:38,610 INFO L225 Difference]: With dead ends: 1489 [2022-11-22 00:34:38,610 INFO L226 Difference]: Without dead ends: 913 [2022-11-22 00:34:38,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=202, Invalid=2150, Unknown=0, NotChecked=0, Total=2352 [2022-11-22 00:34:38,613 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 172 mSDsluCounter, 2799 mSDsCounter, 0 mSdLazyCounter, 2415 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 3013 SdHoareTripleChecker+Invalid, 2462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-22 00:34:38,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 3013 Invalid, 2462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2415 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-22 00:34:38,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-11-22 00:34:38,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 913. [2022-11-22 00:34:38,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 669 states have (on average 1.3064275037369208) internal successors, (874), 674 states have internal predecessors, (874), 162 states have call successors, (162), 81 states have call predecessors, (162), 81 states have return successors, (162), 157 states have call predecessors, (162), 162 states have call successors, (162) [2022-11-22 00:34:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1198 transitions. [2022-11-22 00:34:38,857 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1198 transitions. Word has length 77 [2022-11-22 00:34:38,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:34:38,858 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 1198 transitions. [2022-11-22 00:34:38,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 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) [2022-11-22 00:34:38,858 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1198 transitions. [2022-11-22 00:34:38,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-22 00:34:38,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:34:38,860 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, 1, 1, 1, 1, 1] [2022-11-22 00:34:38,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 00:34:39,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:34:39,066 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:34:39,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:34:39,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2012814036, now seen corresponding path program 1 times [2022-11-22 00:34:39,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:34:39,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107594460] [2022-11-22 00:34:39,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:34:39,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:34:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:34:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 00:34:39,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:34:39,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107594460] [2022-11-22 00:34:39,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107594460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:34:39,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:34:39,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:34:39,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797664557] [2022-11-22 00:34:39,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:34:39,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:34:39,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:34:39,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:34:39,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:34:39,290 INFO L87 Difference]: Start difference. First operand 913 states and 1198 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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) [2022-11-22 00:34:39,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:34:39,768 INFO L93 Difference]: Finished difference Result 1201 states and 1645 transitions. [2022-11-22 00:34:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:34:39,769 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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 80 [2022-11-22 00:34:39,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:34:39,774 INFO L225 Difference]: With dead ends: 1201 [2022-11-22 00:34:39,774 INFO L226 Difference]: Without dead ends: 1199 [2022-11-22 00:34:39,775 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 [2022-11-22 00:34:39,776 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 155 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:34:39,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 1465 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:34:39,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-11-22 00:34:40,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 914. [2022-11-22 00:34:40,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 668 states have (on average 1.3068862275449102) internal successors, (873), 674 states have internal predecessors, (873), 163 states have call successors, (163), 82 states have call predecessors, (163), 82 states have return successors, (163), 157 states have call predecessors, (163), 163 states have call successors, (163) [2022-11-22 00:34:40,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1199 transitions. [2022-11-22 00:34:40,090 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1199 transitions. Word has length 80 [2022-11-22 00:34:40,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:34:40,091 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1199 transitions. [2022-11-22 00:34:40,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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) [2022-11-22 00:34:40,091 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1199 transitions. [2022-11-22 00:34:40,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-22 00:34:40,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:34:40,093 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, 1, 1, 1, 1, 1] [2022-11-22 00:34:40,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-22 00:34:40,093 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:34:40,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:34:40,094 INFO L85 PathProgramCache]: Analyzing trace with hash 786573589, now seen corresponding path program 1 times [2022-11-22 00:34:40,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:34:40,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497015252] [2022-11-22 00:34:40,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:34:40,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:34:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:34:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 00:34:40,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:34:40,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497015252] [2022-11-22 00:34:40,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497015252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:34:40,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:34:40,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:34:40,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638614124] [2022-11-22 00:34:40,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:34:40,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:34:40,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:34:40,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:34:40,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:34:40,286 INFO L87 Difference]: Start difference. First operand 914 states and 1199 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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) [2022-11-22 00:34:40,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:34:40,596 INFO L93 Difference]: Finished difference Result 1566 states and 2070 transitions. [2022-11-22 00:34:40,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:34:40,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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 83 [2022-11-22 00:34:40,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:34:40,601 INFO L225 Difference]: With dead ends: 1566 [2022-11-22 00:34:40,601 INFO L226 Difference]: Without dead ends: 902 [2022-11-22 00:34:40,603 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 [2022-11-22 00:34:40,604 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 7 mSDsluCounter, 392 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 [2022-11-22 00:34:40,605 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] [2022-11-22 00:34:40,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-11-22 00:34:40,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 902. [2022-11-22 00:34:40,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 662 states have (on average 1.2824773413897281) internal successors, (849), 668 states have internal predecessors, (849), 157 states have call successors, (157), 82 states have call predecessors, (157), 82 states have return successors, (157), 151 states have call predecessors, (157), 157 states have call successors, (157) [2022-11-22 00:34:40,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1163 transitions. [2022-11-22 00:34:40,917 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1163 transitions. Word has length 83 [2022-11-22 00:34:40,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:34:40,918 INFO L495 AbstractCegarLoop]: Abstraction has 902 states and 1163 transitions. [2022-11-22 00:34:40,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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) [2022-11-22 00:34:40,918 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1163 transitions. [2022-11-22 00:34:40,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-22 00:34:40,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:34:40,920 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, 1, 1, 1] [2022-11-22 00:34:40,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-22 00:34:40,920 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:34:40,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:34:40,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1870460879, now seen corresponding path program 1 times [2022-11-22 00:34:40,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:34:40,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42738199] [2022-11-22 00:34:40,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:34:40,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:34:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:34:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 00:34:41,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:34:41,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42738199] [2022-11-22 00:34:41,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42738199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:34:41,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652213792] [2022-11-22 00:34:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:34:41,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:34:41,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:34:41,268 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:34:41,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 00:34:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:34:41,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 00:34:41,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:34:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 00:34:41,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:34:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 00:34:41,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652213792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:34:41,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1563196766] [2022-11-22 00:34:41,671 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-22 00:34:41,671 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:34:41,672 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:34:41,672 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:34:41,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:34:45,635 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-22 00:34:45,667 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-22 00:34:45,688 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-11-22 00:34:45,799 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 152 for LOIs [2022-11-22 00:34:45,846 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-22 00:34:45,893 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:35:25,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1563196766] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:35:25,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:35:25,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [8, 9, 9] total 53 [2022-11-22 00:35:25,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549686159] [2022-11-22 00:35:25,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:35:25,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-22 00:35:25,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:35:25,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-22 00:35:25,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 00:35:25,060 INFO L87 Difference]: Start difference. First operand 902 states and 1163 transitions. Second operand has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 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) [2022-11-22 00:35:35,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:35:35,441 INFO L93 Difference]: Finished difference Result 1515 states and 1985 transitions. [2022-11-22 00:35:35,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-22 00:35:35,442 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 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 85 [2022-11-22 00:35:35,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:35:35,446 INFO L225 Difference]: With dead ends: 1515 [2022-11-22 00:35:35,446 INFO L226 Difference]: Without dead ends: 944 [2022-11-22 00:35:35,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 200 SyntacticMatches, 13 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=258, Invalid=2604, Unknown=0, NotChecked=0, Total=2862 [2022-11-22 00:35:35,449 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 261 mSDsluCounter, 4256 mSDsCounter, 0 mSdLazyCounter, 3768 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 4520 SdHoareTripleChecker+Invalid, 3835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 3768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:35:35,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 4520 Invalid, 3835 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [67 Valid, 3768 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-11-22 00:35:35,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-11-22 00:35:35,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 905. [2022-11-22 00:35:35,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 664 states have (on average 1.2816265060240963) internal successors, (851), 670 states have internal predecessors, (851), 158 states have call successors, (158), 82 states have call predecessors, (158), 82 states have return successors, (158), 152 states have call predecessors, (158), 158 states have call successors, (158) [2022-11-22 00:35:35,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1167 transitions. [2022-11-22 00:35:35,735 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1167 transitions. Word has length 85 [2022-11-22 00:35:35,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:35:35,735 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1167 transitions. [2022-11-22 00:35:35,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 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) [2022-11-22 00:35:35,736 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1167 transitions. [2022-11-22 00:35:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-22 00:35:35,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:35:35,737 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, 1, 1, 1, 1, 1] [2022-11-22 00:35:35,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 00:35:35,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-22 00:35:35,947 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:35:35,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:35:35,947 INFO L85 PathProgramCache]: Analyzing trace with hash -644472428, now seen corresponding path program 1 times [2022-11-22 00:35:35,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:35:35,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891775254] [2022-11-22 00:35:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:35:35,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:35:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:35:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 00:35:36,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:35:36,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891775254] [2022-11-22 00:35:36,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891775254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:35:36,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539374002] [2022-11-22 00:35:36,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:35:36,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:35:36,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:35:36,319 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:35:36,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 00:35:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:35:36,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 00:35:36,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:35:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 00:35:36,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:35:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 00:35:36,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539374002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:35:36,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [958011664] [2022-11-22 00:35:36,935 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-22 00:35:36,935 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:35:36,935 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:35:36,936 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:35:36,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:35:40,885 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 241 for LOIs [2022-11-22 00:35:41,087 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-22 00:35:41,104 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 123 for LOIs [2022-11-22 00:35:41,212 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 157 for LOIs [2022-11-22 00:35:41,247 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 153 for LOIs [2022-11-22 00:35:41,294 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-22 00:35:41,339 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:36:33,436 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41524#(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)))) (<= 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|) (= ~s2s2~0 0) (not (= (mod ~side1Failed_History_0~0 256) 0)) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2p_old~0) (<= 0 ~manual_selection_History_2~0) (= ~side2_written~0 0) (not (= (mod ~side2Failed_History_1~0 256) 0)) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (<= (+ 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) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256)))) (= ~nomsg~0 ~cs2_new~0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (= (mod ~side1Failed_History_1~0 256) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-22 00:36:33,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:36:33,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:36:33,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-22 00:36:33,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567065864] [2022-11-22 00:36:33,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:36:33,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 00:36:33,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:36:33,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 00:36:33,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=3149, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 00:36:33,439 INFO L87 Difference]: Start difference. First operand 905 states and 1167 transitions. Second operand has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 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) [2022-11-22 00:36:34,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:36:34,298 INFO L93 Difference]: Finished difference Result 1858 states and 2462 transitions. [2022-11-22 00:36:34,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 00:36:34,301 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 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 85 [2022-11-22 00:36:34,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:36:34,305 INFO L225 Difference]: With dead ends: 1858 [2022-11-22 00:36:34,305 INFO L226 Difference]: Without dead ends: 1131 [2022-11-22 00:36:34,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 189 SyntacticMatches, 15 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 52.3s TimeCoverageRelationStatistics Valid=439, Invalid=3721, Unknown=0, NotChecked=0, Total=4160 [2022-11-22 00:36:34,308 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 222 mSDsluCounter, 2799 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 3107 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:36:34,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 3107 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 00:36:34,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-11-22 00:36:34,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 884. [2022-11-22 00:36:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 649 states have (on average 1.2742681047765794) internal successors, (827), 655 states have internal predecessors, (827), 152 states have call successors, (152), 82 states have call predecessors, (152), 82 states have return successors, (152), 146 states have call predecessors, (152), 152 states have call successors, (152) [2022-11-22 00:36:34,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1131 transitions. [2022-11-22 00:36:34,585 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1131 transitions. Word has length 85 [2022-11-22 00:36:34,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:36:34,585 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 1131 transitions. [2022-11-22 00:36:34,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 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) [2022-11-22 00:36:34,586 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1131 transitions. [2022-11-22 00:36:34,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 00:36:34,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:36:34,587 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, 1, 1, 1, 1, 1] [2022-11-22 00:36:34,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 00:36:34,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:36:34,793 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:36:34,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:36:34,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1802678683, now seen corresponding path program 1 times [2022-11-22 00:36:34,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:36:34,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343918325] [2022-11-22 00:36:34,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:36:34,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:36:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:36:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 00:36:35,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:36:35,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343918325] [2022-11-22 00:36:35,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343918325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:36:35,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535543418] [2022-11-22 00:36:35,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:36:35,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:36:35,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:36:35,123 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:36:35,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 00:36:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:36:35,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 00:36:35,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:36:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 00:36:35,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:36:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 00:36:35,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535543418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:36:35,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [810274639] [2022-11-22 00:36:35,526 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-22 00:36:35,526 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:36:35,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:36:35,526 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:36:35,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:36:38,853 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-22 00:36:38,875 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-22 00:36:38,892 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2022-11-22 00:36:38,970 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-11-22 00:36:39,013 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-22 00:36:39,062 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:37:21,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [810274639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:37:21,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:37:21,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [8, 9, 9] total 55 [2022-11-22 00:37:21,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809429999] [2022-11-22 00:37:21,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:37:21,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-22 00:37:21,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:37:21,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-22 00:37:21,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2722, Unknown=0, NotChecked=0, Total=2970 [2022-11-22 00:37:21,169 INFO L87 Difference]: Start difference. First operand 884 states and 1131 transitions. Second operand has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 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) [2022-11-22 00:37:31,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:37:31,857 INFO L93 Difference]: Finished difference Result 1479 states and 1926 transitions. [2022-11-22 00:37:31,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-22 00:37:31,858 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 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 87 [2022-11-22 00:37:31,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:37:31,860 INFO L225 Difference]: With dead ends: 1479 [2022-11-22 00:37:31,861 INFO L226 Difference]: Without dead ends: 919 [2022-11-22 00:37:31,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 203 SyntacticMatches, 14 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 43.8s TimeCoverageRelationStatistics Valid=265, Invalid=2927, Unknown=0, NotChecked=0, Total=3192 [2022-11-22 00:37:31,863 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 184 mSDsluCounter, 4705 mSDsCounter, 0 mSdLazyCounter, 3694 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 4999 SdHoareTripleChecker+Invalid, 3747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 3694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-22 00:37:31,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 4999 Invalid, 3747 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [53 Valid, 3694 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-11-22 00:37:31,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-11-22 00:37:32,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 887. [2022-11-22 00:37:32,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 651 states have (on average 1.273425499231951) internal successors, (829), 657 states have internal predecessors, (829), 153 states have call successors, (153), 82 states have call predecessors, (153), 82 states have return successors, (153), 147 states have call predecessors, (153), 153 states have call successors, (153) [2022-11-22 00:37:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1135 transitions. [2022-11-22 00:37:32,108 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1135 transitions. Word has length 87 [2022-11-22 00:37:32,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:37:32,108 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1135 transitions. [2022-11-22 00:37:32,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 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) [2022-11-22 00:37:32,108 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1135 transitions. [2022-11-22 00:37:32,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-22 00:37:32,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:37:32,110 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] [2022-11-22 00:37:32,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 00:37:32,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:37:32,316 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:37:32,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:37:32,316 INFO L85 PathProgramCache]: Analyzing trace with hash -761547315, now seen corresponding path program 1 times [2022-11-22 00:37:32,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:37:32,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591927402] [2022-11-22 00:37:32,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:37:32,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:37:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:37:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 00:37:32,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:37:32,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591927402] [2022-11-22 00:37:32,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591927402] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:37:32,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296999614] [2022-11-22 00:37:32,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:37:32,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:37:32,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:37:32,619 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:37:32,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 00:37:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:37:32,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 00:37:32,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:37:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:37:32,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:37:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 00:37:33,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296999614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:37:33,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1009794709] [2022-11-22 00:37:33,029 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-22 00:37:33,029 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:37:33,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:37:33,029 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:37:33,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:37:36,636 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-22 00:37:36,659 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-22 00:37:36,677 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-11-22 00:37:36,771 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 202 for LOIs [2022-11-22 00:37:37,169 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-22 00:37:37,215 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:38:23,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1009794709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:38:23,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:38:23,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 9, 9] total 56 [2022-11-22 00:38:23,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499897198] [2022-11-22 00:38:23,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:38:23,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-22 00:38:23,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:38:23,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-22 00:38:23,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2796, Unknown=0, NotChecked=0, Total=3080 [2022-11-22 00:38:23,912 INFO L87 Difference]: Start difference. First operand 887 states and 1135 transitions. Second operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 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) [2022-11-22 00:38:34,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:38:34,332 INFO L93 Difference]: Finished difference Result 1469 states and 1909 transitions. [2022-11-22 00:38:34,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-22 00:38:34,332 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 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 92 [2022-11-22 00:38:34,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:38:34,336 INFO L225 Difference]: With dead ends: 1469 [2022-11-22 00:38:34,336 INFO L226 Difference]: Without dead ends: 909 [2022-11-22 00:38:34,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 221 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 47.9s TimeCoverageRelationStatistics Valid=292, Invalid=2900, Unknown=0, NotChecked=0, Total=3192 [2022-11-22 00:38:34,339 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 175 mSDsluCounter, 3729 mSDsCounter, 0 mSdLazyCounter, 3488 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 3967 SdHoareTripleChecker+Invalid, 3540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 3488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:38:34,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 3967 Invalid, 3540 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [52 Valid, 3488 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-11-22 00:38:34,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-11-22 00:38:34,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 874. [2022-11-22 00:38:34,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 642 states have (on average 1.2710280373831775) internal successors, (816), 648 states have internal predecessors, (816), 149 states have call successors, (149), 82 states have call predecessors, (149), 82 states have return successors, (149), 143 states have call predecessors, (149), 149 states have call successors, (149) [2022-11-22 00:38:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1114 transitions. [2022-11-22 00:38:34,646 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1114 transitions. Word has length 92 [2022-11-22 00:38:34,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:38:34,646 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1114 transitions. [2022-11-22 00:38:34,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 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) [2022-11-22 00:38:34,647 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1114 transitions. [2022-11-22 00:38:34,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-22 00:38:34,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:38:34,648 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, 1, 1, 1, 1, 1] [2022-11-22 00:38:34,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-22 00:38:34,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:38:34,854 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:38:34,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:38:34,854 INFO L85 PathProgramCache]: Analyzing trace with hash -778050491, now seen corresponding path program 1 times [2022-11-22 00:38:34,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:38:34,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670600035] [2022-11-22 00:38:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:38:34,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:38:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:38:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-22 00:38:35,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:38:35,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670600035] [2022-11-22 00:38:35,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670600035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:38:35,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:38:35,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:38:35,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923886273] [2022-11-22 00:38:35,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:38:35,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:38:35,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:38:35,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:38:35,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:38:35,025 INFO L87 Difference]: Start difference. First operand 874 states and 1114 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, (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) [2022-11-22 00:38:35,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:38:35,348 INFO L93 Difference]: Finished difference Result 1487 states and 1919 transitions. [2022-11-22 00:38:35,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:38:35,348 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, (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 92 [2022-11-22 00:38:35,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:38:35,353 INFO L225 Difference]: With dead ends: 1487 [2022-11-22 00:38:35,353 INFO L226 Difference]: Without dead ends: 862 [2022-11-22 00:38:35,354 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 [2022-11-22 00:38:35,355 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 7 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:38:35,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 574 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:38:35,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-11-22 00:38:35,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2022-11-22 00:38:35,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 636 states have (on average 1.2452830188679245) internal successors, (792), 642 states have internal predecessors, (792), 143 states have call successors, (143), 82 states have call predecessors, (143), 82 states have return successors, (143), 137 states have call predecessors, (143), 143 states have call successors, (143) [2022-11-22 00:38:35,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1078 transitions. [2022-11-22 00:38:35,653 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1078 transitions. Word has length 92 [2022-11-22 00:38:35,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:38:35,654 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1078 transitions. [2022-11-22 00:38:35,654 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, (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) [2022-11-22 00:38:35,654 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1078 transitions. [2022-11-22 00:38:35,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-22 00:38:35,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:38:35,656 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, 1] [2022-11-22 00:38:35,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-22 00:38:35,656 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:38:35,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:38:35,656 INFO L85 PathProgramCache]: Analyzing trace with hash -370958719, now seen corresponding path program 1 times [2022-11-22 00:38:35,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:38:35,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895649690] [2022-11-22 00:38:35,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:38:35,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:38:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:38:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 00:38:35,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:38:35,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895649690] [2022-11-22 00:38:35,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895649690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:38:35,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739490733] [2022-11-22 00:38:35,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:38:35,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:38:35,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:38:35,976 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:38:35,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 00:38:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:38:36,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 00:38:36,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:38:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:38:36,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:38:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 00:38:36,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739490733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:38:36,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [962700106] [2022-11-22 00:38:36,381 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-22 00:38:36,381 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:38:36,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:38:36,382 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:38:36,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:38:39,669 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-22 00:38:39,693 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-22 00:38:39,712 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 198 for LOIs [2022-11-22 00:38:40,082 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 193 for LOIs [2022-11-22 00:38:40,452 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-22 00:38:40,496 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:39:29,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [962700106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:39:29,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:39:29,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 9, 9] total 56 [2022-11-22 00:39:29,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952479024] [2022-11-22 00:39:29,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:39:29,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-22 00:39:29,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:39:29,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-22 00:39:29,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2830, Unknown=0, NotChecked=0, Total=3080 [2022-11-22 00:39:29,372 INFO L87 Difference]: Start difference. First operand 862 states and 1078 transitions. Second operand has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 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) [2022-11-22 00:39:41,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:39:41,821 INFO L93 Difference]: Finished difference Result 1449 states and 1849 transitions. [2022-11-22 00:39:41,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-22 00:39:41,822 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 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 94 [2022-11-22 00:39:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:39:41,824 INFO L225 Difference]: With dead ends: 1449 [2022-11-22 00:39:41,824 INFO L226 Difference]: Without dead ends: 894 [2022-11-22 00:39:41,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 225 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 50.1s TimeCoverageRelationStatistics Valid=258, Invalid=2934, Unknown=0, NotChecked=0, Total=3192 [2022-11-22 00:39:41,826 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 153 mSDsluCounter, 4888 mSDsCounter, 0 mSdLazyCounter, 4151 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 5172 SdHoareTripleChecker+Invalid, 4188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 4151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-11-22 00:39:41,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 5172 Invalid, 4188 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [37 Valid, 4151 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2022-11-22 00:39:41,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-11-22 00:39:42,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 862. [2022-11-22 00:39:42,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 636 states have (on average 1.2437106918238994) internal successors, (791), 642 states have internal predecessors, (791), 143 states have call successors, (143), 82 states have call predecessors, (143), 82 states have return successors, (143), 137 states have call predecessors, (143), 143 states have call successors, (143) [2022-11-22 00:39:42,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1077 transitions. [2022-11-22 00:39:42,089 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1077 transitions. Word has length 94 [2022-11-22 00:39:42,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:39:42,090 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1077 transitions. [2022-11-22 00:39:42,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 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) [2022-11-22 00:39:42,090 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1077 transitions. [2022-11-22 00:39:42,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-22 00:39:42,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:39:42,092 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, 1, 1, 1, 1, 1] [2022-11-22 00:39:42,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 00:39:42,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-22 00:39:42,293 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:39:42,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:39:42,293 INFO L85 PathProgramCache]: Analyzing trace with hash 501826894, now seen corresponding path program 1 times [2022-11-22 00:39:42,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:39:42,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728957584] [2022-11-22 00:39:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:39:42,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:39:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:39:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 00:39:42,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:39:42,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728957584] [2022-11-22 00:39:42,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728957584] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:39:42,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176356475] [2022-11-22 00:39:42,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:39:42,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:39:42,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:39:42,614 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:39:42,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 00:39:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:39:42,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 00:39:42,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:39:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:39:42,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:39:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 00:39:43,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176356475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:39:43,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1071576162] [2022-11-22 00:39:43,031 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2022-11-22 00:39:43,032 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:39:43,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:39:43,032 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:39:43,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:39:47,019 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-22 00:39:47,053 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-22 00:39:47,070 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2022-11-22 00:39:47,154 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 203 for LOIs [2022-11-22 00:39:47,521 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-22 00:39:47,576 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:40:39,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1071576162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:40:39,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:40:39,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [8, 9, 9] total 58 [2022-11-22 00:40:39,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499522629] [2022-11-22 00:40:39,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:40:39,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-22 00:40:39,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:40:39,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-22 00:40:39,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=3024, Unknown=0, NotChecked=0, Total=3306 [2022-11-22 00:40:39,201 INFO L87 Difference]: Start difference. First operand 862 states and 1077 transitions. Second operand has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 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) [2022-11-22 00:40:51,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:40:51,202 INFO L93 Difference]: Finished difference Result 1436 states and 1827 transitions. [2022-11-22 00:40:51,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-22 00:40:51,203 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 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 98 [2022-11-22 00:40:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:40:51,207 INFO L225 Difference]: With dead ends: 1436 [2022-11-22 00:40:51,207 INFO L226 Difference]: Without dead ends: 884 [2022-11-22 00:40:51,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 230 SyntacticMatches, 17 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 53.3s TimeCoverageRelationStatistics Valid=299, Invalid=3241, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 00:40:51,209 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 259 mSDsluCounter, 4621 mSDsCounter, 0 mSdLazyCounter, 4021 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 4881 SdHoareTripleChecker+Invalid, 4101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 4021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:40:51,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 4881 Invalid, 4101 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [80 Valid, 4021 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2022-11-22 00:40:51,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-11-22 00:40:51,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 849. [2022-11-22 00:40:51,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 627 states have (on average 1.240829346092504) internal successors, (778), 633 states have internal predecessors, (778), 139 states have call successors, (139), 82 states have call predecessors, (139), 82 states have return successors, (139), 133 states have call predecessors, (139), 139 states have call successors, (139) [2022-11-22 00:40:51,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1056 transitions. [2022-11-22 00:40:51,448 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1056 transitions. Word has length 98 [2022-11-22 00:40:51,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:40:51,449 INFO L495 AbstractCegarLoop]: Abstraction has 849 states and 1056 transitions. [2022-11-22 00:40:51,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 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) [2022-11-22 00:40:51,449 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1056 transitions. [2022-11-22 00:40:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-22 00:40:51,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:40:51,450 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, 1, 1, 1, 1, 1] [2022-11-22 00:40:51,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-22 00:40:51,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-22 00:40:51,656 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:40:51,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:40:51,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1809514280, now seen corresponding path program 1 times [2022-11-22 00:40:51,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:40:51,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250925836] [2022-11-22 00:40:51,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:40:51,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:40:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:40:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-22 00:40:51,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:40:51,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250925836] [2022-11-22 00:40:51,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250925836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:40:51,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:40:51,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:40:51,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219348867] [2022-11-22 00:40:51,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:40:51,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:40:51,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:40:51,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:40:51,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:40:51,861 INFO L87 Difference]: Start difference. First operand 849 states and 1056 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 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) [2022-11-22 00:40:52,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:40:52,157 INFO L93 Difference]: Finished difference Result 1402 states and 1774 transitions. [2022-11-22 00:40:52,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:40:52,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 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 108 [2022-11-22 00:40:52,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:40:52,160 INFO L225 Difference]: With dead ends: 1402 [2022-11-22 00:40:52,160 INFO L226 Difference]: Without dead ends: 837 [2022-11-22 00:40:52,161 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 [2022-11-22 00:40:52,161 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 7 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:40:52,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 562 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:40:52,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-11-22 00:40:52,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 787. [2022-11-22 00:40:52,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 585 states have (on average 1.2068376068376068) internal successors, (706), 591 states have internal predecessors, (706), 125 states have call successors, (125), 76 states have call predecessors, (125), 76 states have return successors, (125), 119 states have call predecessors, (125), 125 states have call successors, (125) [2022-11-22 00:40:52,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 956 transitions. [2022-11-22 00:40:52,362 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 956 transitions. Word has length 108 [2022-11-22 00:40:52,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:40:52,363 INFO L495 AbstractCegarLoop]: Abstraction has 787 states and 956 transitions. [2022-11-22 00:40:52,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 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) [2022-11-22 00:40:52,363 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 956 transitions. [2022-11-22 00:40:52,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-22 00:40:52,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:40:52,364 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, 1, 1, 1, 1, 1] [2022-11-22 00:40:52,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-22 00:40:52,364 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:40:52,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:40:52,365 INFO L85 PathProgramCache]: Analyzing trace with hash -993728657, now seen corresponding path program 1 times [2022-11-22 00:40:52,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:40:52,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763119641] [2022-11-22 00:40:52,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:40:52,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:40:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:40:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-22 00:40:52,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:40:52,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763119641] [2022-11-22 00:40:52,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763119641] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:40:52,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:40:52,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:40:52,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141986746] [2022-11-22 00:40:52,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:40:52,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:40:52,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:40:52,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:40:52,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:40:52,540 INFO L87 Difference]: Start difference. First operand 787 states and 956 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 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) [2022-11-22 00:40:52,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:40:52,856 INFO L93 Difference]: Finished difference Result 1245 states and 1545 transitions. [2022-11-22 00:40:52,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:40:52,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 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 124 [2022-11-22 00:40:52,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:40:52,860 INFO L225 Difference]: With dead ends: 1245 [2022-11-22 00:40:52,860 INFO L226 Difference]: Without dead ends: 775 [2022-11-22 00:40:52,861 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 [2022-11-22 00:40:52,862 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 6 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:40:52,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 553 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:40:52,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-11-22 00:40:53,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 751. [2022-11-22 00:40:53,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 559 states have (on average 1.184257602862254) internal successors, (662), 565 states have internal predecessors, (662), 118 states have call successors, (118), 73 states have call predecessors, (118), 73 states have return successors, (118), 112 states have call predecessors, (118), 118 states have call successors, (118) [2022-11-22 00:40:53,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 898 transitions. [2022-11-22 00:40:53,054 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 898 transitions. Word has length 124 [2022-11-22 00:40:53,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:40:53,055 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 898 transitions. [2022-11-22 00:40:53,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 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) [2022-11-22 00:40:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 898 transitions. [2022-11-22 00:40:53,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-22 00:40:53,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:40:53,057 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, 1, 1, 1, 1, 1] [2022-11-22 00:40:53,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-22 00:40:53,058 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:40:53,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:40:53,058 INFO L85 PathProgramCache]: Analyzing trace with hash 711856186, now seen corresponding path program 1 times [2022-11-22 00:40:53,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:40:53,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803754373] [2022-11-22 00:40:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:40:53,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:40:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:40:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-22 00:40:53,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:40:53,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803754373] [2022-11-22 00:40:53,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803754373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:40:53,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700466341] [2022-11-22 00:40:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:40:53,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:40:53,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:40:53,423 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:40:53,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 00:40:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:40:53,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 00:40:53,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:40:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 69 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-22 00:40:53,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:40:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-22 00:40:53,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700466341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:40:53,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [449254625] [2022-11-22 00:40:53,842 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2022-11-22 00:40:53,842 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:40:53,843 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:40:53,843 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:40:53,843 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:41:01,308 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 91 for LOIs [2022-11-22 00:41:01,417 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-22 00:41:01,435 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-11-22 00:41:01,553 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 151 for LOIs [2022-11-22 00:41:01,611 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 195 for LOIs [2022-11-22 00:41:02,108 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 194 for LOIs [2022-11-22 00:41:02,566 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:42:05,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '69096#(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) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2p_old~0) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 0) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (<= (+ 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)))) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256)))) (= ~nomsg~0 ~cs2_new~0) (<= 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 [2022-11-22 00:42:05,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:42:05,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:42:05,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 13 [2022-11-22 00:42:05,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22037613] [2022-11-22 00:42:05,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:42:05,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 00:42:05,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:42:05,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 00:42:05,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=3961, Unknown=0, NotChecked=0, Total=4290 [2022-11-22 00:42:05,485 INFO L87 Difference]: Start difference. First operand 751 states and 898 transitions. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 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) [2022-11-22 00:42:06,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:42:06,748 INFO L93 Difference]: Finished difference Result 1983 states and 2516 transitions. [2022-11-22 00:42:06,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 00:42:06,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 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 134 [2022-11-22 00:42:06,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:42:06,755 INFO L225 Difference]: With dead ends: 1983 [2022-11-22 00:42:06,755 INFO L226 Difference]: Without dead ends: 1399 [2022-11-22 00:42:06,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 323 SyntacticMatches, 24 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 63.2s TimeCoverageRelationStatistics Valid=365, Invalid=4605, Unknown=0, NotChecked=0, Total=4970 [2022-11-22 00:42:06,758 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 485 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 1929 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:42:06,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 1929 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:42:06,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2022-11-22 00:42:07,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1054. [2022-11-22 00:42:07,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 781 states have (on average 1.17797695262484) internal successors, (920), 790 states have internal predecessors, (920), 166 states have call successors, (166), 106 states have call predecessors, (166), 106 states have return successors, (166), 157 states have call predecessors, (166), 166 states have call successors, (166) [2022-11-22 00:42:07,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1252 transitions. [2022-11-22 00:42:07,050 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1252 transitions. Word has length 134 [2022-11-22 00:42:07,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:42:07,051 INFO L495 AbstractCegarLoop]: Abstraction has 1054 states and 1252 transitions. [2022-11-22 00:42:07,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 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) [2022-11-22 00:42:07,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1252 transitions. [2022-11-22 00:42:07,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-22 00:42:07,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:42:07,054 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, 1, 1, 1, 1, 1] [2022-11-22 00:42:07,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-22 00:42:07,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:42:07,261 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:42:07,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:42:07,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1461184554, now seen corresponding path program 1 times [2022-11-22 00:42:07,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:42:07,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497178080] [2022-11-22 00:42:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:42:07,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:42:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:42:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-22 00:42:10,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:42:10,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497178080] [2022-11-22 00:42:10,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497178080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:42:10,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657534065] [2022-11-22 00:42:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:42:10,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:42:10,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:42:10,349 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:42:10,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 00:42:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:42:10,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 00:42:10,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:42:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 71 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-22 00:42:11,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:42:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-22 00:42:12,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657534065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:42:12,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1144266351] [2022-11-22 00:42:12,358 INFO L159 IcfgInterpreter]: Started Sifa with 89 locations of interest [2022-11-22 00:42:12,358 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:42:12,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:42:12,359 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:42:12,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:42:21,811 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 92 for LOIs [2022-11-22 00:42:21,981 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-22 00:42:22,007 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-11-22 00:42:22,140 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 152 for LOIs [2022-11-22 00:42:22,177 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 123 for LOIs [2022-11-22 00:42:22,300 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 197 for LOIs [2022-11-22 00:42:22,790 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:43:57,970 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '74011#(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) (= (mod ~side2Failed_History_1~0 256) 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 [2022-11-22 00:43:57,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:43:57,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:43:57,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 14, 14] total 55 [2022-11-22 00:43:57,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515227463] [2022-11-22 00:43:57,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:43:57,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-22 00:43:57,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:43:57,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-22 00:43:57,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=10192, Unknown=0, NotChecked=0, Total=12210 [2022-11-22 00:43:57,974 INFO L87 Difference]: Start difference. First operand 1054 states and 1252 transitions. Second operand has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 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) [2022-11-22 00:44:06,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:44:06,707 INFO L93 Difference]: Finished difference Result 2558 states and 3339 transitions. [2022-11-22 00:44:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-22 00:44:06,708 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 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 142 [2022-11-22 00:44:06,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:44:06,713 INFO L225 Difference]: With dead ends: 2558 [2022-11-22 00:44:06,713 INFO L226 Difference]: Without dead ends: 1713 [2022-11-22 00:44:06,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 330 SyntacticMatches, 23 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6281 ImplicationChecksByTransitivity, 99.4s TimeCoverageRelationStatistics Valid=2492, Invalid=16414, Unknown=0, NotChecked=0, Total=18906 [2022-11-22 00:44:06,718 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 1134 mSDsluCounter, 12440 mSDsCounter, 0 mSdLazyCounter, 5639 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1183 SdHoareTripleChecker+Valid, 12864 SdHoareTripleChecker+Invalid, 5954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 5639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:44:06,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1183 Valid, 12864 Invalid, 5954 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [315 Valid, 5639 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-22 00:44:06,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2022-11-22 00:44:07,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 981. [2022-11-22 00:44:07,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 732 states have (on average 1.1967213114754098) internal successors, (876), 743 states have internal predecessors, (876), 151 states have call successors, (151), 97 states have call predecessors, (151), 97 states have return successors, (151), 140 states have call predecessors, (151), 151 states have call successors, (151) [2022-11-22 00:44:07,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1178 transitions. [2022-11-22 00:44:07,199 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1178 transitions. Word has length 142 [2022-11-22 00:44:07,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:44:07,200 INFO L495 AbstractCegarLoop]: Abstraction has 981 states and 1178 transitions. [2022-11-22 00:44:07,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 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) [2022-11-22 00:44:07,201 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1178 transitions. [2022-11-22 00:44:07,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 00:44:07,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:44:07,203 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:44:07,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 00:44:07,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:44:07,411 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:44:07,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:44:07,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1374833708, now seen corresponding path program 1 times [2022-11-22 00:44:07,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:44:07,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258464010] [2022-11-22 00:44:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:44:07,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:44:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:44:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-22 00:44:08,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:44:08,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258464010] [2022-11-22 00:44:08,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258464010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:44:08,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684463926] [2022-11-22 00:44:08,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:44:08,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:44:08,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:44:08,616 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:44:08,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_186d66f0-b458-4de5-9bbd-d19193b07034/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 00:44:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:44:08,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-22 00:44:08,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:44:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 67 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-22 00:44:09,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:44:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-22 00:44:10,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684463926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:44:10,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [530456951] [2022-11-22 00:44:10,657 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2022-11-22 00:44:10,657 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:44:10,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:44:10,658 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:44:10,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:44:40,015 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 84 for LOIs [2022-11-22 00:44:40,104 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-11-22 00:44:40,111 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 116 for LOIs [2022-11-22 00:44:40,223 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 104 for LOIs [2022-11-22 00:44:40,336 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 119 for LOIs [2022-11-22 00:44:40,405 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 86 for LOIs [2022-11-22 00:44:40,429 INFO L180 IcfgInterpreter]: Interpretation finished