./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI --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 ac8e60fb32c268c01bf0cc1d1cd76454411c67e3ab15d16b4eca5e74b982e97f --- 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-5e519f3 [2022-11-03 01:45:45,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:45:45,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:45:45,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:45:45,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:45:45,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:45:45,103 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:45:45,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:45:45,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:45:45,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:45:45,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:45:45,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:45:45,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:45:45,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:45:45,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:45:45,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:45:45,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:45:45,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:45:45,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:45:45,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:45:45,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:45:45,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:45:45,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:45:45,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:45:45,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:45:45,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:45:45,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:45:45,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:45:45,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:45:45,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:45:45,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:45:45,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:45:45,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:45:45,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:45:45,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:45:45,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:45:45,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:45:45,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:45:45,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:45:45,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:45:45,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:45:45,152 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:45:45,188 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:45:45,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:45:45,193 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:45:45,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:45:45,194 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:45:45,194 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:45:45,195 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:45:45,195 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:45:45,195 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:45:45,195 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:45:45,196 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:45:45,197 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:45:45,197 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:45:45,197 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:45:45,197 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:45:45,198 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:45:45,198 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:45:45,198 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:45:45,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:45:45,199 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:45:45,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:45:45,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:45:45,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:45:45,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:45:45,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:45:45,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:45:45,201 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:45:45,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:45:45,203 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:45:45,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:45:45,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:45:45,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:45:45,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:45:45,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:45:45,204 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:45:45,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:45:45,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:45:45,205 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:45:45,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:45:45,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:45:45,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:45:45,206 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_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac8e60fb32c268c01bf0cc1d1cd76454411c67e3ab15d16b4eca5e74b982e97f [2022-11-03 01:45:45,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:45:45,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:45:45,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:45:45,530 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:45:45,531 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:45:45,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c [2022-11-03 01:45:45,603 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/data/6dff3cf64/4283c1a872654975ad9e424ff3ea3991/FLAGceac2de4b [2022-11-03 01:45:46,132 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:45:46,133 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c [2022-11-03 01:45:46,143 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/data/6dff3cf64/4283c1a872654975ad9e424ff3ea3991/FLAGceac2de4b [2022-11-03 01:45:46,478 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/data/6dff3cf64/4283c1a872654975ad9e424ff3ea3991 [2022-11-03 01:45:46,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:45:46,482 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:45:46,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:45:46,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:45:46,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:45:46,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:45:46" (1/1) ... [2022-11-03 01:45:46,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@635e1a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:46, skipping insertion in model container [2022-11-03 01:45:46,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:45:46" (1/1) ... [2022-11-03 01:45:46,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:45:46,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:45:46,889 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c[14522,14535] [2022-11-03 01:45:46,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:45:46,907 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:45:47,006 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c[14522,14535] [2022-11-03 01:45:47,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:45:47,036 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:45:47,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:47 WrapperNode [2022-11-03 01:45:47,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:45:47,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:45:47,037 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:45:47,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:45:47,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:47" (1/1) ... [2022-11-03 01:45:47,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:47" (1/1) ... [2022-11-03 01:45:47,115 INFO L138 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 530 [2022-11-03 01:45:47,115 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:45:47,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:45:47,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:45:47,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:45:47,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:47" (1/1) ... [2022-11-03 01:45:47,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:47" (1/1) ... [2022-11-03 01:45:47,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:47" (1/1) ... [2022-11-03 01:45:47,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:47" (1/1) ... [2022-11-03 01:45:47,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:47" (1/1) ... [2022-11-03 01:45:47,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:47" (1/1) ... [2022-11-03 01:45:47,175 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:47" (1/1) ... [2022-11-03 01:45:47,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:47" (1/1) ... [2022-11-03 01:45:47,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:45:47,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:45:47,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:45:47,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:45:47,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:47" (1/1) ... [2022-11-03 01:45:47,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:45:47,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:47,227 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:45:47,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:45:47,273 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2022-11-03 01:45:47,273 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2022-11-03 01:45:47,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:45:47,274 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2022-11-03 01:45:47,274 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2022-11-03 01:45:47,274 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-11-03 01:45:47,274 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-11-03 01:45:47,274 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2022-11-03 01:45:47,274 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2022-11-03 01:45:47,275 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 01:45:47,275 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 01:45:47,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:45:47,275 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2022-11-03 01:45:47,275 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2022-11-03 01:45:47,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:45:47,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:45:47,276 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2022-11-03 01:45:47,276 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2022-11-03 01:45:47,385 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:45:47,388 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:45:48,069 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:45:48,352 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:45:48,353 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:45:48,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:45:48 BoogieIcfgContainer [2022-11-03 01:45:48,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:45:48,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:45:48,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:45:48,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:45:48,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:45:46" (1/3) ... [2022-11-03 01:45:48,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b0695c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:45:48, skipping insertion in model container [2022-11-03 01:45:48,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:47" (2/3) ... [2022-11-03 01:45:48,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b0695c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:45:48, skipping insertion in model container [2022-11-03 01:45:48,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:45:48" (3/3) ... [2022-11-03 01:45:48,367 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.4_1.ufo.UNBOUNDED.pals.c [2022-11-03 01:45:48,386 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:45:48,386 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:45:48,457 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:45:48,464 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;@55467e3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:45:48,464 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:45:48,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 103 states have (on average 1.5339805825242718) internal successors, (158), 105 states have internal predecessors, (158), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-03 01:45:48,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 01:45:48,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:48,481 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:48,482 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:48,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:48,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1096086949, now seen corresponding path program 1 times [2022-11-03 01:45:48,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:48,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632863005] [2022-11-03 01:45:48,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:48,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:49,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:49,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632863005] [2022-11-03 01:45:49,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632863005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:49,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:49,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:45:49,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331974989] [2022-11-03 01:45:49,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:49,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:45:49,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:49,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:45:49,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:45:49,152 INFO L87 Difference]: Start difference. First operand has 143 states, 103 states have (on average 1.5339805825242718) internal successors, (158), 105 states have internal predecessors, (158), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:45:49,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:49,388 INFO L93 Difference]: Finished difference Result 286 states and 467 transitions. [2022-11-03 01:45:49,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:45:49,391 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 [2022-11-03 01:45:49,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:49,401 INFO L225 Difference]: With dead ends: 286 [2022-11-03 01:45:49,401 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 01:45:49,405 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 [2022-11-03 01:45:49,408 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 5 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:49,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 596 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:45:49,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 01:45:49,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-11-03 01:45:49,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 106 states have (on average 1.5) internal successors, (159), 107 states have internal predecessors, (159), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-03 01:45:49,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 221 transitions. [2022-11-03 01:45:49,470 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 221 transitions. Word has length 19 [2022-11-03 01:45:49,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:49,471 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 221 transitions. [2022-11-03 01:45:49,472 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) [2022-11-03 01:45:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 221 transitions. [2022-11-03 01:45:49,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 01:45:49,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:49,474 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:49,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:45:49,475 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:49,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:49,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1499476303, now seen corresponding path program 1 times [2022-11-03 01:45:49,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:49,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163782349] [2022-11-03 01:45:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:49,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:45:49,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:49,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163782349] [2022-11-03 01:45:49,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163782349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:49,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:49,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:45:49,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565815940] [2022-11-03 01:45:49,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:49,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:45:49,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:49,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:45:49,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:45:49,785 INFO L87 Difference]: Start difference. First operand 146 states and 221 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:45:49,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:49,906 INFO L93 Difference]: Finished difference Result 294 states and 445 transitions. [2022-11-03 01:45:49,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:45:49,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-03 01:45:49,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:49,912 INFO L225 Difference]: With dead ends: 294 [2022-11-03 01:45:49,912 INFO L226 Difference]: Without dead ends: 151 [2022-11-03 01:45:49,916 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 [2022-11-03 01:45:49,918 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 6 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 608 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 [2022-11-03 01:45:49,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 608 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:45:49,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-03 01:45:49,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-11-03 01:45:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 110 states have (on average 1.481818181818182) internal successors, (163), 111 states have internal predecessors, (163), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-03 01:45:49,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 225 transitions. [2022-11-03 01:45:49,952 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 225 transitions. Word has length 28 [2022-11-03 01:45:49,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:49,953 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 225 transitions. [2022-11-03 01:45:49,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:45:49,955 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 225 transitions. [2022-11-03 01:45:49,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 01:45:49,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:49,957 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:49,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:45:49,958 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:49,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:49,964 INFO L85 PathProgramCache]: Analyzing trace with hash 716949658, now seen corresponding path program 1 times [2022-11-03 01:45:49,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:49,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386469571] [2022-11-03 01:45:49,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:49,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:45:50,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:50,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386469571] [2022-11-03 01:45:50,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386469571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:50,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:50,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:45:50,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215254020] [2022-11-03 01:45:50,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:50,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:45:50,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:50,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:45:50,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:45:50,218 INFO L87 Difference]: Start difference. First operand 151 states and 225 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:45:50,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:50,320 INFO L93 Difference]: Finished difference Result 304 states and 456 transitions. [2022-11-03 01:45:50,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:45:50,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2022-11-03 01:45:50,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:50,323 INFO L225 Difference]: With dead ends: 304 [2022-11-03 01:45:50,323 INFO L226 Difference]: Without dead ends: 156 [2022-11-03 01:45:50,324 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 [2022-11-03 01:45:50,325 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 6 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:50,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 594 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:45:50,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-03 01:45:50,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-11-03 01:45:50,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 114 states have (on average 1.4649122807017543) internal successors, (167), 115 states have internal predecessors, (167), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-03 01:45:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 229 transitions. [2022-11-03 01:45:50,338 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 229 transitions. Word has length 36 [2022-11-03 01:45:50,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:50,339 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 229 transitions. [2022-11-03 01:45:50,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:45:50,339 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 229 transitions. [2022-11-03 01:45:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 01:45:50,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:50,341 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:50,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:45:50,341 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:50,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:50,342 INFO L85 PathProgramCache]: Analyzing trace with hash 195496806, now seen corresponding path program 1 times [2022-11-03 01:45:50,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:50,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111430143] [2022-11-03 01:45:50,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:50,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:45:50,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:50,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111430143] [2022-11-03 01:45:50,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111430143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:50,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:50,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:45:50,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511795738] [2022-11-03 01:45:50,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:50,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:45:50,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:50,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:45:50,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:45:50,538 INFO L87 Difference]: Start difference. First operand 156 states and 229 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 01:45:50,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:50,625 INFO L93 Difference]: Finished difference Result 314 states and 464 transitions. [2022-11-03 01:45:50,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:45:50,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2022-11-03 01:45:50,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:50,631 INFO L225 Difference]: With dead ends: 314 [2022-11-03 01:45:50,631 INFO L226 Difference]: Without dead ends: 161 [2022-11-03 01:45:50,632 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 [2022-11-03 01:45:50,641 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 6 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:50,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 594 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:45:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-03 01:45:50,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-11-03 01:45:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 118 states have (on average 1.4491525423728813) internal successors, (171), 119 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-03 01:45:50,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 233 transitions. [2022-11-03 01:45:50,663 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 233 transitions. Word has length 44 [2022-11-03 01:45:50,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:50,663 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 233 transitions. [2022-11-03 01:45:50,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 01:45:50,665 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 233 transitions. [2022-11-03 01:45:50,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 01:45:50,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:50,672 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:50,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:45:50,672 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:50,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:50,673 INFO L85 PathProgramCache]: Analyzing trace with hash 2094004799, now seen corresponding path program 1 times [2022-11-03 01:45:50,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:50,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715036535] [2022-11-03 01:45:50,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:50,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:45:50,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:50,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715036535] [2022-11-03 01:45:50,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715036535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:50,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:50,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:45:50,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632438147] [2022-11-03 01:45:50,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:50,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:45:50,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:50,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:45:50,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:45:50,890 INFO L87 Difference]: Start difference. First operand 161 states and 233 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 01:45:50,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:50,978 INFO L93 Difference]: Finished difference Result 323 states and 468 transitions. [2022-11-03 01:45:50,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:45:50,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2022-11-03 01:45:50,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:50,988 INFO L225 Difference]: With dead ends: 323 [2022-11-03 01:45:50,988 INFO L226 Difference]: Without dead ends: 165 [2022-11-03 01:45:50,989 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 [2022-11-03 01:45:50,990 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 5 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:50,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 603 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:45:50,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-03 01:45:51,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-11-03 01:45:51,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 121 states have (on average 1.43801652892562) internal successors, (174), 122 states have internal predecessors, (174), 31 states have call successors, (31), 12 states have call predecessors, (31), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-03 01:45:51,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 236 transitions. [2022-11-03 01:45:51,014 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 236 transitions. Word has length 44 [2022-11-03 01:45:51,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:51,015 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 236 transitions. [2022-11-03 01:45:51,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 01:45:51,016 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 236 transitions. [2022-11-03 01:45:51,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 01:45:51,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:51,021 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:51,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:45:51,022 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:51,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:51,022 INFO L85 PathProgramCache]: Analyzing trace with hash -961918010, now seen corresponding path program 1 times [2022-11-03 01:45:51,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:51,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538206905] [2022-11-03 01:45:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:51,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:45:51,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:51,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538206905] [2022-11-03 01:45:51,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538206905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:51,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:51,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:45:51,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009752976] [2022-11-03 01:45:51,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:51,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:45:51,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:51,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:45:51,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:45:51,260 INFO L87 Difference]: Start difference. First operand 165 states and 236 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 01:45:51,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:51,329 INFO L93 Difference]: Finished difference Result 333 states and 477 transitions. [2022-11-03 01:45:51,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:45:51,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 52 [2022-11-03 01:45:51,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:51,331 INFO L225 Difference]: With dead ends: 333 [2022-11-03 01:45:51,332 INFO L226 Difference]: Without dead ends: 171 [2022-11-03 01:45:51,332 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 [2022-11-03 01:45:51,333 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 7 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:51,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 605 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:45:51,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-03 01:45:51,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-11-03 01:45:51,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 126 states have (on average 1.4206349206349207) internal successors, (179), 127 states have internal predecessors, (179), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-03 01:45:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 241 transitions. [2022-11-03 01:45:51,348 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 241 transitions. Word has length 52 [2022-11-03 01:45:51,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:51,348 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 241 transitions. [2022-11-03 01:45:51,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 01:45:51,349 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 241 transitions. [2022-11-03 01:45:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 01:45:51,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:51,351 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:51,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:45:51,352 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:51,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:51,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1418508239, now seen corresponding path program 1 times [2022-11-03 01:45:51,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:51,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349341702] [2022-11-03 01:45:51,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:51,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:45:51,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:51,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349341702] [2022-11-03 01:45:51,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349341702] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:51,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437925929] [2022-11-03 01:45:51,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:51,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:51,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:51,869 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:51,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:45:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:52,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:45:52,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:45:52,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:45:52,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437925929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:52,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:45:52,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-11-03 01:45:52,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588921007] [2022-11-03 01:45:52,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:52,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:45:52,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:52,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:45:52,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:45:52,356 INFO L87 Difference]: Start difference. First operand 171 states and 241 transitions. Second operand has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 01:45:52,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:52,728 INFO L93 Difference]: Finished difference Result 507 states and 707 transitions. [2022-11-03 01:45:52,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:45:52,729 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 55 [2022-11-03 01:45:52,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:52,731 INFO L225 Difference]: With dead ends: 507 [2022-11-03 01:45:52,732 INFO L226 Difference]: Without dead ends: 329 [2022-11-03 01:45:52,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:45:52,733 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 203 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:52,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 1198 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:45:52,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-03 01:45:52,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 326. [2022-11-03 01:45:52,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 239 states have (on average 1.4100418410041842) internal successors, (337), 241 states have internal predecessors, (337), 60 states have call successors, (60), 26 states have call predecessors, (60), 26 states have return successors, (60), 59 states have call predecessors, (60), 60 states have call successors, (60) [2022-11-03 01:45:52,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 457 transitions. [2022-11-03 01:45:52,759 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 457 transitions. Word has length 55 [2022-11-03 01:45:52,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:52,761 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 457 transitions. [2022-11-03 01:45:52,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 01:45:52,761 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 457 transitions. [2022-11-03 01:45:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 01:45:52,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:52,763 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:52,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:52,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:52,985 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:52,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:52,986 INFO L85 PathProgramCache]: Analyzing trace with hash 115361592, now seen corresponding path program 1 times [2022-11-03 01:45:52,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:52,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329827777] [2022-11-03 01:45:52,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:52,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:45:53,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:53,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329827777] [2022-11-03 01:45:53,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329827777] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:53,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145998416] [2022-11-03 01:45:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:53,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:53,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:53,397 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:53,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:45:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:53,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:45:53,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:53,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:45:54,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145998416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:54,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2010893500] [2022-11-03 01:45:54,174 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-03 01:45:54,174 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:45:54,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:45:54,184 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:45:54,185 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:46:01,525 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 153 for LOIs [2022-11-03 01:46:02,025 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 01:46:02,037 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 01:46:02,086 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:46:20,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2010893500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:20,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:46:20,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [9, 9, 9] total 35 [2022-11-03 01:46:20,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104169761] [2022-11-03 01:46:20,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:20,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 01:46:20,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:46:20,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 01:46:20,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 01:46:20,524 INFO L87 Difference]: Start difference. First operand 326 states and 457 transitions. Second operand has 24 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 01:46:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:25,702 INFO L93 Difference]: Finished difference Result 758 states and 1080 transitions. [2022-11-03 01:46:25,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 01:46:25,703 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 57 [2022-11-03 01:46:25,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:25,707 INFO L225 Difference]: With dead ends: 758 [2022-11-03 01:46:25,708 INFO L226 Difference]: Without dead ends: 435 [2022-11-03 01:46:25,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 01:46:25,710 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 102 mSDsluCounter, 3166 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 3450 SdHoareTripleChecker+Invalid, 1981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:25,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 3450 Invalid, 1981 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13 Valid, 1637 Invalid, 0 Unknown, 331 Unchecked, 3.9s Time] [2022-11-03 01:46:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-03 01:46:25,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 392. [2022-11-03 01:46:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 287 states have (on average 1.3902439024390243) internal successors, (399), 288 states have internal predecessors, (399), 75 states have call successors, (75), 29 states have call predecessors, (75), 29 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2022-11-03 01:46:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 549 transitions. [2022-11-03 01:46:25,789 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 549 transitions. Word has length 57 [2022-11-03 01:46:25,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:25,790 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 549 transitions. [2022-11-03 01:46:25,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 01:46:25,790 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 549 transitions. [2022-11-03 01:46:25,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 01:46:25,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:25,792 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:25,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:26,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:46:26,005 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:26,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:26,006 INFO L85 PathProgramCache]: Analyzing trace with hash -273014020, now seen corresponding path program 1 times [2022-11-03 01:46:26,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:46:26,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190714256] [2022-11-03 01:46:26,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:26,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:46:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:46:26,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:46:26,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190714256] [2022-11-03 01:46:26,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190714256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:46:26,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218606152] [2022-11-03 01:46:26,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:26,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:46:26,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:46:26,360 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:46:26,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:46:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:26,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:46:26,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:26,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:46:26,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218606152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:26,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1821974737] [2022-11-03 01:46:26,870 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-03 01:46:26,870 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:46:26,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:46:26,871 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:46:26,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:46:29,321 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 111 for LOIs [2022-11-03 01:46:29,430 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 01:46:29,439 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 01:46:29,484 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:46:43,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1821974737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:43,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:46:43,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [9, 9, 9] total 35 [2022-11-03 01:46:43,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035641862] [2022-11-03 01:46:43,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:43,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 01:46:43,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:46:43,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 01:46:43,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 01:46:43,339 INFO L87 Difference]: Start difference. First operand 392 states and 549 transitions. Second operand has 24 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 01:46:50,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:50,030 INFO L93 Difference]: Finished difference Result 802 states and 1131 transitions. [2022-11-03 01:46:50,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 01:46:50,031 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 57 [2022-11-03 01:46:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:50,036 INFO L225 Difference]: With dead ends: 802 [2022-11-03 01:46:50,037 INFO L226 Difference]: Without dead ends: 479 [2022-11-03 01:46:50,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 01:46:50,041 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 134 mSDsluCounter, 2210 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 2468 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:50,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 2468 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-03 01:46:50,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-03 01:46:50,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 456. [2022-11-03 01:46:50,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 332 states have (on average 1.3734939759036144) internal successors, (456), 333 states have internal predecessors, (456), 90 states have call successors, (90), 33 states have call predecessors, (90), 33 states have return successors, (90), 89 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 01:46:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 636 transitions. [2022-11-03 01:46:50,118 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 636 transitions. Word has length 57 [2022-11-03 01:46:50,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:50,118 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 636 transitions. [2022-11-03 01:46:50,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 01:46:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 636 transitions. [2022-11-03 01:46:50,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-03 01:46:50,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:50,120 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:50,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:50,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 01:46:50,333 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:50,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:50,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1533508645, now seen corresponding path program 1 times [2022-11-03 01:46:50,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:46:50,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436330105] [2022-11-03 01:46:50,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:50,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:46:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:46:50,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:46:50,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436330105] [2022-11-03 01:46:50,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436330105] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:46:50,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336960724] [2022-11-03 01:46:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:50,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:46:50,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:46:50,693 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:46:50,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:46:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:50,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:46:50,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:51,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:46:51,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336960724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:51,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1229157740] [2022-11-03 01:46:51,252 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-03 01:46:51,252 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:46:51,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:46:51,253 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:46:51,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:47:09,064 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 185 for LOIs [2022-11-03 01:47:12,118 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 01:47:12,128 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 103 for LOIs [2022-11-03 01:47:12,161 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:47:31,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1229157740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:31,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:47:31,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [9, 9, 9] total 37 [2022-11-03 01:47:31,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56564939] [2022-11-03 01:47:31,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:31,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 01:47:31,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:47:31,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 01:47:31,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1202, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 01:47:31,161 INFO L87 Difference]: Start difference. First operand 456 states and 636 transitions. Second operand has 26 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 18 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 01:47:41,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:41,474 INFO L93 Difference]: Finished difference Result 864 states and 1219 transitions. [2022-11-03 01:47:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 01:47:41,475 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 18 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-11-03 01:47:41,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:41,478 INFO L225 Difference]: With dead ends: 864 [2022-11-03 01:47:41,478 INFO L226 Difference]: Without dead ends: 541 [2022-11-03 01:47:41,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 146 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=159, Invalid=1481, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 01:47:41,480 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 141 mSDsluCounter, 4089 mSDsCounter, 0 mSdLazyCounter, 2506 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 4374 SdHoareTripleChecker+Invalid, 2561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:41,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 4374 Invalid, 2561 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [55 Valid, 2506 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-03 01:47:41,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-11-03 01:47:41,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 492. [2022-11-03 01:47:41,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 358 states have (on average 1.3575418994413408) internal successors, (486), 359 states have internal predecessors, (486), 97 states have call successors, (97), 36 states have call predecessors, (97), 36 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-03 01:47:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 680 transitions. [2022-11-03 01:47:41,588 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 680 transitions. Word has length 59 [2022-11-03 01:47:41,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:41,588 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 680 transitions. [2022-11-03 01:47:41,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 18 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 01:47:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 680 transitions. [2022-11-03 01:47:41,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 01:47:41,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:41,590 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:41,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:41,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:41,817 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:41,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:41,818 INFO L85 PathProgramCache]: Analyzing trace with hash 741854266, now seen corresponding path program 1 times [2022-11-03 01:47:41,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:47:41,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817044639] [2022-11-03 01:47:41,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:41,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:47:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:47:41,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:47:41,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817044639] [2022-11-03 01:47:41,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817044639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:41,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:41,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:47:41,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424484767] [2022-11-03 01:47:41,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:41,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:47:41,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:47:41,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:47:41,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:47:41,968 INFO L87 Difference]: Start difference. First operand 492 states and 680 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 01:47:42,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:42,123 INFO L93 Difference]: Finished difference Result 891 states and 1253 transitions. [2022-11-03 01:47:42,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:47:42,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 61 [2022-11-03 01:47:42,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:42,127 INFO L225 Difference]: With dead ends: 891 [2022-11-03 01:47:42,127 INFO L226 Difference]: Without dead ends: 500 [2022-11-03 01:47:42,132 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 [2022-11-03 01:47:42,133 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 5 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:42,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 603 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:47:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-11-03 01:47:42,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2022-11-03 01:47:42,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 364 states have (on average 1.3516483516483517) internal successors, (492), 365 states have internal predecessors, (492), 97 states have call successors, (97), 38 states have call predecessors, (97), 38 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-03 01:47:42,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 686 transitions. [2022-11-03 01:47:42,242 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 686 transitions. Word has length 61 [2022-11-03 01:47:42,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:42,242 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 686 transitions. [2022-11-03 01:47:42,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 01:47:42,242 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 686 transitions. [2022-11-03 01:47:42,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 01:47:42,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:42,244 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:42,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 01:47:42,244 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:42,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:42,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1425670552, now seen corresponding path program 1 times [2022-11-03 01:47:42,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:47:42,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353961824] [2022-11-03 01:47:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:42,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:47:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:47:42,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:47:42,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353961824] [2022-11-03 01:47:42,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353961824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:47:42,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083680452] [2022-11-03 01:47:42,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:42,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:42,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:42,568 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:42,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:47:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:42,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:47:42,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:42,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:47:43,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083680452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:43,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1889929760] [2022-11-03 01:47:43,106 INFO L159 IcfgInterpreter]: Started Sifa with 55 locations of interest [2022-11-03 01:47:43,106 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:47:43,106 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:47:43,106 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:47:43,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:47:50,584 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 73 for LOIs [2022-11-03 01:47:50,600 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 01:47:50,609 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 103 for LOIs [2022-11-03 01:47:50,641 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 111 for LOIs [2022-11-03 01:47:50,683 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 115 for LOIs [2022-11-03 01:47:50,724 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 01:47:50,758 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:48:31,508 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13513#(and (<= ~active_side_History_0~0 0) (<= 0 (+ ~manual_selection_History_0~0 128)) (<= ~s1p~0 0) (<= ~cs2~0 0) (<= 0 |#NULL.base|) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (<= 0 (+ ~s2s2_new~0 1)) (<= ~s2s1~0 0) (<= ~s2s2~0 0) (<= 0 (+ ~s2s1_new~0 1)) (<= (+ ~s1p_new~0 1) 0) (<= 0 ~s1s1~0) (<= 0 ~cs2~0) (<= 1 ~side1_written~0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (<= 0 (+ ~s2p_new~0 1)) (= |assert_#in~arg| 0) (<= ~s1s2~0 0) (<= 0 ~s2p~0) (<= ~s2p~0 0) (<= 0 ~cs1~0) (<= 0 ~s1p~0) (<= 0 (+ ~s1s2_new~0 1)) (<= |#NULL.offset| 0) (<= (+ ~side2_written~0 1) 0) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (not (= (mod ~side1Failed_History_1~0 256) 0)) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (<= (+ ~s2s1_new~0 1) 0) (<= 0 ~manual_selection_History_2~0) (= (mod ~side2Failed_History_1~0 256) 0) (<= ~cs1~0 0) (<= 0 ~s2s2~0) (<= (+ ~nomsg~0 1) 0) (<= 0 (+ ~side2_written~0 1)) (<= |#NULL.base| 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ 2 ~active_side_History_1~0) 0) (<= (+ ~cs1_new~0 1) 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= ~manual_selection_History_2~0 0) (<= 0 ~s1s2~0) (<= ~s1s1~0 0) (<= 0 ~s2s1~0) (<= 0 |#NULL.offset|) (<= ~side1_written~0 1) (<= 0 (+ ~cs2_new~0 1)) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (<= (+ ~s2s2_new~0 1) 0) (<= (+ ~s1s1_new~0 1) 0))' at error location [2022-11-03 01:48:31,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:48:31,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:48:31,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-03 01:48:31,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719537507] [2022-11-03 01:48:31,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:48:31,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:48:31,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:31,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:48:31,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2602, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 01:48:31,511 INFO L87 Difference]: Start difference. First operand 500 states and 686 transitions. Second operand has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-03 01:48:32,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:32,276 INFO L93 Difference]: Finished difference Result 1217 states and 1695 transitions. [2022-11-03 01:48:32,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:48:32,277 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 65 [2022-11-03 01:48:32,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:32,283 INFO L225 Difference]: With dead ends: 1217 [2022-11-03 01:48:32,283 INFO L226 Difference]: Without dead ends: 834 [2022-11-03 01:48:32,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 142 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=286, Invalid=3136, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 01:48:32,286 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 294 mSDsluCounter, 2559 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 2772 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:32,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 2772 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:48:32,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-11-03 01:48:32,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 528. [2022-11-03 01:48:32,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 385 states have (on average 1.316883116883117) internal successors, (507), 388 states have internal predecessors, (507), 95 states have call successors, (95), 47 states have call predecessors, (95), 47 states have return successors, (95), 92 states have call predecessors, (95), 95 states have call successors, (95) [2022-11-03 01:48:32,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 697 transitions. [2022-11-03 01:48:32,404 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 697 transitions. Word has length 65 [2022-11-03 01:48:32,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:32,406 INFO L495 AbstractCegarLoop]: Abstraction has 528 states and 697 transitions. [2022-11-03 01:48:32,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-03 01:48:32,406 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 697 transitions. [2022-11-03 01:48:32,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 01:48:32,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:32,414 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] [2022-11-03 01:48:32,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:32,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:32,629 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:32,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:32,629 INFO L85 PathProgramCache]: Analyzing trace with hash 408931345, now seen corresponding path program 1 times [2022-11-03 01:48:32,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:32,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295180387] [2022-11-03 01:48:32,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:32,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:48:32,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:32,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295180387] [2022-11-03 01:48:32,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295180387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:32,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:32,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:48:32,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77079497] [2022-11-03 01:48:32,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:32,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:48:32,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:32,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:48:32,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:48:32,937 INFO L87 Difference]: Start difference. First operand 528 states and 697 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:48:33,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:33,804 INFO L93 Difference]: Finished difference Result 1162 states and 1606 transitions. [2022-11-03 01:48:33,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:48:33,805 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 66 [2022-11-03 01:48:33,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:33,809 INFO L225 Difference]: With dead ends: 1162 [2022-11-03 01:48:33,809 INFO L226 Difference]: Without dead ends: 857 [2022-11-03 01:48:33,810 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 [2022-11-03 01:48:33,811 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 645 mSDsluCounter, 1512 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1964 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:33,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 1964 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:48:33,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-11-03 01:48:33,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 656. [2022-11-03 01:48:33,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 476 states have (on average 1.3130252100840336) internal successors, (625), 479 states have internal predecessors, (625), 119 states have call successors, (119), 60 states have call predecessors, (119), 60 states have return successors, (119), 116 states have call predecessors, (119), 119 states have call successors, (119) [2022-11-03 01:48:33,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 863 transitions. [2022-11-03 01:48:33,938 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 863 transitions. Word has length 66 [2022-11-03 01:48:33,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:33,939 INFO L495 AbstractCegarLoop]: Abstraction has 656 states and 863 transitions. [2022-11-03 01:48:33,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:48:33,939 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 863 transitions. [2022-11-03 01:48:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 01:48:33,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:33,940 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:33,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 01:48:33,941 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:33,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:33,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1993945974, now seen corresponding path program 1 times [2022-11-03 01:48:33,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:33,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337663884] [2022-11-03 01:48:33,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:33,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:48:34,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:34,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337663884] [2022-11-03 01:48:34,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337663884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:34,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:34,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:48:34,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798959762] [2022-11-03 01:48:34,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:34,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:48:34,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:34,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:48:34,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:48:34,183 INFO L87 Difference]: Start difference. First operand 656 states and 863 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 01:48:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:35,097 INFO L93 Difference]: Finished difference Result 1519 states and 2096 transitions. [2022-11-03 01:48:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:48:35,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 68 [2022-11-03 01:48:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:35,104 INFO L225 Difference]: With dead ends: 1519 [2022-11-03 01:48:35,104 INFO L226 Difference]: Without dead ends: 1190 [2022-11-03 01:48:35,105 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 [2022-11-03 01:48:35,106 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 591 mSDsluCounter, 1402 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:35,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 1661 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:48:35,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2022-11-03 01:48:35,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 917. [2022-11-03 01:48:35,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 662 states have (on average 1.3217522658610272) internal successors, (875), 667 states have internal predecessors, (875), 169 states have call successors, (169), 85 states have call predecessors, (169), 85 states have return successors, (169), 164 states have call predecessors, (169), 169 states have call successors, (169) [2022-11-03 01:48:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1213 transitions. [2022-11-03 01:48:35,291 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1213 transitions. Word has length 68 [2022-11-03 01:48:35,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:35,291 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1213 transitions. [2022-11-03 01:48:35,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 01:48:35,292 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1213 transitions. [2022-11-03 01:48:35,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 01:48:35,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:35,293 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:35,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 01:48:35,293 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:35,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:35,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1303647062, now seen corresponding path program 1 times [2022-11-03 01:48:35,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:35,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834015610] [2022-11-03 01:48:35,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:35,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:48:35,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:35,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834015610] [2022-11-03 01:48:35,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834015610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:35,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619721259] [2022-11-03 01:48:35,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:35,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:35,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:35,601 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:35,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:48:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:35,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:48:35,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:48:35,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:48:36,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619721259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:36,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [474379929] [2022-11-03 01:48:36,023 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2022-11-03 01:48:36,023 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:48:36,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:48:36,023 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:48:36,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:48:40,907 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 153 for LOIs [2022-11-03 01:48:41,278 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 01:48:41,289 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 104 for LOIs [2022-11-03 01:48:41,384 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 01:48:41,415 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:49:10,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [474379929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:10,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:49:10,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [9, 9, 9] total 50 [2022-11-03 01:49:10,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018622953] [2022-11-03 01:49:10,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:10,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 01:49:10,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:10,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 01:49:10,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2225, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 01:49:10,644 INFO L87 Difference]: Start difference. First operand 917 states and 1213 transitions. Second operand has 36 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 24 states have internal predecessors, (43), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-03 01:49:18,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:18,897 INFO L93 Difference]: Finished difference Result 1537 states and 2061 transitions. [2022-11-03 01:49:18,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-03 01:49:18,898 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 24 states have internal predecessors, (43), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 72 [2022-11-03 01:49:18,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:18,903 INFO L225 Difference]: With dead ends: 1537 [2022-11-03 01:49:18,903 INFO L226 Difference]: Without dead ends: 956 [2022-11-03 01:49:18,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 167 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=244, Invalid=2408, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 01:49:18,906 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 268 mSDsluCounter, 3004 mSDsCounter, 0 mSdLazyCounter, 2361 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 3219 SdHoareTripleChecker+Invalid, 2787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 349 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:18,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 3219 Invalid, 2787 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [77 Valid, 2361 Invalid, 0 Unknown, 349 Unchecked, 6.1s Time] [2022-11-03 01:49:18,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-11-03 01:49:19,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 920. [2022-11-03 01:49:19,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 664 states have (on average 1.3207831325301205) internal successors, (877), 669 states have internal predecessors, (877), 170 states have call successors, (170), 85 states have call predecessors, (170), 85 states have return successors, (170), 165 states have call predecessors, (170), 170 states have call successors, (170) [2022-11-03 01:49:19,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1217 transitions. [2022-11-03 01:49:19,118 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1217 transitions. Word has length 72 [2022-11-03 01:49:19,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:19,118 INFO L495 AbstractCegarLoop]: Abstraction has 920 states and 1217 transitions. [2022-11-03 01:49:19,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 24 states have internal predecessors, (43), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-03 01:49:19,119 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1217 transitions. [2022-11-03 01:49:19,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 01:49:19,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:19,121 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:19,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:19,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 01:49:19,333 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:19,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:19,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1489932390, now seen corresponding path program 1 times [2022-11-03 01:49:19,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:19,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510356133] [2022-11-03 01:49:19,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:19,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:49:19,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:19,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510356133] [2022-11-03 01:49:19,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510356133] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:19,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221980232] [2022-11-03 01:49:19,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:19,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:19,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:19,660 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:19,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:49:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:19,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:49:19,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:49:19,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:49:20,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221980232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:20,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [629647009] [2022-11-03 01:49:20,093 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2022-11-03 01:49:20,094 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:49:20,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:49:20,094 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:49:20,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:49:23,052 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 111 for LOIs [2022-11-03 01:49:23,140 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 01:49:23,148 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 104 for LOIs [2022-11-03 01:49:23,240 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 01:49:23,271 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:49:50,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [629647009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:50,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:49:50,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [9, 9, 9] total 50 [2022-11-03 01:49:50,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015030155] [2022-11-03 01:49:50,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:50,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 01:49:50,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:50,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 01:49:50,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2225, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 01:49:50,105 INFO L87 Difference]: Start difference. First operand 920 states and 1217 transitions. Second operand has 36 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 24 states have internal predecessors, (43), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-03 01:50:08,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:08,330 INFO L93 Difference]: Finished difference Result 1487 states and 1984 transitions. [2022-11-03 01:50:08,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-03 01:50:08,331 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 24 states have internal predecessors, (43), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 72 [2022-11-03 01:50:08,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:08,336 INFO L225 Difference]: With dead ends: 1487 [2022-11-03 01:50:08,336 INFO L226 Difference]: Without dead ends: 906 [2022-11-03 01:50:08,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 167 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=388, Invalid=3394, Unknown=0, NotChecked=0, Total=3782 [2022-11-03 01:50:08,339 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 136 mSDsluCounter, 2971 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 3208 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:08,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 3208 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-03 01:50:08,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2022-11-03 01:50:08,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 906. [2022-11-03 01:50:08,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 654 states have (on average 1.319571865443425) internal successors, (863), 659 states have internal predecessors, (863), 167 states have call successors, (167), 84 states have call predecessors, (167), 84 states have return successors, (167), 162 states have call predecessors, (167), 167 states have call successors, (167) [2022-11-03 01:50:08,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1197 transitions. [2022-11-03 01:50:08,550 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1197 transitions. Word has length 72 [2022-11-03 01:50:08,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:08,550 INFO L495 AbstractCegarLoop]: Abstraction has 906 states and 1197 transitions. [2022-11-03 01:50:08,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 24 states have internal predecessors, (43), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-03 01:50:08,551 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1197 transitions. [2022-11-03 01:50:08,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 01:50:08,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:08,552 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] [2022-11-03 01:50:08,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:08,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 01:50:08,767 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:08,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:08,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1409327133, now seen corresponding path program 1 times [2022-11-03 01:50:08,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:08,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452352450] [2022-11-03 01:50:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:08,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:50:09,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:09,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452352450] [2022-11-03 01:50:09,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452352450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:50:09,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671300023] [2022-11-03 01:50:09,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:09,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:09,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:09,140 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:09,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:50:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:09,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:50:09,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:50:09,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:50:09,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671300023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:09,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [978899255] [2022-11-03 01:50:09,608 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2022-11-03 01:50:09,608 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:50:09,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:50:09,608 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:50:09,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:50:29,590 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 204 for LOIs [2022-11-03 01:50:33,246 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 01:50:33,257 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 113 for LOIs [2022-11-03 01:50:33,569 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 103 for LOIs [2022-11-03 01:50:33,601 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:51:09,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [978899255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:09,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:51:09,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [9, 9, 9] total 52 [2022-11-03 01:51:09,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43088644] [2022-11-03 01:51:09,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:09,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 01:51:09,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:09,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 01:51:09,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2422, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 01:51:09,834 INFO L87 Difference]: Start difference. First operand 906 states and 1197 transitions. Second operand has 38 states, 32 states have (on average 1.40625) internal successors, (45), 26 states have internal predecessors, (45), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-03 01:51:32,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:32,377 INFO L93 Difference]: Finished difference Result 1526 states and 2045 transitions. [2022-11-03 01:51:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-03 01:51:32,378 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 32 states have (on average 1.40625) internal successors, (45), 26 states have internal predecessors, (45), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 74 [2022-11-03 01:51:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:32,383 INFO L225 Difference]: With dead ends: 1526 [2022-11-03 01:51:32,383 INFO L226 Difference]: Without dead ends: 945 [2022-11-03 01:51:32,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 174 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 50.1s TimeCoverageRelationStatistics Valid=389, Invalid=3643, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 01:51:32,386 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 218 mSDsluCounter, 4911 mSDsCounter, 0 mSdLazyCounter, 3611 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 5205 SdHoareTripleChecker+Invalid, 3720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 3611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:32,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 5205 Invalid, 3720 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [109 Valid, 3611 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-11-03 01:51:32,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-11-03 01:51:32,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 909. [2022-11-03 01:51:32,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 656 states have (on average 1.3185975609756098) internal successors, (865), 661 states have internal predecessors, (865), 168 states have call successors, (168), 84 states have call predecessors, (168), 84 states have return successors, (168), 163 states have call predecessors, (168), 168 states have call successors, (168) [2022-11-03 01:51:32,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1201 transitions. [2022-11-03 01:51:32,580 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1201 transitions. Word has length 74 [2022-11-03 01:51:32,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:32,580 INFO L495 AbstractCegarLoop]: Abstraction has 909 states and 1201 transitions. [2022-11-03 01:51:32,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 32 states have (on average 1.40625) internal successors, (45), 26 states have internal predecessors, (45), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-03 01:51:32,581 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1201 transitions. [2022-11-03 01:51:32,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:51:32,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:32,583 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:32,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:32,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 01:51:32,797 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:32,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:32,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1548693316, now seen corresponding path program 1 times [2022-11-03 01:51:32,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:32,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721456671] [2022-11-03 01:51:32,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:32,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:51:33,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:51:33,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721456671] [2022-11-03 01:51:33,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721456671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:33,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:33,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:51:33,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100942752] [2022-11-03 01:51:33,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:33,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:51:33,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:33,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:51:33,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:51:33,032 INFO L87 Difference]: Start difference. First operand 909 states and 1201 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 01:51:33,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:33,402 INFO L93 Difference]: Finished difference Result 1196 states and 1653 transitions. [2022-11-03 01:51:33,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:51:33,403 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 75 [2022-11-03 01:51:33,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:33,408 INFO L225 Difference]: With dead ends: 1196 [2022-11-03 01:51:33,409 INFO L226 Difference]: Without dead ends: 1194 [2022-11-03 01:51:33,410 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 [2022-11-03 01:51:33,410 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 151 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:33,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 1452 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:51:33,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-11-03 01:51:33,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 917. [2022-11-03 01:51:33,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 660 states have (on average 1.3166666666666667) internal successors, (869), 667 states have internal predecessors, (869), 170 states have call successors, (170), 86 states have call predecessors, (170), 86 states have return successors, (170), 163 states have call predecessors, (170), 170 states have call successors, (170) [2022-11-03 01:51:33,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1209 transitions. [2022-11-03 01:51:33,653 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1209 transitions. Word has length 75 [2022-11-03 01:51:33,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:33,653 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1209 transitions. [2022-11-03 01:51:33,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 01:51:33,654 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1209 transitions. [2022-11-03 01:51:33,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-03 01:51:33,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:33,656 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:33,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 01:51:33,656 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:33,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:33,656 INFO L85 PathProgramCache]: Analyzing trace with hash -928815303, now seen corresponding path program 1 times [2022-11-03 01:51:33,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:33,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584432760] [2022-11-03 01:51:33,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:33,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:51:34,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:51:34,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584432760] [2022-11-03 01:51:34,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584432760] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:51:34,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148479516] [2022-11-03 01:51:34,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:34,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:34,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:34,006 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:34,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:51:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:34,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:51:34,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:51:34,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:51:34,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148479516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:34,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1319968729] [2022-11-03 01:51:34,476 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2022-11-03 01:51:34,476 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:51:34,476 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:51:34,476 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:51:34,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:51:40,137 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 153 for LOIs [2022-11-03 01:51:40,711 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 01:51:40,719 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 104 for LOIs [2022-11-03 01:51:40,833 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 01:51:40,873 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:15,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1319968729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:15,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:52:15,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [9, 9, 9] total 56 [2022-11-03 01:52:15,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274700937] [2022-11-03 01:52:15,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:15,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 01:52:15,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:15,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 01:52:15,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2741, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 01:52:15,443 INFO L87 Difference]: Start difference. First operand 917 states and 1209 transitions. Second operand has 38 states, 32 states have (on average 1.34375) internal successors, (43), 25 states have internal predecessors, (43), 9 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 01:52:22,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:22,039 INFO L93 Difference]: Finished difference Result 1516 states and 2022 transitions. [2022-11-03 01:52:22,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 01:52:22,040 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 32 states have (on average 1.34375) internal successors, (43), 25 states have internal predecessors, (43), 9 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 78 [2022-11-03 01:52:22,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:22,043 INFO L225 Difference]: With dead ends: 1516 [2022-11-03 01:52:22,043 INFO L226 Difference]: Without dead ends: 956 [2022-11-03 01:52:22,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 178 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=362, Invalid=2944, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 01:52:22,045 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 214 mSDsluCounter, 3066 mSDsCounter, 0 mSdLazyCounter, 1896 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 3301 SdHoareTripleChecker+Invalid, 2362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 389 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:22,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 3301 Invalid, 2362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1896 Invalid, 0 Unknown, 389 Unchecked, 4.4s Time] [2022-11-03 01:52:22,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-11-03 01:52:22,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 920. [2022-11-03 01:52:22,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 662 states have (on average 1.3157099697885197) internal successors, (871), 669 states have internal predecessors, (871), 171 states have call successors, (171), 86 states have call predecessors, (171), 86 states have return successors, (171), 164 states have call predecessors, (171), 171 states have call successors, (171) [2022-11-03 01:52:22,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1213 transitions. [2022-11-03 01:52:22,248 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1213 transitions. Word has length 78 [2022-11-03 01:52:22,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:22,249 INFO L495 AbstractCegarLoop]: Abstraction has 920 states and 1213 transitions. [2022-11-03 01:52:22,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 32 states have (on average 1.34375) internal successors, (43), 25 states have internal predecessors, (43), 9 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 01:52:22,249 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1213 transitions. [2022-11-03 01:52:22,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-03 01:52:22,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:22,251 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:22,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:22,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:22,464 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:22,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:22,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1987268085, now seen corresponding path program 1 times [2022-11-03 01:52:22,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:22,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364458391] [2022-11-03 01:52:22,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:22,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:52:22,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:22,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364458391] [2022-11-03 01:52:22,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364458391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:22,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773993281] [2022-11-03 01:52:22,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:22,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:22,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:22,781 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:22,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:52:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:22,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:52:22,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:52:23,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:52:23,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773993281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:23,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1613001151] [2022-11-03 01:52:23,240 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2022-11-03 01:52:23,241 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:52:23,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:52:23,241 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:52:23,241 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:52:26,098 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 111 for LOIs [2022-11-03 01:52:26,209 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 01:52:26,218 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 104 for LOIs [2022-11-03 01:52:26,320 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 01:52:26,358 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:56,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1613001151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:56,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:52:56,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [9, 9, 9] total 56 [2022-11-03 01:52:56,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392230296] [2022-11-03 01:52:56,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:56,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 01:52:56,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:56,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 01:52:56,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=2739, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 01:52:56,693 INFO L87 Difference]: Start difference. First operand 920 states and 1213 transitions. Second operand has 38 states, 32 states have (on average 1.34375) internal successors, (43), 25 states have internal predecessors, (43), 9 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 01:53:16,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:16,435 INFO L93 Difference]: Finished difference Result 1482 states and 1968 transitions. [2022-11-03 01:53:16,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 01:53:16,436 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 32 states have (on average 1.34375) internal successors, (43), 25 states have internal predecessors, (43), 9 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 78 [2022-11-03 01:53:16,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:16,440 INFO L225 Difference]: With dead ends: 1482 [2022-11-03 01:53:16,440 INFO L226 Difference]: Without dead ends: 922 [2022-11-03 01:53:16,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 178 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=578, Invalid=4252, Unknown=0, NotChecked=0, Total=4830 [2022-11-03 01:53:16,443 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 247 mSDsluCounter, 2723 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 2959 SdHoareTripleChecker+Invalid, 2007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:16,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 2959 Invalid, 2007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-03 01:53:16,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-11-03 01:53:16,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 920. [2022-11-03 01:53:16,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 662 states have (on average 1.3141993957703928) internal successors, (870), 669 states have internal predecessors, (870), 171 states have call successors, (171), 86 states have call predecessors, (171), 86 states have return successors, (171), 164 states have call predecessors, (171), 171 states have call successors, (171) [2022-11-03 01:53:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1212 transitions. [2022-11-03 01:53:16,672 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1212 transitions. Word has length 78 [2022-11-03 01:53:16,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:16,673 INFO L495 AbstractCegarLoop]: Abstraction has 920 states and 1212 transitions. [2022-11-03 01:53:16,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 32 states have (on average 1.34375) internal successors, (43), 25 states have internal predecessors, (43), 9 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 01:53:16,673 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1212 transitions. [2022-11-03 01:53:16,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:53:16,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:16,676 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] [2022-11-03 01:53:16,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:16,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:16,889 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:16,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:16,889 INFO L85 PathProgramCache]: Analyzing trace with hash 305297516, now seen corresponding path program 1 times [2022-11-03 01:53:16,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:16,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445150338] [2022-11-03 01:53:16,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:16,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:53:17,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:17,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445150338] [2022-11-03 01:53:17,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445150338] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:53:17,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696075119] [2022-11-03 01:53:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:17,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:17,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:17,226 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:17,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:53:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:17,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:53:17,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:53:17,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:53:17,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696075119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:17,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1966981162] [2022-11-03 01:53:17,709 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2022-11-03 01:53:17,709 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:53:17,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:53:17,709 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:53:17,709 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:53:39,676 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 185 for LOIs [2022-11-03 01:53:43,700 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 01:53:43,711 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 103 for LOIs [2022-11-03 01:53:43,808 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 103 for LOIs [2022-11-03 01:53:43,851 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:54:24,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1966981162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:24,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:54:24,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [9, 9, 9] total 58 [2022-11-03 01:54:24,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827885564] [2022-11-03 01:54:24,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:24,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 01:54:24,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:24,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 01:54:24,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=2959, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 01:54:24,098 INFO L87 Difference]: Start difference. First operand 920 states and 1212 transitions. Second operand has 40 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 27 states have internal predecessors, (45), 9 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 01:54:50,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:50,318 INFO L93 Difference]: Finished difference Result 1519 states and 2025 transitions. [2022-11-03 01:54:50,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-03 01:54:50,318 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 27 states have internal predecessors, (45), 9 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 80 [2022-11-03 01:54:50,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:50,323 INFO L225 Difference]: With dead ends: 1519 [2022-11-03 01:54:50,323 INFO L226 Difference]: Without dead ends: 959 [2022-11-03 01:54:50,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 182 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 56.7s TimeCoverageRelationStatistics Valid=591, Invalid=4665, Unknown=0, NotChecked=0, Total=5256 [2022-11-03 01:54:50,326 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 266 mSDsluCounter, 5788 mSDsCounter, 0 mSdLazyCounter, 4247 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 6096 SdHoareTripleChecker+Invalid, 4375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 4247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:50,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 6096 Invalid, 4375 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [128 Valid, 4247 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-11-03 01:54:50,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-11-03 01:54:50,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 923. [2022-11-03 01:54:50,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 664 states have (on average 1.3132530120481927) internal successors, (872), 671 states have internal predecessors, (872), 172 states have call successors, (172), 86 states have call predecessors, (172), 86 states have return successors, (172), 165 states have call predecessors, (172), 172 states have call successors, (172) [2022-11-03 01:54:50,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1216 transitions. [2022-11-03 01:54:50,479 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1216 transitions. Word has length 80 [2022-11-03 01:54:50,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:50,479 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1216 transitions. [2022-11-03 01:54:50,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 27 states have internal predecessors, (45), 9 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 01:54:50,480 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1216 transitions. [2022-11-03 01:54:50,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:54:50,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:50,481 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:50,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:50,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:50,690 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:50,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:50,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1566911578, now seen corresponding path program 1 times [2022-11-03 01:54:50,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:50,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432920984] [2022-11-03 01:54:50,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:50,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:54:50,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:50,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432920984] [2022-11-03 01:54:50,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432920984] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:54:50,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697612990] [2022-11-03 01:54:50,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:50,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:50,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:50,973 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:50,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 01:54:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:51,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:54:51,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:54:51,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:51,456 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 01:54:51,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697612990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:51,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [11337213] [2022-11-03 01:54:51,457 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2022-11-03 01:54:51,458 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:54:51,458 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:54:51,458 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:54:51,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:54:56,396 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 153 for LOIs [2022-11-03 01:54:56,747 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 01:54:56,755 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 104 for LOIs [2022-11-03 01:54:56,847 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 110 for LOIs [2022-11-03 01:54:56,879 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 01:54:56,911 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:55:31,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [11337213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:31,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:55:31,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [9, 9, 9] total 60 [2022-11-03 01:55:31,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138632396] [2022-11-03 01:55:31,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:31,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 01:55:31,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:55:31,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 01:55:31,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=3240, Unknown=0, NotChecked=0, Total=3540 [2022-11-03 01:55:31,636 INFO L87 Difference]: Start difference. First operand 923 states and 1216 transitions. Second operand has 42 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 28 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-03 01:55:40,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:40,013 INFO L93 Difference]: Finished difference Result 1595 states and 2134 transitions. [2022-11-03 01:55:40,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-03 01:55:40,014 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 28 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 80 [2022-11-03 01:55:40,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:40,018 INFO L225 Difference]: With dead ends: 1595 [2022-11-03 01:55:40,018 INFO L226 Difference]: Without dead ends: 1004 [2022-11-03 01:55:40,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 181 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 36.8s TimeCoverageRelationStatistics Valid=320, Invalid=3462, Unknown=0, NotChecked=0, Total=3782 [2022-11-03 01:55:40,021 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 247 mSDsluCounter, 3703 mSDsCounter, 0 mSdLazyCounter, 2696 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 3926 SdHoareTripleChecker+Invalid, 3312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 555 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:40,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 3926 Invalid, 3312 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [61 Valid, 2696 Invalid, 0 Unknown, 555 Unchecked, 6.2s Time] [2022-11-03 01:55:40,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-11-03 01:55:40,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 955. [2022-11-03 01:55:40,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 685 states have (on average 1.3124087591240876) internal successors, (899), 693 states have internal predecessors, (899), 182 states have call successors, (182), 87 states have call predecessors, (182), 87 states have return successors, (182), 174 states have call predecessors, (182), 182 states have call successors, (182) [2022-11-03 01:55:40,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1263 transitions. [2022-11-03 01:55:40,292 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1263 transitions. Word has length 80 [2022-11-03 01:55:40,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:40,293 INFO L495 AbstractCegarLoop]: Abstraction has 955 states and 1263 transitions. [2022-11-03 01:55:40,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 28 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-03 01:55:40,293 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1263 transitions. [2022-11-03 01:55:40,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:55:40,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:40,295 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:40,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:40,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-03 01:55:40,512 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:40,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:40,512 INFO L85 PathProgramCache]: Analyzing trace with hash -788641808, now seen corresponding path program 1 times [2022-11-03 01:55:40,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:55:40,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372743119] [2022-11-03 01:55:40,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:40,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:55:40,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:55:40,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:55:40,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372743119] [2022-11-03 01:55:40,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372743119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:55:40,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027878766] [2022-11-03 01:55:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:40,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:40,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:40,834 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:40,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 01:55:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:40,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:55:40,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:55:41,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:41,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027878766] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:41,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:55:41,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-03 01:55:41,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781037311] [2022-11-03 01:55:41,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:41,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:55:41,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:55:41,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:55:41,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:55:41,132 INFO L87 Difference]: Start difference. First operand 955 states and 1263 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:55:41,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:41,933 INFO L93 Difference]: Finished difference Result 1766 states and 2386 transitions. [2022-11-03 01:55:41,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:55:41,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 80 [2022-11-03 01:55:41,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:41,940 INFO L225 Difference]: With dead ends: 1766 [2022-11-03 01:55:41,940 INFO L226 Difference]: Without dead ends: 1087 [2022-11-03 01:55:41,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:55:41,942 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 526 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:41,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 1447 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:55:41,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2022-11-03 01:55:42,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 914. [2022-11-03 01:55:42,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 658 states have (on average 1.3100303951367782) internal successors, (862), 665 states have internal predecessors, (862), 169 states have call successors, (169), 86 states have call predecessors, (169), 86 states have return successors, (169), 162 states have call predecessors, (169), 169 states have call successors, (169) [2022-11-03 01:55:42,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1200 transitions. [2022-11-03 01:55:42,151 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1200 transitions. Word has length 80 [2022-11-03 01:55:42,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:42,151 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1200 transitions. [2022-11-03 01:55:42,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:55:42,152 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1200 transitions. [2022-11-03 01:55:42,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:55:42,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:42,153 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:42,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:42,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-03 01:55:42,356 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:42,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:42,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1248817068, now seen corresponding path program 1 times [2022-11-03 01:55:42,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:55:42,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568239474] [2022-11-03 01:55:42,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:42,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:55:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:55:42,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:55:42,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568239474] [2022-11-03 01:55:42,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568239474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:55:42,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341506771] [2022-11-03 01:55:42,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:42,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:42,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:42,641 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:42,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 01:55:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:42,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:55:42,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 01:55:43,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:55:43,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341506771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:43,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [974403892] [2022-11-03 01:55:43,280 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2022-11-03 01:55:43,280 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:55:43,280 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:55:43,280 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:55:43,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:55:46,761 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 73 for LOIs [2022-11-03 01:55:46,776 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 01:55:46,785 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 104 for LOIs [2022-11-03 01:55:46,880 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 115 for LOIs [2022-11-03 01:55:46,923 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 111 for LOIs [2022-11-03 01:55:46,965 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 01:55:47,017 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:56:29,709 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '54827#(and (<= ~active_side_History_0~0 0) (<= 0 (+ ~manual_selection_History_0~0 128)) (<= ~s1p~0 0) (<= ~cs2~0 0) (<= 0 |#NULL.base|) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (<= 0 (+ ~s2s2_new~0 1)) (<= ~s2s1~0 0) (<= ~s2s2~0 0) (<= 0 (+ ~s2s1_new~0 1)) (<= (+ ~s1p_new~0 1) 0) (<= 0 ~s1s1~0) (<= 0 ~cs2~0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (<= 0 (+ ~s2p_new~0 1)) (= |assert_#in~arg| 0) (<= 0 ~side2_written~0) (<= ~s1s2~0 0) (<= 0 ~s2p~0) (<= ~s2p~0 0) (<= 0 ~cs1~0) (<= 0 ~s1p~0) (<= 0 (+ ~s1s2_new~0 1)) (<= |#NULL.offset| 0) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (not (= (mod ~side1Failed_History_0~0 256) 0)) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (<= (+ ~s2s1_new~0 1) 0) (<= 0 ~manual_selection_History_2~0) (<= ~cs1~0 0) (<= 0 ~s2s2~0) (not (= (mod ~side2Failed_History_1~0 256) 0)) (<= (+ ~nomsg~0 1) 0) (<= |#NULL.base| 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ 2 ~active_side_History_1~0) 0) (<= (+ ~cs1_new~0 1) 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= ~manual_selection_History_2~0 0) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= 0 ~s1s2~0) (<= ~s1s1~0 0) (<= 0 ~s2s1~0) (<= 0 |#NULL.offset|) (<= 0 (+ ~cs2_new~0 1)) (<= (+ ~side1_written~0 1) 0) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (<= (+ ~s2s2_new~0 1) 0) (= (mod ~side1Failed_History_1~0 256) 0) (<= (+ ~s1s1_new~0 1) 0))' at error location [2022-11-03 01:56:29,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:56:29,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:56:29,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-03 01:56:29,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158416230] [2022-11-03 01:56:29,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:29,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:56:29,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:29,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:56:29,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=3213, Unknown=0, NotChecked=0, Total=3540 [2022-11-03 01:56:29,712 INFO L87 Difference]: Start difference. First operand 914 states and 1200 transitions. Second operand has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-03 01:56:30,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:30,502 INFO L93 Difference]: Finished difference Result 1910 states and 2575 transitions. [2022-11-03 01:56:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:56:30,503 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 80 [2022-11-03 01:56:30,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:30,507 INFO L225 Difference]: With dead ends: 1910 [2022-11-03 01:56:30,507 INFO L226 Difference]: Without dead ends: 1159 [2022-11-03 01:56:30,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 12 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 42.9s TimeCoverageRelationStatistics Valid=353, Invalid=3807, Unknown=0, NotChecked=0, Total=4160 [2022-11-03 01:56:30,508 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 281 mSDsluCounter, 2003 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 2158 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:30,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 2158 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:56:30,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-11-03 01:56:30,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 893. [2022-11-03 01:56:30,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 643 states have (on average 1.3032659409020217) internal successors, (838), 650 states have internal predecessors, (838), 163 states have call successors, (163), 86 states have call predecessors, (163), 86 states have return successors, (163), 156 states have call predecessors, (163), 163 states have call successors, (163) [2022-11-03 01:56:30,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1164 transitions. [2022-11-03 01:56:30,673 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1164 transitions. Word has length 80 [2022-11-03 01:56:30,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:30,674 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1164 transitions. [2022-11-03 01:56:30,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-03 01:56:30,674 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1164 transitions. [2022-11-03 01:56:30,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-03 01:56:30,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:30,676 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:30,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:30,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:30,889 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:30,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:30,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2138356941, now seen corresponding path program 1 times [2022-11-03 01:56:30,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:30,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364260482] [2022-11-03 01:56:30,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:30,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:56:31,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:31,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364260482] [2022-11-03 01:56:31,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364260482] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:31,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593672604] [2022-11-03 01:56:31,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:31,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:31,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:31,189 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:31,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 01:56:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:31,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:56:31,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:56:31,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 01:56:31,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593672604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:31,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [59390205] [2022-11-03 01:56:31,690 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-11-03 01:56:31,690 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:31,690 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:56:31,691 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:56:31,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:56:51,178 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 205 for LOIs [2022-11-03 01:56:54,996 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 01:56:55,006 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 103 for LOIs [2022-11-03 01:56:55,124 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 111 for LOIs [2022-11-03 01:56:55,157 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 103 for LOIs [2022-11-03 01:56:55,187 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:57:41,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [59390205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:41,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:57:41,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [9, 9, 9] total 62 [2022-11-03 01:57:41,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369760387] [2022-11-03 01:57:41,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:41,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 01:57:41,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:41,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 01:57:41,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=3469, Unknown=0, NotChecked=0, Total=3782 [2022-11-03 01:57:41,659 INFO L87 Difference]: Start difference. First operand 893 states and 1164 transitions. Second operand has 44 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 30 states have internal predecessors, (47), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-03 01:58:10,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:10,037 INFO L93 Difference]: Finished difference Result 1508 states and 1996 transitions. [2022-11-03 01:58:10,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-03 01:58:10,037 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 30 states have internal predecessors, (47), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 82 [2022-11-03 01:58:10,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:10,042 INFO L225 Difference]: With dead ends: 1508 [2022-11-03 01:58:10,042 INFO L226 Difference]: Without dead ends: 928 [2022-11-03 01:58:10,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 185 SyntacticMatches, 8 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1508 ImplicationChecksByTransitivity, 66.2s TimeCoverageRelationStatistics Valid=556, Invalid=5450, Unknown=0, NotChecked=0, Total=6006 [2022-11-03 01:58:10,045 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 330 mSDsluCounter, 4911 mSDsCounter, 0 mSdLazyCounter, 3700 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 5184 SdHoareTripleChecker+Invalid, 3863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 3700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:10,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 5184 Invalid, 3863 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [163 Valid, 3700 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-11-03 01:58:10,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-11-03 01:58:10,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 896. [2022-11-03 01:58:10,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 645 states have (on average 1.302325581395349) internal successors, (840), 652 states have internal predecessors, (840), 164 states have call successors, (164), 86 states have call predecessors, (164), 86 states have return successors, (164), 157 states have call predecessors, (164), 164 states have call successors, (164) [2022-11-03 01:58:10,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1168 transitions. [2022-11-03 01:58:10,260 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1168 transitions. Word has length 82 [2022-11-03 01:58:10,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:10,261 INFO L495 AbstractCegarLoop]: Abstraction has 896 states and 1168 transitions. [2022-11-03 01:58:10,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 30 states have internal predecessors, (47), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-03 01:58:10,262 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1168 transitions. [2022-11-03 01:58:10,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 01:58:10,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:10,264 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, 1, 1, 1] [2022-11-03 01:58:10,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:10,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:10,477 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:10,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:10,478 INFO L85 PathProgramCache]: Analyzing trace with hash 64627433, now seen corresponding path program 1 times [2022-11-03 01:58:10,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:10,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37986955] [2022-11-03 01:58:10,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:10,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:58:10,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:10,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37986955] [2022-11-03 01:58:10,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37986955] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:10,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933220728] [2022-11-03 01:58:10,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:10,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:10,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:10,773 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:10,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a787afc1-4198-4f42-b5be-f88f6997a96c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 01:58:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:10,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:58:10,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:58:11,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:58:11,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933220728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:11,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [749264741] [2022-11-03 01:58:11,255 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2022-11-03 01:58:11,255 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:58:11,255 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:58:11,255 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:58:11,256 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:58:16,550 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 153 for LOIs [2022-11-03 01:58:17,019 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 01:58:17,031 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 104 for LOIs [2022-11-03 01:58:17,142 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 110 for LOIs [2022-11-03 01:58:17,174 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 01:58:17,218 INFO L180 IcfgInterpreter]: Interpretation finished