./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.BOUNDED-10.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_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/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_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/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_25ee63ee-2358-4952-a802-baaae2231aca/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 b1fa78b32466948213cdbfc05d3adcde2ac2fc14323ec3ac2f4b441976452676 --- 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 02:43:33,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:43:33,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:43:33,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:43:33,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:43:33,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:43:33,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:43:33,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:43:33,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:43:33,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:43:33,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:43:33,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:43:33,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:43:33,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:43:33,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:43:33,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:43:33,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:43:33,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:43:33,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:43:33,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:43:33,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:43:33,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:43:33,824 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:43:33,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:43:33,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:43:33,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:43:33,829 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:43:33,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:43:33,831 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:43:33,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:43:33,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:43:33,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:43:33,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:43:33,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:43:33,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:43:33,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:43:33,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:43:33,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:43:33,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:43:33,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:43:33,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:43:33,841 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:43:33,864 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:43:33,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:43:33,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:43:33,865 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:43:33,866 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:43:33,866 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:43:33,866 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:43:33,866 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:43:33,867 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:43:33,867 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:43:33,867 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:43:33,867 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:43:33,868 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:43:33,868 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:43:33,868 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:43:33,869 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:43:33,869 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:43:33,869 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:43:33,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:43:33,870 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:43:33,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:43:33,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:43:33,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:43:33,871 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:43:33,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:43:33,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:43:33,872 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:43:33,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:43:33,873 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:43:33,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:43:33,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:43:33,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:43:33,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:43:33,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:43:33,874 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:43:33,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:43:33,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:43:33,875 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:43:33,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:43:33,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:43:33,876 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:43:33,876 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_25ee63ee-2358-4952-a802-baaae2231aca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1fa78b32466948213cdbfc05d3adcde2ac2fc14323ec3ac2f4b441976452676 [2022-11-03 02:43:34,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:43:34,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:43:34,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:43:34,157 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:43:34,159 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:43:34,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.BOUNDED-10.pals.c [2022-11-03 02:43:34,266 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/data/0ecb70af7/2974da68ec7441a0b03aa36924d4147a/FLAGe7c645e38 [2022-11-03 02:43:34,845 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:43:34,846 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.BOUNDED-10.pals.c [2022-11-03 02:43:34,860 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/data/0ecb70af7/2974da68ec7441a0b03aa36924d4147a/FLAGe7c645e38 [2022-11-03 02:43:35,188 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/data/0ecb70af7/2974da68ec7441a0b03aa36924d4147a [2022-11-03 02:43:35,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:43:35,193 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:43:35,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:43:35,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:43:35,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:43:35,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:35,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b3445cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35, skipping insertion in model container [2022-11-03 02:43:35,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:35,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:43:35,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:43:35,581 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_25ee63ee-2358-4952-a802-baaae2231aca/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.BOUNDED-10.pals.c[14595,14608] [2022-11-03 02:43:35,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:43:35,593 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:43:35,654 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_25ee63ee-2358-4952-a802-baaae2231aca/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.BOUNDED-10.pals.c[14595,14608] [2022-11-03 02:43:35,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:43:35,670 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:43:35,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35 WrapperNode [2022-11-03 02:43:35,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:43:35,673 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:43:35,673 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:43:35,673 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:43:35,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:35,696 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:35,733 INFO L138 Inliner]: procedures = 32, calls = 47, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 539 [2022-11-03 02:43:35,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:43:35,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:43:35,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:43:35,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:43:35,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:35,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:35,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:35,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:35,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:35,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:35,787 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:35,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:35,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:43:35,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:43:35,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:43:35,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:43:35,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (1/1) ... [2022-11-03 02:43:35,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:43:35,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:35,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:43:35,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:43:35,911 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2022-11-03 02:43:35,911 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2022-11-03 02:43:35,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:43:35,911 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2022-11-03 02:43:35,911 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2022-11-03 02:43:35,912 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-11-03 02:43:35,912 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-11-03 02:43:35,912 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:43:35,912 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:43:35,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:43:35,912 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2022-11-03 02:43:35,913 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2022-11-03 02:43:35,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:43:35,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:43:35,913 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2022-11-03 02:43:35,913 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2022-11-03 02:43:36,023 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:43:36,025 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:43:36,803 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:43:37,050 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:43:37,051 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:43:37,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:43:37 BoogieIcfgContainer [2022-11-03 02:43:37,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:43:37,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:43:37,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:43:37,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:43:37,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:43:35" (1/3) ... [2022-11-03 02:43:37,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53fd190c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:43:37, skipping insertion in model container [2022-11-03 02:43:37,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:35" (2/3) ... [2022-11-03 02:43:37,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53fd190c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:43:37, skipping insertion in model container [2022-11-03 02:43:37,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:43:37" (3/3) ... [2022-11-03 02:43:37,064 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.5.ufo.BOUNDED-10.pals.c [2022-11-03 02:43:37,086 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:43:37,086 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:43:37,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:43:37,151 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;@130c7a43, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:43:37,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:43:37,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 142 states, 105 states have (on average 1.5238095238095237) internal successors, (160), 106 states have internal predecessors, (160), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-03 02:43:37,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:43:37,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:37,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:37,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:37,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:37,171 INFO L85 PathProgramCache]: Analyzing trace with hash 112183713, now seen corresponding path program 1 times [2022-11-03 02:43:37,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:37,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045400126] [2022-11-03 02:43:37,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:37,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:37,867 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 02:43:37,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:37,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045400126] [2022-11-03 02:43:37,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045400126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:37,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:37,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:43:37,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461258801] [2022-11-03 02:43:37,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:37,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:37,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:37,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:37,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:43:37,925 INFO L87 Difference]: Start difference. First operand has 142 states, 105 states have (on average 1.5238095238095237) internal successors, (160), 106 states have internal predecessors, (160), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:43:38,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:38,154 INFO L93 Difference]: Finished difference Result 285 states and 463 transitions. [2022-11-03 02:43:38,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:43:38,157 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 02:43:38,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:38,172 INFO L225 Difference]: With dead ends: 285 [2022-11-03 02:43:38,173 INFO L226 Difference]: Without dead ends: 145 [2022-11-03 02:43:38,183 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 02:43:38,189 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 5 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:38,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 584 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:43:38,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-03 02:43:38,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-11-03 02:43:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 108 states have (on average 1.4907407407407407) internal successors, (161), 108 states have internal predecessors, (161), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-03 02:43:38,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 219 transitions. [2022-11-03 02:43:38,272 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 219 transitions. Word has length 19 [2022-11-03 02:43:38,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:38,273 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 219 transitions. [2022-11-03 02:43:38,274 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 02:43:38,274 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 219 transitions. [2022-11-03 02:43:38,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 02:43:38,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:38,278 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:38,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:43:38,279 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:38,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:38,281 INFO L85 PathProgramCache]: Analyzing trace with hash -159919903, now seen corresponding path program 1 times [2022-11-03 02:43:38,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:38,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016429243] [2022-11-03 02:43:38,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:38,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:38,500 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 02:43:38,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:38,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016429243] [2022-11-03 02:43:38,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016429243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:38,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:38,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:43:38,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745329898] [2022-11-03 02:43:38,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:38,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:43:38,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:38,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:43:38,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:38,504 INFO L87 Difference]: Start difference. First operand 145 states and 219 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:43:38,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:38,892 INFO L93 Difference]: Finished difference Result 405 states and 624 transitions. [2022-11-03 02:43:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:43:38,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2022-11-03 02:43:38,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:38,896 INFO L225 Difference]: With dead ends: 405 [2022-11-03 02:43:38,896 INFO L226 Difference]: Without dead ends: 263 [2022-11-03 02:43:38,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:43:38,899 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 520 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:38,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 552 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:43:38,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-03 02:43:38,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 171. [2022-11-03 02:43:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 132 states have (on average 1.4848484848484849) internal successors, (196), 132 states have internal predecessors, (196), 30 states have call successors, (30), 8 states have call predecessors, (30), 8 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-03 02:43:38,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 256 transitions. [2022-11-03 02:43:38,924 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 256 transitions. Word has length 30 [2022-11-03 02:43:38,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:38,924 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 256 transitions. [2022-11-03 02:43:38,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:43:38,925 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 256 transitions. [2022-11-03 02:43:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:43:38,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:38,926 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:38,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:43:38,926 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:38,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:38,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1917724078, now seen corresponding path program 1 times [2022-11-03 02:43:38,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:38,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223562430] [2022-11-03 02:43:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:38,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:39,033 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 02:43:39,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:39,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223562430] [2022-11-03 02:43:39,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223562430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:39,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:39,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:43:39,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942550587] [2022-11-03 02:43:39,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:39,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:43:39,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:39,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:43:39,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:39,036 INFO L87 Difference]: Start difference. First operand 171 states and 256 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:43:39,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:39,369 INFO L93 Difference]: Finished difference Result 405 states and 622 transitions. [2022-11-03 02:43:39,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:43:39,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2022-11-03 02:43:39,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:39,375 INFO L225 Difference]: With dead ends: 405 [2022-11-03 02:43:39,375 INFO L226 Difference]: Without dead ends: 263 [2022-11-03 02:43:39,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:43:39,384 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 516 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:39,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 555 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:43:39,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-03 02:43:39,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 171. [2022-11-03 02:43:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 30 states have call successors, (30), 8 states have call predecessors, (30), 8 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-03 02:43:39,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 255 transitions. [2022-11-03 02:43:39,439 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 255 transitions. Word has length 31 [2022-11-03 02:43:39,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:39,439 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 255 transitions. [2022-11-03 02:43:39,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:43:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 255 transitions. [2022-11-03 02:43:39,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 02:43:39,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:39,442 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:39,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:43:39,443 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:39,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:39,445 INFO L85 PathProgramCache]: Analyzing trace with hash -862150769, now seen corresponding path program 1 times [2022-11-03 02:43:39,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:39,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933618934] [2022-11-03 02:43:39,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:39,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:39,652 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 02:43:39,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:39,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933618934] [2022-11-03 02:43:39,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933618934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:39,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:39,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:43:39,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395647161] [2022-11-03 02:43:39,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:39,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:39,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:39,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:39,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:43:39,657 INFO L87 Difference]: Start difference. First operand 171 states and 255 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:43:39,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:39,768 INFO L93 Difference]: Finished difference Result 318 states and 477 transitions. [2022-11-03 02:43:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:43:39,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-11-03 02:43:39,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:39,771 INFO L225 Difference]: With dead ends: 318 [2022-11-03 02:43:39,771 INFO L226 Difference]: Without dead ends: 176 [2022-11-03 02:43:39,772 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 02:43:39,774 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 6 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 596 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 02:43:39,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 596 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:43:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-03 02:43:39,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-11-03 02:43:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 136 states have (on average 1.463235294117647) internal successors, (199), 136 states have internal predecessors, (199), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-03 02:43:39,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 259 transitions. [2022-11-03 02:43:39,794 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 259 transitions. Word has length 33 [2022-11-03 02:43:39,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:39,795 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 259 transitions. [2022-11-03 02:43:39,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:43:39,796 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 259 transitions. [2022-11-03 02:43:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 02:43:39,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:39,797 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:39,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:43:39,798 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:39,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:39,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1592160469, now seen corresponding path program 1 times [2022-11-03 02:43:39,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:39,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932626723] [2022-11-03 02:43:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:39,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:40,083 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 02:43:40,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:40,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932626723] [2022-11-03 02:43:40,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932626723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:40,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:40,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:43:40,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073100677] [2022-11-03 02:43:40,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:40,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:40,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:40,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:40,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:43:40,087 INFO L87 Difference]: Start difference. First operand 176 states and 259 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:43:40,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:40,181 INFO L93 Difference]: Finished difference Result 328 states and 488 transitions. [2022-11-03 02:43:40,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:43:40,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-11-03 02:43:40,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:40,183 INFO L225 Difference]: With dead ends: 328 [2022-11-03 02:43:40,184 INFO L226 Difference]: Without dead ends: 181 [2022-11-03 02:43:40,185 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 02:43:40,185 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 6 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:40,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 582 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:43:40,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-03 02:43:40,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-11-03 02:43:40,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 140 states have (on average 1.45) internal successors, (203), 140 states have internal predecessors, (203), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-03 02:43:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 263 transitions. [2022-11-03 02:43:40,204 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 263 transitions. Word has length 41 [2022-11-03 02:43:40,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:40,204 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 263 transitions. [2022-11-03 02:43:40,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:43:40,205 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 263 transitions. [2022-11-03 02:43:40,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 02:43:40,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:40,206 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:40,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:43:40,207 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:40,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:40,208 INFO L85 PathProgramCache]: Analyzing trace with hash -929963329, now seen corresponding path program 1 times [2022-11-03 02:43:40,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:40,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452413059] [2022-11-03 02:43:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:40,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:40,369 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 02:43:40,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:40,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452413059] [2022-11-03 02:43:40,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452413059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:40,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:40,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:43:40,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37149571] [2022-11-03 02:43:40,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:40,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:40,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:40,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:40,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:43:40,372 INFO L87 Difference]: Start difference. First operand 181 states and 263 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 02:43:40,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:40,464 INFO L93 Difference]: Finished difference Result 337 states and 492 transitions. [2022-11-03 02:43:40,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:43:40,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2022-11-03 02:43:40,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:40,467 INFO L225 Difference]: With dead ends: 337 [2022-11-03 02:43:40,467 INFO L226 Difference]: Without dead ends: 185 [2022-11-03 02:43:40,468 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 02:43:40,470 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 5 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:40,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 591 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:43:40,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-03 02:43:40,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-03 02:43:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 143 states have (on average 1.4405594405594406) internal successors, (206), 143 states have internal predecessors, (206), 30 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-03 02:43:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2022-11-03 02:43:40,499 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 49 [2022-11-03 02:43:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:40,499 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2022-11-03 02:43:40,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 02:43:40,500 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2022-11-03 02:43:40,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 02:43:40,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:40,501 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:40,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:43:40,502 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:40,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:40,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1466495974, now seen corresponding path program 1 times [2022-11-03 02:43:40,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:40,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155786731] [2022-11-03 02:43:40,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:40,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:40,676 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 02:43:40,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:40,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155786731] [2022-11-03 02:43:40,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155786731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:40,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:40,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:43:40,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216463297] [2022-11-03 02:43:40,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:40,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:40,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:40,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:40,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:43:40,679 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 02:43:40,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:40,764 INFO L93 Difference]: Finished difference Result 346 states and 502 transitions. [2022-11-03 02:43:40,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:43:40,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2022-11-03 02:43:40,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:40,767 INFO L225 Difference]: With dead ends: 346 [2022-11-03 02:43:40,767 INFO L226 Difference]: Without dead ends: 190 [2022-11-03 02:43:40,767 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 02:43:40,768 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 6 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:40,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 582 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:43:40,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-03 02:43:40,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-11-03 02:43:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 147 states have (on average 1.4285714285714286) internal successors, (210), 147 states have internal predecessors, (210), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-03 02:43:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 270 transitions. [2022-11-03 02:43:40,785 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 270 transitions. Word has length 49 [2022-11-03 02:43:40,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:40,787 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 270 transitions. [2022-11-03 02:43:40,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 02:43:40,788 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 270 transitions. [2022-11-03 02:43:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:43:40,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:40,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:40,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:43:40,795 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:40,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:40,796 INFO L85 PathProgramCache]: Analyzing trace with hash 741511914, now seen corresponding path program 1 times [2022-11-03 02:43:40,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:40,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679343332] [2022-11-03 02:43:40,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:40,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:41,097 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 02:43:41,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:41,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679343332] [2022-11-03 02:43:41,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679343332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:41,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:41,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:43:41,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860268859] [2022-11-03 02:43:41,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:41,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:41,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:41,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:41,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:43:41,100 INFO L87 Difference]: Start difference. First operand 190 states and 270 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:43:41,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:41,183 INFO L93 Difference]: Finished difference Result 357 states and 509 transitions. [2022-11-03 02:43:41,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:43:41,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 57 [2022-11-03 02:43:41,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:41,185 INFO L225 Difference]: With dead ends: 357 [2022-11-03 02:43:41,186 INFO L226 Difference]: Without dead ends: 196 [2022-11-03 02:43:41,186 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 02:43:41,187 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 7 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:41,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 593 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:43:41,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-03 02:43:41,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-11-03 02:43:41,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 152 states have (on average 1.4144736842105263) internal successors, (215), 152 states have internal predecessors, (215), 30 states have call successors, (30), 13 states have call predecessors, (30), 13 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-03 02:43:41,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 275 transitions. [2022-11-03 02:43:41,203 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 275 transitions. Word has length 57 [2022-11-03 02:43:41,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:41,204 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 275 transitions. [2022-11-03 02:43:41,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:43:41,204 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 275 transitions. [2022-11-03 02:43:41,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 02:43:41,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:41,205 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:41,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:43:41,206 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:41,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:41,206 INFO L85 PathProgramCache]: Analyzing trace with hash -722649631, now seen corresponding path program 1 times [2022-11-03 02:43:41,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:41,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970425607] [2022-11-03 02:43:41,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:41,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:41,762 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 02:43:41,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:41,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970425607] [2022-11-03 02:43:41,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970425607] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:41,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269197379] [2022-11-03 02:43:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:41,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:41,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:41,768 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:41,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:43:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:41,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:43:41,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:42,170 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 02:43:42,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:42,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269197379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:42,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:43:42,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-11-03 02:43:42,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766882951] [2022-11-03 02:43:42,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:42,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:43:42,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:42,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:43:42,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:43:42,172 INFO L87 Difference]: Start difference. First operand 196 states and 275 transitions. Second operand has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:43:42,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:42,613 INFO L93 Difference]: Finished difference Result 569 states and 790 transitions. [2022-11-03 02:43:42,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:43:42,614 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 60 [2022-11-03 02:43:42,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:42,618 INFO L225 Difference]: With dead ends: 569 [2022-11-03 02:43:42,618 INFO L226 Difference]: Without dead ends: 376 [2022-11-03 02:43:42,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:43:42,621 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 216 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:42,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 1242 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:43:42,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-11-03 02:43:42,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 372. [2022-11-03 02:43:42,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 286 states have (on average 1.4055944055944056) internal successors, (402), 287 states have internal predecessors, (402), 59 states have call successors, (59), 26 states have call predecessors, (59), 26 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2022-11-03 02:43:42,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 520 transitions. [2022-11-03 02:43:42,681 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 520 transitions. Word has length 60 [2022-11-03 02:43:42,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:42,681 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 520 transitions. [2022-11-03 02:43:42,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:43:42,682 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 520 transitions. [2022-11-03 02:43:42,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 02:43:42,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:42,683 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:42,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:42,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:42,911 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:42,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:42,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1111739864, now seen corresponding path program 1 times [2022-11-03 02:43:42,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:42,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489246095] [2022-11-03 02:43:42,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:42,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:43,354 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 02:43:43,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:43,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489246095] [2022-11-03 02:43:43,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489246095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:43,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828105141] [2022-11-03 02:43:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:43,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:43,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:43,356 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:43,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:43:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:43,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:43:43,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:43,924 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 02:43:43,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:44,141 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 02:43:44,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828105141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:44,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1075381614] [2022-11-03 02:43:44,169 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-11-03 02:43:44,170 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:43:44,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:43:44,183 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:43:44,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:43:51,696 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 153 for LOIs [2022-11-03 02:43:52,169 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 02:43:52,183 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 02:43:52,236 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:44:14,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1075381614] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:14,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:44:14,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [9, 9, 9] total 37 [2022-11-03 02:44:14,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354465810] [2022-11-03 02:44:14,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:14,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:44:14,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:14,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:44:14,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:44:14,400 INFO L87 Difference]: Start difference. First operand 372 states and 520 transitions. Second operand has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 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 02:44:20,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:20,324 INFO L93 Difference]: Finished difference Result 804 states and 1134 transitions. [2022-11-03 02:44:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:44:20,325 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 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 62 [2022-11-03 02:44:20,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:20,329 INFO L225 Difference]: With dead ends: 804 [2022-11-03 02:44:20,329 INFO L226 Difference]: Without dead ends: 457 [2022-11-03 02:44:20,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 154 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:44:20,331 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 96 mSDsluCounter, 3442 mSDsCounter, 0 mSdLazyCounter, 1690 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 3703 SdHoareTripleChecker+Invalid, 2145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 443 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:20,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 3703 Invalid, 2145 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [12 Valid, 1690 Invalid, 0 Unknown, 443 Unchecked, 4.5s Time] [2022-11-03 02:44:20,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-03 02:44:20,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 434. [2022-11-03 02:44:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 330 states have (on average 1.378787878787879) internal successors, (455), 331 states have internal predecessors, (455), 74 states have call successors, (74), 29 states have call predecessors, (74), 29 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-03 02:44:20,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 603 transitions. [2022-11-03 02:44:20,415 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 603 transitions. Word has length 62 [2022-11-03 02:44:20,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:20,415 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 603 transitions. [2022-11-03 02:44:20,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 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 02:44:20,416 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 603 transitions. [2022-11-03 02:44:20,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 02:44:20,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:20,418 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:20,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:20,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:44:20,635 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:20,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:20,636 INFO L85 PathProgramCache]: Analyzing trace with hash -763901023, now seen corresponding path program 1 times [2022-11-03 02:44:20,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:20,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184740649] [2022-11-03 02:44:20,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:20,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:21,090 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 02:44:21,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:21,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184740649] [2022-11-03 02:44:21,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184740649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:44:21,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119469616] [2022-11-03 02:44:21,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:21,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:21,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:21,092 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:44:21,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:44:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:21,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:44:21,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:21,559 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 02:44:21,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:21,757 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 02:44:21,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119469616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:21,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [421407983] [2022-11-03 02:44:21,760 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-11-03 02:44:21,761 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:44:21,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:44:21,761 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:44:21,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:44:24,875 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 111 for LOIs [2022-11-03 02:44:25,013 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 02:44:25,022 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 02:44:25,056 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:44:41,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [421407983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:41,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:44:41,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [9, 9, 9] total 37 [2022-11-03 02:44:41,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262074070] [2022-11-03 02:44:41,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:41,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:44:41,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:41,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:44:41,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:44:41,982 INFO L87 Difference]: Start difference. First operand 434 states and 603 transitions. Second operand has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 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 02:44:51,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:51,538 INFO L93 Difference]: Finished difference Result 847 states and 1189 transitions. [2022-11-03 02:44:51,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:44:51,539 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 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 62 [2022-11-03 02:44:51,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:51,542 INFO L225 Difference]: With dead ends: 847 [2022-11-03 02:44:51,542 INFO L226 Difference]: Without dead ends: 507 [2022-11-03 02:44:51,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 154 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:44:51,544 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 137 mSDsluCounter, 3362 mSDsCounter, 0 mSdLazyCounter, 2200 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 3629 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:51,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 3629 Invalid, 2252 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [52 Valid, 2200 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-03 02:44:51,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-11-03 02:44:51,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 484. [2022-11-03 02:44:51,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 363 states have (on average 1.3636363636363635) internal successors, (495), 364 states have internal predecessors, (495), 88 states have call successors, (88), 32 states have call predecessors, (88), 32 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) [2022-11-03 02:44:51,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 671 transitions. [2022-11-03 02:44:51,654 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 671 transitions. Word has length 62 [2022-11-03 02:44:51,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:51,654 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 671 transitions. [2022-11-03 02:44:51,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 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 02:44:51,654 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 671 transitions. [2022-11-03 02:44:51,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 02:44:51,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:51,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:51,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:51,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:51,871 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:51,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:51,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1017460184, now seen corresponding path program 1 times [2022-11-03 02:44:51,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:51,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032491280] [2022-11-03 02:44:51,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:51,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:44:52,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:52,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032491280] [2022-11-03 02:44:52,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032491280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:44:52,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191560775] [2022-11-03 02:44:52,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:52,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:52,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:52,372 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:44:52,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:44:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:52,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:44:52,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:52,868 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 02:44:52,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:53,063 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 02:44:53,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191560775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:53,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [740391891] [2022-11-03 02:44:53,066 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2022-11-03 02:44:53,067 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:44:53,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:44:53,067 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:44:53,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:45:14,796 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 185 for LOIs [2022-11-03 02:45:17,844 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 02:45:17,852 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 103 for LOIs [2022-11-03 02:45:17,888 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:45:37,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [740391891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:37,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:45:37,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [9, 9, 9] total 39 [2022-11-03 02:45:37,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41966121] [2022-11-03 02:45:37,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:37,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:45:37,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:37,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:45:37,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1344, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:45:37,392 INFO L87 Difference]: Start difference. First operand 484 states and 671 transitions. Second operand has 28 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 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 02:45:49,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:49,573 INFO L93 Difference]: Finished difference Result 897 states and 1260 transitions. [2022-11-03 02:45:49,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 02:45:49,574 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 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 64 [2022-11-03 02:45:49,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:49,578 INFO L225 Difference]: With dead ends: 897 [2022-11-03 02:45:49,578 INFO L226 Difference]: Without dead ends: 557 [2022-11-03 02:45:49,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 158 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=179, Invalid=1801, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 02:45:49,586 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 153 mSDsluCounter, 3535 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 3824 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:49,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 3824 Invalid, 2323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2264 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-03 02:45:49,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-11-03 02:45:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 508. [2022-11-03 02:45:49,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 379 states have (on average 1.345646437994723) internal successors, (510), 380 states have internal predecessors, (510), 94 states have call successors, (94), 34 states have call predecessors, (94), 34 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 02:45:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 698 transitions. [2022-11-03 02:45:49,698 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 698 transitions. Word has length 64 [2022-11-03 02:45:49,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:49,699 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 698 transitions. [2022-11-03 02:45:49,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 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 02:45:49,699 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 698 transitions. [2022-11-03 02:45:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 02:45:49,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:49,704 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 02:45:49,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:49,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:49,931 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:49,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:49,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1658988521, now seen corresponding path program 1 times [2022-11-03 02:45:49,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:49,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184138425] [2022-11-03 02:45:49,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:49,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:50,116 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 02:45:50,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:50,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184138425] [2022-11-03 02:45:50,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184138425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:50,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:50,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:45:50,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623206417] [2022-11-03 02:45:50,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:50,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:45:50,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:50,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:45:50,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:45:50,119 INFO L87 Difference]: Start difference. First operand 508 states and 698 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 02:45:50,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:50,302 INFO L93 Difference]: Finished difference Result 908 states and 1274 transitions. [2022-11-03 02:45:50,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:45:50,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 66 [2022-11-03 02:45:50,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:50,308 INFO L225 Difference]: With dead ends: 908 [2022-11-03 02:45:50,308 INFO L226 Difference]: Without dead ends: 516 [2022-11-03 02:45:50,310 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 02:45:50,311 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 5 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:50,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 591 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:50,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-11-03 02:45:50,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2022-11-03 02:45:50,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 385 states have (on average 1.3402597402597403) internal successors, (516), 386 states have internal predecessors, (516), 94 states have call successors, (94), 36 states have call predecessors, (94), 36 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 02:45:50,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 704 transitions. [2022-11-03 02:45:50,454 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 704 transitions. Word has length 66 [2022-11-03 02:45:50,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:50,455 INFO L495 AbstractCegarLoop]: Abstraction has 516 states and 704 transitions. [2022-11-03 02:45:50,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 02:45:50,455 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 704 transitions. [2022-11-03 02:45:50,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:45:50,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:50,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:50,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:45:50,463 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:50,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:50,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1906005448, now seen corresponding path program 1 times [2022-11-03 02:45:50,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:50,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632596932] [2022-11-03 02:45:50,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:50,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:50,887 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 02:45:50,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:50,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632596932] [2022-11-03 02:45:50,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632596932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:50,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969837702] [2022-11-03 02:45:50,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:50,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:50,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:50,889 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:50,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:45:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:51,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:45:51,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:51,279 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 02:45:51,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:51,441 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 02:45:51,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969837702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:51,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1572753203] [2022-11-03 02:45:51,444 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2022-11-03 02:45:51,444 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:45:51,444 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:45:51,444 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:45:51,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:45:57,255 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 73 for LOIs [2022-11-03 02:45:57,269 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 02:45:57,278 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 115 for LOIs [2022-11-03 02:45:57,329 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 111 for LOIs [2022-11-03 02:45:57,358 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 108 for LOIs [2022-11-03 02:45:57,391 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 02:45:57,422 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:46:32,530 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15851#(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 02:46:32,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:46:32,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:46:32,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-03 02:46:32,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636455719] [2022-11-03 02:46:32,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:46:32,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:46:32,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:32,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:46:32,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2806, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 02:46:32,533 INFO L87 Difference]: Start difference. First operand 516 states and 704 transitions. Second operand has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-03 02:46:33,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:33,374 INFO L93 Difference]: Finished difference Result 1240 states and 1722 transitions. [2022-11-03 02:46:33,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:46:33,375 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 70 [2022-11-03 02:46:33,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:33,379 INFO L225 Difference]: With dead ends: 1240 [2022-11-03 02:46:33,380 INFO L226 Difference]: Without dead ends: 856 [2022-11-03 02:46:33,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 154 SyntacticMatches, 10 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=300, Invalid=3360, Unknown=0, NotChecked=0, Total=3660 [2022-11-03 02:46:33,382 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 299 mSDsluCounter, 2154 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 2369 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:33,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 2369 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:46:33,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-11-03 02:46:33,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 533. [2022-11-03 02:46:33,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 395 states have (on average 1.2936708860759494) internal successors, (511), 397 states have internal predecessors, (511), 92 states have call successors, (92), 45 states have call predecessors, (92), 45 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-03 02:46:33,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 695 transitions. [2022-11-03 02:46:33,538 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 695 transitions. Word has length 70 [2022-11-03 02:46:33,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:33,539 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 695 transitions. [2022-11-03 02:46:33,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-03 02:46:33,539 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 695 transitions. [2022-11-03 02:46:33,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:46:33,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:33,541 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:33,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:33,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:46:33,765 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:33,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:33,765 INFO L85 PathProgramCache]: Analyzing trace with hash -187631067, now seen corresponding path program 1 times [2022-11-03 02:46:33,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:33,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342329690] [2022-11-03 02:46:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:33,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:34,067 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 02:46:34,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:34,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342329690] [2022-11-03 02:46:34,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342329690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:34,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:46:34,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:46:34,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575152101] [2022-11-03 02:46:34,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:34,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:46:34,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:34,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:46:34,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:46:34,070 INFO L87 Difference]: Start difference. First operand 533 states and 695 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:46:35,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:35,044 INFO L93 Difference]: Finished difference Result 1175 states and 1614 transitions. [2022-11-03 02:46:35,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:46:35,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 71 [2022-11-03 02:46:35,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:35,049 INFO L225 Difference]: With dead ends: 1175 [2022-11-03 02:46:35,050 INFO L226 Difference]: Without dead ends: 880 [2022-11-03 02:46:35,051 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 02:46:35,052 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 640 mSDsluCounter, 1563 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:35,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 2007 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:46:35,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-11-03 02:46:35,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 672. [2022-11-03 02:46:35,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 497 states have (on average 1.3058350100603622) internal successors, (649), 500 states have internal predecessors, (649), 116 states have call successors, (116), 58 states have call predecessors, (116), 58 states have return successors, (116), 113 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-03 02:46:35,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 881 transitions. [2022-11-03 02:46:35,269 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 881 transitions. Word has length 71 [2022-11-03 02:46:35,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:35,269 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 881 transitions. [2022-11-03 02:46:35,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:46:35,270 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 881 transitions. [2022-11-03 02:46:35,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:46:35,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:35,272 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:35,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 02:46:35,273 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:35,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:35,273 INFO L85 PathProgramCache]: Analyzing trace with hash 781313203, now seen corresponding path program 1 times [2022-11-03 02:46:35,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:35,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338446530] [2022-11-03 02:46:35,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:35,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:35,557 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 02:46:35,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:35,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338446530] [2022-11-03 02:46:35,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338446530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:35,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:46:35,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:46:35,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038533436] [2022-11-03 02:46:35,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:35,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:46:35,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:35,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:46:35,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:46:35,560 INFO L87 Difference]: Start difference. First operand 672 states and 881 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 02:46:36,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:36,673 INFO L93 Difference]: Finished difference Result 1545 states and 2127 transitions. [2022-11-03 02:46:36,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:46:36,674 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 73 [2022-11-03 02:46:36,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:36,679 INFO L225 Difference]: With dead ends: 1545 [2022-11-03 02:46:36,680 INFO L226 Difference]: Without dead ends: 1215 [2022-11-03 02:46:36,681 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 02:46:36,682 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 596 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 1634 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:36,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 1634 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:46:36,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2022-11-03 02:46:36,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 928. [2022-11-03 02:46:36,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 680 states have (on average 1.313235294117647) internal successors, (893), 685 states have internal predecessors, (893), 165 states have call successors, (165), 82 states have call predecessors, (165), 82 states have return successors, (165), 160 states have call predecessors, (165), 165 states have call successors, (165) [2022-11-03 02:46:36,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1223 transitions. [2022-11-03 02:46:36,892 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1223 transitions. Word has length 73 [2022-11-03 02:46:36,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:36,892 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1223 transitions. [2022-11-03 02:46:36,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 02:46:36,893 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1223 transitions. [2022-11-03 02:46:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 02:46:36,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:36,894 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:36,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 02:46:36,895 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:36,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:36,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1143833407, now seen corresponding path program 1 times [2022-11-03 02:46:36,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:36,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590550212] [2022-11-03 02:46:36,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:36,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:46:37,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:37,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590550212] [2022-11-03 02:46:37,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590550212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:37,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832670725] [2022-11-03 02:46:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:37,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:37,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:37,215 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:37,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:46:37,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:37,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:46:37,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:46:37,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:37,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832670725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:37,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:46:37,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-03 02:46:37,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540141705] [2022-11-03 02:46:37,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:37,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:46:37,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:37,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:46:37,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:46:37,509 INFO L87 Difference]: Start difference. First operand 928 states and 1223 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:46:38,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:38,382 INFO L93 Difference]: Finished difference Result 1787 states and 2419 transitions. [2022-11-03 02:46:38,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:46:38,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2022-11-03 02:46:38,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:38,387 INFO L225 Difference]: With dead ends: 1787 [2022-11-03 02:46:38,388 INFO L226 Difference]: Without dead ends: 1093 [2022-11-03 02:46:38,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:46:38,390 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 486 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:38,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1544 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:46:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-11-03 02:46:38,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 928. [2022-11-03 02:46:38,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 680 states have (on average 1.3073529411764706) internal successors, (889), 685 states have internal predecessors, (889), 165 states have call successors, (165), 82 states have call predecessors, (165), 82 states have return successors, (165), 160 states have call predecessors, (165), 165 states have call successors, (165) [2022-11-03 02:46:38,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1219 transitions. [2022-11-03 02:46:38,657 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1219 transitions. Word has length 77 [2022-11-03 02:46:38,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:38,658 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1219 transitions. [2022-11-03 02:46:38,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:46:38,658 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1219 transitions. [2022-11-03 02:46:38,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 02:46:38,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:38,660 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:38,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:38,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:46:38,876 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:38,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:38,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1918981978, now seen corresponding path program 1 times [2022-11-03 02:46:38,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:38,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977746263] [2022-11-03 02:46:38,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:38,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:38,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:46:39,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:39,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977746263] [2022-11-03 02:46:39,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977746263] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:39,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404175945] [2022-11-03 02:46:39,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:39,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:39,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:39,203 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:39,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:46:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:39,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:46:39,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:39,461 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 02:46:39,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:39,605 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 02:46:39,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404175945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:39,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1734931312] [2022-11-03 02:46:39,607 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-11-03 02:46:39,607 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:46:39,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:46:39,608 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:46:39,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:46:42,707 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 111 for LOIs [2022-11-03 02:46:42,804 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 02:46:42,812 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 104 for LOIs [2022-11-03 02:46:42,901 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 02:46:42,932 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:47:10,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1734931312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:10,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:47:10,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [8, 9, 9] total 49 [2022-11-03 02:47:10,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339791031] [2022-11-03 02:47:10,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:10,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 02:47:10,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:10,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 02:47:10,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2150, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 02:47:10,881 INFO L87 Difference]: Start difference. First operand 928 states and 1219 transitions. Second operand has 38 states, 32 states have (on average 1.5) internal successors, (48), 26 states have internal predecessors, (48), 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 02:47:28,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:28,982 INFO L93 Difference]: Finished difference Result 1491 states and 1979 transitions. [2022-11-03 02:47:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 02:47:28,983 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 32 states have (on average 1.5) internal successors, (48), 26 states have internal predecessors, (48), 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 77 [2022-11-03 02:47:28,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:28,987 INFO L225 Difference]: With dead ends: 1491 [2022-11-03 02:47:28,987 INFO L226 Difference]: Without dead ends: 914 [2022-11-03 02:47:28,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 183 SyntacticMatches, 10 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=353, Invalid=3307, Unknown=0, NotChecked=0, Total=3660 [2022-11-03 02:47:28,990 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 164 mSDsluCounter, 2687 mSDsCounter, 0 mSdLazyCounter, 2278 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 2887 SdHoareTripleChecker+Invalid, 2355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:28,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 2887 Invalid, 2355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2278 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-03 02:47:28,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-11-03 02:47:29,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 914. [2022-11-03 02:47:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 670 states have (on average 1.3059701492537314) internal successors, (875), 675 states have internal predecessors, (875), 162 states have call successors, (162), 81 states have call predecessors, (162), 81 states have return successors, (162), 157 states have call predecessors, (162), 162 states have call successors, (162) [2022-11-03 02:47:29,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1199 transitions. [2022-11-03 02:47:29,262 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1199 transitions. Word has length 77 [2022-11-03 02:47:29,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:29,262 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1199 transitions. [2022-11-03 02:47:29,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 32 states have (on average 1.5) internal successors, (48), 26 states have internal predecessors, (48), 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 02:47:29,263 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1199 transitions. [2022-11-03 02:47:29,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 02:47:29,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:29,265 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:29,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:29,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:47:29,491 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:29,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:29,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2052494362, now seen corresponding path program 1 times [2022-11-03 02:47:29,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:29,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752126726] [2022-11-03 02:47:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:29,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:29,704 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 02:47:29,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:29,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752126726] [2022-11-03 02:47:29,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752126726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:29,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:47:29,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:47:29,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165850132] [2022-11-03 02:47:29,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:29,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:47:29,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:29,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:47:29,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:47:29,707 INFO L87 Difference]: Start difference. First operand 914 states and 1199 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 02:47:30,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:30,208 INFO L93 Difference]: Finished difference Result 1203 states and 1647 transitions. [2022-11-03 02:47:30,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:47:30,208 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 80 [2022-11-03 02:47:30,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:30,214 INFO L225 Difference]: With dead ends: 1203 [2022-11-03 02:47:30,215 INFO L226 Difference]: Without dead ends: 1201 [2022-11-03 02:47:30,216 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 02:47:30,217 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 157 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:30,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 1438 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:47:30,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-11-03 02:47:30,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 915. [2022-11-03 02:47:30,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 669 states have (on average 1.3064275037369208) internal successors, (874), 675 states have internal predecessors, (874), 163 states have call successors, (163), 82 states have call predecessors, (163), 82 states have return successors, (163), 157 states have call predecessors, (163), 163 states have call successors, (163) [2022-11-03 02:47:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1200 transitions. [2022-11-03 02:47:30,447 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1200 transitions. Word has length 80 [2022-11-03 02:47:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:30,448 INFO L495 AbstractCegarLoop]: Abstraction has 915 states and 1200 transitions. [2022-11-03 02:47:30,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 02:47:30,448 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1200 transitions. [2022-11-03 02:47:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:47:30,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:30,450 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:30,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-03 02:47:30,450 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:30,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:30,450 INFO L85 PathProgramCache]: Analyzing trace with hash -11984434, now seen corresponding path program 1 times [2022-11-03 02:47:30,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:30,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170364071] [2022-11-03 02:47:30,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:30,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:47:30,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:30,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170364071] [2022-11-03 02:47:30,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170364071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:30,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:47:30,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:47:30,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927485552] [2022-11-03 02:47:30,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:30,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:47:30,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:30,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:47:30,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:47:30,628 INFO L87 Difference]: Start difference. First operand 915 states and 1200 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 02:47:30,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:30,903 INFO L93 Difference]: Finished difference Result 1568 states and 2072 transitions. [2022-11-03 02:47:30,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:47:30,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 83 [2022-11-03 02:47:30,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:30,908 INFO L225 Difference]: With dead ends: 1568 [2022-11-03 02:47:30,909 INFO L226 Difference]: Without dead ends: 903 [2022-11-03 02:47:30,911 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 02:47:30,911 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 7 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:30,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 583 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:47:30,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-11-03 02:47:31,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 903. [2022-11-03 02:47:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 663 states have (on average 1.2820512820512822) internal successors, (850), 669 states have internal predecessors, (850), 157 states have call successors, (157), 82 states have call predecessors, (157), 82 states have return successors, (157), 151 states have call predecessors, (157), 157 states have call successors, (157) [2022-11-03 02:47:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1164 transitions. [2022-11-03 02:47:31,116 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1164 transitions. Word has length 83 [2022-11-03 02:47:31,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:31,117 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1164 transitions. [2022-11-03 02:47:31,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 02:47:31,117 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1164 transitions. [2022-11-03 02:47:31,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-03 02:47:31,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:31,119 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:31,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-03 02:47:31,119 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:31,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:31,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1928720689, now seen corresponding path program 1 times [2022-11-03 02:47:31,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:31,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788637095] [2022-11-03 02:47:31,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:31,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:47:31,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:31,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788637095] [2022-11-03 02:47:31,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788637095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:31,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086992470] [2022-11-03 02:47:31,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:31,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:31,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:31,502 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:31,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:47:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:31,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:47:31,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:31,748 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 02:47:31,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:31,875 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 02:47:31,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086992470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:31,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [944604403] [2022-11-03 02:47:31,879 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-03 02:47:31,879 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:47:31,879 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:47:31,880 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:47:31,880 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:47:37,713 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 153 for LOIs [2022-11-03 02:47:38,062 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 02:47:38,075 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 104 for LOIs [2022-11-03 02:47:38,169 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 110 for LOIs [2022-11-03 02:47:38,205 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 02:47:38,238 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:48:15,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [944604403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:48:15,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:48:15,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [8, 9, 9] total 55 [2022-11-03 02:48:15,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601931657] [2022-11-03 02:48:15,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:48:15,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:48:15,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:48:15,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:48:15,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2701, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 02:48:15,491 INFO L87 Difference]: Start difference. First operand 903 states and 1164 transitions. Second operand has 44 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 30 states have internal predecessors, (50), 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 02:48:23,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:23,536 INFO L93 Difference]: Finished difference Result 1517 states and 1987 transitions. [2022-11-03 02:48:23,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-03 02:48:23,537 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 30 states have internal predecessors, (50), 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 85 [2022-11-03 02:48:23,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:23,541 INFO L225 Difference]: With dead ends: 1517 [2022-11-03 02:48:23,541 INFO L226 Difference]: Without dead ends: 945 [2022-11-03 02:48:23,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 199 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=286, Invalid=2906, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 02:48:23,544 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 296 mSDsluCounter, 4368 mSDsCounter, 0 mSdLazyCounter, 2647 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 4608 SdHoareTripleChecker+Invalid, 3415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 661 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:23,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 4608 Invalid, 3415 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [107 Valid, 2647 Invalid, 0 Unknown, 661 Unchecked, 5.8s Time] [2022-11-03 02:48:23,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-11-03 02:48:23,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 906. [2022-11-03 02:48:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 665 states have (on average 1.281203007518797) internal successors, (852), 671 states have internal predecessors, (852), 158 states have call successors, (158), 82 states have call predecessors, (158), 82 states have return successors, (158), 152 states have call predecessors, (158), 158 states have call successors, (158) [2022-11-03 02:48:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1168 transitions. [2022-11-03 02:48:23,833 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1168 transitions. Word has length 85 [2022-11-03 02:48:23,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:23,833 INFO L495 AbstractCegarLoop]: Abstraction has 906 states and 1168 transitions. [2022-11-03 02:48:23,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 30 states have internal predecessors, (50), 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 02:48:23,834 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1168 transitions. [2022-11-03 02:48:23,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-03 02:48:23,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:23,835 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:23,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:24,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:24,063 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:24,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:24,063 INFO L85 PathProgramCache]: Analyzing trace with hash -727189300, now seen corresponding path program 1 times [2022-11-03 02:48:24,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:48:24,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352437209] [2022-11-03 02:48:24,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:24,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:48:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:24,483 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 02:48:24,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:48:24,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352437209] [2022-11-03 02:48:24,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352437209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:48:24,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518332587] [2022-11-03 02:48:24,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:24,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:24,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:24,485 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:24,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:48:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:24,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:48:24,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:24,939 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 02:48:24,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:25,126 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 02:48:25,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518332587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:25,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [448757885] [2022-11-03 02:48:25,129 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-03 02:48:25,129 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:48:25,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:48:25,129 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:48:25,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:48:28,748 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 73 for LOIs [2022-11-03 02:48:28,762 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 02:48:28,772 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 104 for LOIs [2022-11-03 02:48:28,864 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 115 for LOIs [2022-11-03 02:48:28,898 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 111 for LOIs [2022-11-03 02:48:28,932 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 02:48:28,963 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:49:09,713 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41646#(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 02:49:09,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:49:09,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:49:09,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-03 02:49:09,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273333119] [2022-11-03 02:49:09,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:49:09,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:49:09,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:09,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:49:09,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=3445, Unknown=0, NotChecked=0, Total=3782 [2022-11-03 02:49:09,716 INFO L87 Difference]: Start difference. First operand 906 states and 1168 transitions. Second operand has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-03 02:49:10,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:10,683 INFO L93 Difference]: Finished difference Result 1863 states and 2467 transitions. [2022-11-03 02:49:10,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:49:10,684 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 85 [2022-11-03 02:49:10,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:10,690 INFO L225 Difference]: With dead ends: 1863 [2022-11-03 02:49:10,691 INFO L226 Difference]: Without dead ends: 1135 [2022-11-03 02:49:10,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 189 SyntacticMatches, 13 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=363, Invalid=4059, Unknown=0, NotChecked=0, Total=4422 [2022-11-03 02:49:10,695 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 228 mSDsluCounter, 2437 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 2571 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:10,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 2571 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:49:10,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2022-11-03 02:49:11,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 885. [2022-11-03 02:49:11,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 650 states have (on average 1.2738461538461539) internal successors, (828), 656 states have internal predecessors, (828), 152 states have call successors, (152), 82 states have call predecessors, (152), 82 states have return successors, (152), 146 states have call predecessors, (152), 152 states have call successors, (152) [2022-11-03 02:49:11,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1132 transitions. [2022-11-03 02:49:11,008 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1132 transitions. Word has length 85 [2022-11-03 02:49:11,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:11,009 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 1132 transitions. [2022-11-03 02:49:11,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-03 02:49:11,009 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1132 transitions. [2022-11-03 02:49:11,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 02:49:11,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:11,011 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:11,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:11,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-03 02:49:11,227 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:11,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:11,227 INFO L85 PathProgramCache]: Analyzing trace with hash 41973455, now seen corresponding path program 1 times [2022-11-03 02:49:11,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:11,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140319719] [2022-11-03 02:49:11,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:11,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:49:11,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:11,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140319719] [2022-11-03 02:49:11,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140319719] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:11,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941789839] [2022-11-03 02:49:11,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:11,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:11,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:11,563 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:11,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:49:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:11,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:49:11,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:11,831 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 02:49:11,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:11,982 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 02:49:11,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941789839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:11,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1325385435] [2022-11-03 02:49:11,985 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-03 02:49:11,985 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:49:11,985 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:49:11,985 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:49:11,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:49:35,391 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 208 for LOIs [2022-11-03 02:49:40,224 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 02:49:40,234 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 103 for LOIs [2022-11-03 02:49:40,325 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 109 for LOIs [2022-11-03 02:49:40,355 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 103 for LOIs [2022-11-03 02:49:40,387 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:50:18,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1325385435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:18,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:50:18,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [8, 9, 9] total 57 [2022-11-03 02:50:18,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50114706] [2022-11-03 02:50:18,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:18,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-03 02:50:18,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:18,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-03 02:50:18,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2927, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 02:50:18,195 INFO L87 Difference]: Start difference. First operand 885 states and 1132 transitions. Second operand has 46 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 32 states have internal predecessors, (52), 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 02:50:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:47,436 INFO L93 Difference]: Finished difference Result 1481 states and 1928 transitions. [2022-11-03 02:50:47,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-03 02:50:47,437 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 32 states have internal predecessors, (52), 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 87 [2022-11-03 02:50:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:47,439 INFO L225 Difference]: With dead ends: 1481 [2022-11-03 02:50:47,439 INFO L226 Difference]: Without dead ends: 920 [2022-11-03 02:50:47,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 203 SyntacticMatches, 12 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 57.7s TimeCoverageRelationStatistics Valid=498, Invalid=5052, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 02:50:47,442 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 186 mSDsluCounter, 4957 mSDsCounter, 0 mSdLazyCounter, 3938 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 5230 SdHoareTripleChecker+Invalid, 4039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:47,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 5230 Invalid, 4039 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [101 Valid, 3938 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-11-03 02:50:47,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-11-03 02:50:47,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 888. [2022-11-03 02:50:47,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 652 states have (on average 1.2730061349693251) internal successors, (830), 658 states have internal predecessors, (830), 153 states have call successors, (153), 82 states have call predecessors, (153), 82 states have return successors, (153), 147 states have call predecessors, (153), 153 states have call successors, (153) [2022-11-03 02:50:47,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1136 transitions. [2022-11-03 02:50:47,677 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1136 transitions. Word has length 87 [2022-11-03 02:50:47,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:47,678 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1136 transitions. [2022-11-03 02:50:47,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 32 states have internal predecessors, (52), 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 02:50:47,678 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1136 transitions. [2022-11-03 02:50:47,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:50:47,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:47,680 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:47,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:47,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-03 02:50:47,897 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:47,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:47,897 INFO L85 PathProgramCache]: Analyzing trace with hash -639052277, now seen corresponding path program 1 times [2022-11-03 02:50:47,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:47,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709904017] [2022-11-03 02:50:47,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:47,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:50:48,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:48,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709904017] [2022-11-03 02:50:48,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709904017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:50:48,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121579250] [2022-11-03 02:50:48,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:48,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:48,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:48,249 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:48,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:50:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:48,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:50:48,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:50:48,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:50:48,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121579250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:50:48,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [746981710] [2022-11-03 02:50:48,701 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-03 02:50:48,701 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:50:48,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:50:48,702 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:50:48,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:50:54,887 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 153 for LOIs [2022-11-03 02:50:55,306 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 02:50:55,314 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 104 for LOIs [2022-11-03 02:50:55,405 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 126 for LOIs [2022-11-03 02:50:55,770 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2022-11-03 02:50:55,817 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:51:39,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [746981710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:39,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:51:39,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [8, 9, 9] total 59 [2022-11-03 02:51:39,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140510791] [2022-11-03 02:51:39,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:39,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 02:51:39,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:39,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 02:51:39,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=3099, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 02:51:39,608 INFO L87 Difference]: Start difference. First operand 888 states and 1136 transitions. Second operand has 48 states, 40 states have (on average 1.325) internal successors, (53), 33 states have internal predecessors, (53), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-03 02:51:47,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:47,275 INFO L93 Difference]: Finished difference Result 1471 states and 1911 transitions. [2022-11-03 02:51:47,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-03 02:51:47,276 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 40 states have (on average 1.325) internal successors, (53), 33 states have internal predecessors, (53), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 92 [2022-11-03 02:51:47,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:47,280 INFO L225 Difference]: With dead ends: 1471 [2022-11-03 02:51:47,280 INFO L226 Difference]: Without dead ends: 910 [2022-11-03 02:51:47,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 218 SyntacticMatches, 10 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=340, Invalid=3320, Unknown=0, NotChecked=0, Total=3660 [2022-11-03 02:51:47,282 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 208 mSDsluCounter, 3404 mSDsCounter, 0 mSdLazyCounter, 2599 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 3632 SdHoareTripleChecker+Invalid, 2928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:47,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 3632 Invalid, 2928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2599 Invalid, 0 Unknown, 245 Unchecked, 5.5s Time] [2022-11-03 02:51:47,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-11-03 02:51:47,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 875. [2022-11-03 02:51:47,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 643 states have (on average 1.270606531881804) internal successors, (817), 649 states have internal predecessors, (817), 149 states have call successors, (149), 82 states have call predecessors, (149), 82 states have return successors, (149), 143 states have call predecessors, (149), 149 states have call successors, (149) [2022-11-03 02:51:47,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1115 transitions. [2022-11-03 02:51:47,541 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1115 transitions. Word has length 92 [2022-11-03 02:51:47,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:47,542 INFO L495 AbstractCegarLoop]: Abstraction has 875 states and 1115 transitions. [2022-11-03 02:51:47,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 40 states have (on average 1.325) internal successors, (53), 33 states have internal predecessors, (53), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-03 02:51:47,542 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1115 transitions. [2022-11-03 02:51:47,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:51:47,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:47,544 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:47,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:47,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:47,759 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:47,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:47,759 INFO L85 PathProgramCache]: Analyzing trace with hash -323716822, now seen corresponding path program 1 times [2022-11-03 02:51:47,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:47,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261929458] [2022-11-03 02:51:47,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:47,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:51:47,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:47,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261929458] [2022-11-03 02:51:47,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261929458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:47,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:47,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:51:47,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813034618] [2022-11-03 02:51:47,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:47,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:51:47,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:47,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:51:47,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:51:47,944 INFO L87 Difference]: Start difference. First operand 875 states and 1115 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-03 02:51:48,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:48,245 INFO L93 Difference]: Finished difference Result 1489 states and 1921 transitions. [2022-11-03 02:51:48,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:51:48,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 92 [2022-11-03 02:51:48,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:48,250 INFO L225 Difference]: With dead ends: 1489 [2022-11-03 02:51:48,250 INFO L226 Difference]: Without dead ends: 863 [2022-11-03 02:51:48,251 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 02:51:48,252 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 7 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:48,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 565 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:51:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-11-03 02:51:48,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 863. [2022-11-03 02:51:48,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 637 states have (on average 1.2448979591836735) internal successors, (793), 643 states have internal predecessors, (793), 143 states have call successors, (143), 82 states have call predecessors, (143), 82 states have return successors, (143), 137 states have call predecessors, (143), 143 states have call successors, (143) [2022-11-03 02:51:48,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1079 transitions. [2022-11-03 02:51:48,549 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1079 transitions. Word has length 92 [2022-11-03 02:51:48,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:48,550 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1079 transitions. [2022-11-03 02:51:48,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-03 02:51:48,550 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1079 transitions. [2022-11-03 02:51:48,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:51:48,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:48,552 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:48,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-03 02:51:48,552 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:48,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:48,552 INFO L85 PathProgramCache]: Analyzing trace with hash -303206901, now seen corresponding path program 1 times [2022-11-03 02:51:48,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:48,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707503533] [2022-11-03 02:51:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:48,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:51:48,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:48,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707503533] [2022-11-03 02:51:48,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707503533] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:48,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437475628] [2022-11-03 02:51:48,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:48,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:48,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:48,883 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:48,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:51:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:49,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:51:49,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:51:49,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:51:49,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437475628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:49,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1798310330] [2022-11-03 02:51:49,327 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-03 02:51:49,327 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:51:49,357 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:51:49,357 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:51:49,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:52:12,179 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 185 for LOIs [2022-11-03 02:52:15,740 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 02:52:15,750 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 103 for LOIs [2022-11-03 02:52:15,856 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 125 for LOIs [2022-11-03 02:52:16,227 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 103 for LOIs [2022-11-03 02:52:16,257 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:53:00,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1798310330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:00,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:53:00,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [8, 9, 9] total 61 [2022-11-03 02:53:00,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321168421] [2022-11-03 02:53:00,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:00,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 02:53:00,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:00,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 02:53:00,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=3341, Unknown=0, NotChecked=0, Total=3660 [2022-11-03 02:53:00,172 INFO L87 Difference]: Start difference. First operand 863 states and 1079 transitions. Second operand has 50 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 35 states have internal predecessors, (55), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-03 02:53:35,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:35,296 INFO L93 Difference]: Finished difference Result 1481 states and 1897 transitions. [2022-11-03 02:53:35,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-03 02:53:35,296 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 35 states have internal predecessors, (55), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 94 [2022-11-03 02:53:35,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:35,300 INFO L225 Difference]: With dead ends: 1481 [2022-11-03 02:53:35,300 INFO L226 Difference]: Without dead ends: 928 [2022-11-03 02:53:35,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 222 SyntacticMatches, 10 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 67.6s TimeCoverageRelationStatistics Valid=634, Invalid=6008, Unknown=0, NotChecked=0, Total=6642 [2022-11-03 02:53:35,302 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 408 mSDsluCounter, 5031 mSDsCounter, 0 mSdLazyCounter, 4669 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 5303 SdHoareTripleChecker+Invalid, 4874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 4669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:35,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 5303 Invalid, 4874 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [205 Valid, 4669 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2022-11-03 02:53:35,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-11-03 02:53:35,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 863. [2022-11-03 02:53:35,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 637 states have (on average 1.2448979591836735) internal successors, (793), 643 states have internal predecessors, (793), 143 states have call successors, (143), 82 states have call predecessors, (143), 82 states have return successors, (143), 137 states have call predecessors, (143), 143 states have call successors, (143) [2022-11-03 02:53:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1079 transitions. [2022-11-03 02:53:35,562 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1079 transitions. Word has length 94 [2022-11-03 02:53:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:35,563 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1079 transitions. [2022-11-03 02:53:35,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 35 states have internal predecessors, (55), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-03 02:53:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1079 transitions. [2022-11-03 02:53:35,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 02:53:35,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:35,565 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:35,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:35,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-03 02:53:35,779 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:35,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:35,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1271417128, now seen corresponding path program 1 times [2022-11-03 02:53:35,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:35,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722035849] [2022-11-03 02:53:35,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:35,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:53:36,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:36,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722035849] [2022-11-03 02:53:36,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722035849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:53:36,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035078438] [2022-11-03 02:53:36,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:36,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:36,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:36,129 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:36,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:53:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:36,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:53:36,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:53:36,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:53:36,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035078438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:36,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1039590591] [2022-11-03 02:53:36,580 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2022-11-03 02:53:36,580 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:53:36,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:53:36,580 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:53:36,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:53:57,498 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 185 for LOIs [2022-11-03 02:54:00,454 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 02:54:00,462 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 103 for LOIs [2022-11-03 02:54:00,569 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 125 for LOIs [2022-11-03 02:54:00,876 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 103 for LOIs [2022-11-03 02:54:00,907 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:54:46,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1039590591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:46,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:54:46,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [8, 9, 9] total 61 [2022-11-03 02:54:46,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055970400] [2022-11-03 02:54:46,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:46,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 02:54:46,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:54:46,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 02:54:46,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=3341, Unknown=0, NotChecked=0, Total=3660 [2022-11-03 02:54:46,041 INFO L87 Difference]: Start difference. First operand 863 states and 1079 transitions. Second operand has 50 states, 43 states have (on average 1.372093023255814) internal successors, (59), 35 states have internal predecessors, (59), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-03 02:55:21,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:21,440 INFO L93 Difference]: Finished difference Result 1471 states and 1880 transitions. [2022-11-03 02:55:21,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-03 02:55:21,440 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 43 states have (on average 1.372093023255814) internal successors, (59), 35 states have internal predecessors, (59), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 98 [2022-11-03 02:55:21,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:21,446 INFO L225 Difference]: With dead ends: 1471 [2022-11-03 02:55:21,446 INFO L226 Difference]: Without dead ends: 918 [2022-11-03 02:55:21,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 230 SyntacticMatches, 14 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 68.5s TimeCoverageRelationStatistics Valid=634, Invalid=6008, Unknown=0, NotChecked=0, Total=6642 [2022-11-03 02:55:21,447 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 259 mSDsluCounter, 5820 mSDsCounter, 0 mSdLazyCounter, 5207 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 6086 SdHoareTripleChecker+Invalid, 5361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 5207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:21,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 6086 Invalid, 5361 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [154 Valid, 5207 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2022-11-03 02:55:21,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-11-03 02:55:21,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 850. [2022-11-03 02:55:21,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 628 states have (on average 1.2420382165605095) internal successors, (780), 634 states have internal predecessors, (780), 139 states have call successors, (139), 82 states have call predecessors, (139), 82 states have return successors, (139), 133 states have call predecessors, (139), 139 states have call successors, (139) [2022-11-03 02:55:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1058 transitions. [2022-11-03 02:55:21,697 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1058 transitions. Word has length 98 [2022-11-03 02:55:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:21,698 INFO L495 AbstractCegarLoop]: Abstraction has 850 states and 1058 transitions. [2022-11-03 02:55:21,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 43 states have (on average 1.372093023255814) internal successors, (59), 35 states have internal predecessors, (59), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-03 02:55:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1058 transitions. [2022-11-03 02:55:21,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:55:21,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:21,700 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:21,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:21,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-03 02:55:21,927 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:21,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:21,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1569401407, now seen corresponding path program 1 times [2022-11-03 02:55:21,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:55:21,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6934570] [2022-11-03 02:55:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:21,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:55:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 02:55:22,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:55:22,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6934570] [2022-11-03 02:55:22,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6934570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:55:22,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:55:22,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:55:22,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592662463] [2022-11-03 02:55:22,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:55:22,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:55:22,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:55:22,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:55:22,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:55:22,122 INFO L87 Difference]: Start difference. First operand 850 states and 1058 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 02:55:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:22,399 INFO L93 Difference]: Finished difference Result 1404 states and 1777 transitions. [2022-11-03 02:55:22,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:55:22,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 108 [2022-11-03 02:55:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:22,404 INFO L225 Difference]: With dead ends: 1404 [2022-11-03 02:55:22,404 INFO L226 Difference]: Without dead ends: 838 [2022-11-03 02:55:22,406 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 02:55:22,406 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 7 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:22,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 553 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:55:22,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-11-03 02:55:22,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 788. [2022-11-03 02:55:22,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 586 states have (on average 1.2081911262798635) internal successors, (708), 592 states have internal predecessors, (708), 125 states have call successors, (125), 76 states have call predecessors, (125), 76 states have return successors, (125), 119 states have call predecessors, (125), 125 states have call successors, (125) [2022-11-03 02:55:22,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 958 transitions. [2022-11-03 02:55:22,705 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 958 transitions. Word has length 108 [2022-11-03 02:55:22,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:22,708 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 958 transitions. [2022-11-03 02:55:22,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 02:55:22,708 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 958 transitions. [2022-11-03 02:55:22,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 02:55:22,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:22,712 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:22,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-03 02:55:22,713 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:22,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:22,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1216163432, now seen corresponding path program 1 times [2022-11-03 02:55:22,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:55:22,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913443465] [2022-11-03 02:55:22,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:22,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:55:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 02:55:22,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:55:22,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913443465] [2022-11-03 02:55:22,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913443465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:55:22,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:55:22,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:55:22,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495948474] [2022-11-03 02:55:22,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:55:22,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:55:22,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:55:22,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:55:22,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:55:22,892 INFO L87 Difference]: Start difference. First operand 788 states and 958 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-03 02:55:23,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:23,206 INFO L93 Difference]: Finished difference Result 1247 states and 1548 transitions. [2022-11-03 02:55:23,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:55:23,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 124 [2022-11-03 02:55:23,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:23,210 INFO L225 Difference]: With dead ends: 1247 [2022-11-03 02:55:23,210 INFO L226 Difference]: Without dead ends: 776 [2022-11-03 02:55:23,212 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 02:55:23,212 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 6 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:23,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 544 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:55:23,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-11-03 02:55:23,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 752. [2022-11-03 02:55:23,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 560 states have (on average 1.1857142857142857) internal successors, (664), 566 states have internal predecessors, (664), 118 states have call successors, (118), 73 states have call predecessors, (118), 73 states have return successors, (118), 112 states have call predecessors, (118), 118 states have call successors, (118) [2022-11-03 02:55:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 900 transitions. [2022-11-03 02:55:23,388 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 900 transitions. Word has length 124 [2022-11-03 02:55:23,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:23,388 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 900 transitions. [2022-11-03 02:55:23,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-03 02:55:23,389 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 900 transitions. [2022-11-03 02:55:23,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:55:23,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:23,391 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:23,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-03 02:55:23,392 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:23,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:23,392 INFO L85 PathProgramCache]: Analyzing trace with hash -658884447, now seen corresponding path program 1 times [2022-11-03 02:55:23,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:55:23,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5914106] [2022-11-03 02:55:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:23,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:55:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-03 02:55:23,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:55:23,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5914106] [2022-11-03 02:55:23,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5914106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:55:23,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278541052] [2022-11-03 02:55:23,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:23,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:55:23,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:55:23,783 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:55:23,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ee63ee-2358-4952-a802-baaae2231aca/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:55:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:55:23,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:55:23,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 69 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 02:55:24,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-03 02:55:24,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278541052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:24,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1803514594] [2022-11-03 02:55:24,263 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2022-11-03 02:55:24,266 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:55:24,266 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:55:24,266 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:55:24,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:55:30,018 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 74 for LOIs [2022-11-03 02:55:30,117 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2022-11-03 02:55:30,125 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 104 for LOIs [2022-11-03 02:55:30,259 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 108 for LOIs [2022-11-03 02:55:30,282 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 117 for LOIs [2022-11-03 02:55:30,646 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 116 for LOIs [2022-11-03 02:55:30,996 INFO L180 IcfgInterpreter]: Interpretation finished