./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.2.prop1-func-interl.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/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_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.2.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/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 64bit --witnessprinter.graph.data.programhash 3cedfd7b65a397dcc569b6f7dcdf20a0979c0a004d2a9b42e86e386badf2347e --- 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 03:39:17,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:39:17,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:39:17,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:39:17,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:39:17,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:39:17,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:39:17,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:39:17,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:39:17,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:39:17,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:39:17,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:39:17,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:39:17,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:39:17,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:39:17,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:39:17,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:39:17,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:39:17,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:39:17,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:39:17,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:39:17,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:39:17,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:39:17,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:39:17,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:39:17,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:39:17,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:39:17,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:39:17,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:39:17,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:39:17,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:39:17,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:39:17,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:39:17,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:39:17,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:39:17,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:39:17,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:39:17,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:39:17,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:39:17,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:39:17,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:39:17,181 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:39:17,221 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:39:17,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:39:17,222 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:39:17,222 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:39:17,223 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:39:17,224 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:39:17,224 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:39:17,224 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:39:17,225 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:39:17,225 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:39:17,226 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:39:17,227 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:39:17,227 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:39:17,227 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:39:17,228 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:39:17,228 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:39:17,228 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:39:17,228 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:39:17,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:39:17,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:39:17,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:39:17,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:39:17,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:39:17,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:39:17,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:39:17,233 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:39:17,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:39:17,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:39:17,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:39:17,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:39:17,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:39:17,236 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:39:17,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:39:17,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:39:17,237 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:39:17,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:39:17,237 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:39:17,238 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:39:17,238 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_04f813df-e9c2-4aaf-9070-06748284ffc1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3cedfd7b65a397dcc569b6f7dcdf20a0979c0a004d2a9b42e86e386badf2347e [2022-11-03 03:39:17,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:39:17,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:39:17,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:39:17,627 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:39:17,628 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:39:17,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.2.prop1-func-interl.c [2022-11-03 03:39:17,729 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/data/1f94bce45/07bc24df68684966b39f0a9c40cdd906/FLAG0bfe8473b [2022-11-03 03:39:18,616 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:39:18,617 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.2.prop1-func-interl.c [2022-11-03 03:39:18,644 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/data/1f94bce45/07bc24df68684966b39f0a9c40cdd906/FLAG0bfe8473b [2022-11-03 03:39:18,672 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/data/1f94bce45/07bc24df68684966b39f0a9c40cdd906 [2022-11-03 03:39:18,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:39:18,678 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:39:18,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:39:18,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:39:18,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:39:18,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:39:18" (1/1) ... [2022-11-03 03:39:18,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@da31d5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:18, skipping insertion in model container [2022-11-03 03:39:18,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:39:18" (1/1) ... [2022-11-03 03:39:18,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:39:18,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:39:19,114 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_04f813df-e9c2-4aaf-9070-06748284ffc1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.2.prop1-func-interl.c[1014,1027] [2022-11-03 03:39:19,727 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:39:19,730 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:39:19,755 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_04f813df-e9c2-4aaf-9070-06748284ffc1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.2.prop1-func-interl.c[1014,1027] [2022-11-03 03:39:20,040 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:39:20,054 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:39:20,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:20 WrapperNode [2022-11-03 03:39:20,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:39:20,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:39:20,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:39:20,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:39:20,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:20" (1/1) ... [2022-11-03 03:39:20,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:20" (1/1) ... [2022-11-03 03:39:20,703 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3998 [2022-11-03 03:39:20,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:39:20,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:39:20,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:39:20,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:39:20,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:20" (1/1) ... [2022-11-03 03:39:20,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:20" (1/1) ... [2022-11-03 03:39:20,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:20" (1/1) ... [2022-11-03 03:39:20,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:20" (1/1) ... [2022-11-03 03:39:21,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:20" (1/1) ... [2022-11-03 03:39:21,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:20" (1/1) ... [2022-11-03 03:39:21,185 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:20" (1/1) ... [2022-11-03 03:39:21,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:20" (1/1) ... [2022-11-03 03:39:21,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:39:21,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:39:21,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:39:21,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:39:21,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:20" (1/1) ... [2022-11-03 03:39:21,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:39:21,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:39:21,507 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:39:21,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:39:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:39:21,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:39:22,393 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:39:22,395 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:46:43,253 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:47:26,784 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:47:26,784 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:47:26,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:47:26 BoogieIcfgContainer [2022-11-03 03:47:26,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:47:26,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:47:26,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:47:26,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:47:26,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:39:18" (1/3) ... [2022-11-03 03:47:26,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71912db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:47:26, skipping insertion in model container [2022-11-03 03:47:26,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:39:20" (2/3) ... [2022-11-03 03:47:26,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71912db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:47:26, skipping insertion in model container [2022-11-03 03:47:26,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:47:26" (3/3) ... [2022-11-03 03:47:26,800 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.szymanski.2.prop1-func-interl.c [2022-11-03 03:47:26,821 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:47:26,821 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:47:26,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:47:26,907 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;@22975024, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:47:26,912 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:47:26,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:26,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:47:26,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:26,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:47:26,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:26,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:26,930 INFO L85 PathProgramCache]: Analyzing trace with hash 20064848, now seen corresponding path program 1 times [2022-11-03 03:47:26,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:26,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361199248] [2022-11-03 03:47:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:26,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:47:27,744 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 03:47:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:47:28,458 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 03:47:28,461 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 03:47:28,463 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:47:28,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:47:28,469 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 03:47:28,474 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:47:28,529 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 03:47:28,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:47:28 BoogieIcfgContainer [2022-11-03 03:47:28,552 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:47:28,552 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:47:28,553 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:47:28,553 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:47:28,553 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:47:26" (3/4) ... [2022-11-03 03:47:28,557 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 03:47:28,557 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 03:47:28,558 INFO L158 Benchmark]: Toolchain (without parser) took 489879.50ms. Allocated memory was 94.4MB in the beginning and 5.1GB in the end (delta: 5.0GB). Free memory was 53.3MB in the beginning and 2.5GB in the end (delta: -2.5GB). Peak memory consumption was 2.5GB. Max. memory is 16.1GB. [2022-11-03 03:47:28,559 INFO L158 Benchmark]: CDTParser took 10.23ms. Allocated memory is still 94.4MB. Free memory was 65.9MB in the beginning and 75.1MB in the end (delta: -9.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 03:47:28,560 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1369.59ms. Allocated memory was 94.4MB in the beginning and 132.1MB in the end (delta: 37.7MB). Free memory was 53.2MB in the beginning and 61.0MB in the end (delta: -7.8MB). Peak memory consumption was 45.2MB. Max. memory is 16.1GB. [2022-11-03 03:47:28,561 INFO L158 Benchmark]: Boogie Procedure Inliner took 648.02ms. Allocated memory was 132.1MB in the beginning and 209.7MB in the end (delta: 77.6MB). Free memory was 61.0MB in the beginning and 93.6MB in the end (delta: -32.6MB). Peak memory consumption was 72.7MB. Max. memory is 16.1GB. [2022-11-03 03:47:28,561 INFO L158 Benchmark]: Boogie Preprocessor took 726.91ms. Allocated memory was 209.7MB in the beginning and 419.4MB in the end (delta: 209.7MB). Free memory was 93.6MB in the beginning and 287.9MB in the end (delta: -194.3MB). Peak memory consumption was 41.7MB. Max. memory is 16.1GB. [2022-11-03 03:47:28,562 INFO L158 Benchmark]: RCFGBuilder took 485354.52ms. Allocated memory was 419.4MB in the beginning and 5.1GB in the end (delta: 4.7GB). Free memory was 287.9MB in the beginning and 2.7GB in the end (delta: -2.4GB). Peak memory consumption was 2.5GB. Max. memory is 16.1GB. [2022-11-03 03:47:28,563 INFO L158 Benchmark]: TraceAbstraction took 1762.80ms. Allocated memory is still 5.1GB. Free memory was 2.7GB in the beginning and 2.5GB in the end (delta: 159.4MB). Peak memory consumption was 159.4MB. Max. memory is 16.1GB. [2022-11-03 03:47:28,563 INFO L158 Benchmark]: Witness Printer took 4.62ms. Allocated memory is still 5.1GB. Free memory was 2.5GB in the beginning and 2.5GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:47:28,567 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 10.23ms. Allocated memory is still 94.4MB. Free memory was 65.9MB in the beginning and 75.1MB in the end (delta: -9.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1369.59ms. Allocated memory was 94.4MB in the beginning and 132.1MB in the end (delta: 37.7MB). Free memory was 53.2MB in the beginning and 61.0MB in the end (delta: -7.8MB). Peak memory consumption was 45.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 648.02ms. Allocated memory was 132.1MB in the beginning and 209.7MB in the end (delta: 77.6MB). Free memory was 61.0MB in the beginning and 93.6MB in the end (delta: -32.6MB). Peak memory consumption was 72.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 726.91ms. Allocated memory was 209.7MB in the beginning and 419.4MB in the end (delta: 209.7MB). Free memory was 93.6MB in the beginning and 287.9MB in the end (delta: -194.3MB). Peak memory consumption was 41.7MB. Max. memory is 16.1GB. * RCFGBuilder took 485354.52ms. Allocated memory was 419.4MB in the beginning and 5.1GB in the end (delta: 4.7GB). Free memory was 287.9MB in the beginning and 2.7GB in the end (delta: -2.4GB). Peak memory consumption was 2.5GB. Max. memory is 16.1GB. * TraceAbstraction took 1762.80ms. Allocated memory is still 5.1GB. Free memory was 2.7GB in the beginning and 2.5GB in the end (delta: 159.4MB). Peak memory consumption was 159.4MB. Max. memory is 16.1GB. * Witness Printer took 4.62ms. Allocated memory is still 5.1GB. Free memory was 2.5GB in the beginning and 2.5GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 425, overapproximation of bitwiseAnd at line 282. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 8); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (8 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 24); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (24 - 1); [L34] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L35] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L37] const SORT_2 var_5 = 0; [L38] const SORT_1 var_30 = 0; [L39] const SORT_4 var_111 = 1; [L40] const SORT_4 var_112 = 0; [L41] const SORT_2 var_122 = 0; [L42] const SORT_2 var_124 = 1; [L43] const SORT_3 var_181 = 0; [L44] const SORT_4 var_428 = 3; [L45] const SORT_2 var_439 = 3; [L46] const SORT_2 var_704 = 2; [L47] const SORT_4 var_713 = 2; [L49] SORT_1 input_121; [L50] SORT_1 input_123; [L51] SORT_1 input_128; [L52] SORT_1 input_129; [L53] SORT_1 input_133; [L54] SORT_1 input_134; [L55] SORT_1 input_138; [L56] SORT_1 input_139; [L57] SORT_1 input_144; [L58] SORT_1 input_145; [L59] SORT_1 input_150; [L60] SORT_1 input_151; [L61] SORT_1 input_156; [L62] SORT_1 input_157; [L63] SORT_1 input_158; [L64] SORT_1 input_164; [L65] SORT_1 input_165; [L66] SORT_1 input_166; [L67] SORT_1 input_172; [L68] SORT_1 input_173; [L69] SORT_1 input_174; [L70] SORT_1 input_180; [L71] SORT_1 input_185; [L72] SORT_1 input_186; [L73] SORT_1 input_187; [L74] SORT_1 input_188; [L75] SORT_1 input_189; [L76] SORT_1 input_190; [L77] SORT_1 input_191; [L78] SORT_1 input_192; [L79] SORT_1 input_206; [L80] SORT_1 input_210; [L81] SORT_1 input_211; [L82] SORT_1 input_212; [L83] SORT_1 input_213; [L84] SORT_1 input_214; [L85] SORT_1 input_215; [L86] SORT_1 input_216; [L87] SORT_1 input_217; [L88] SORT_1 input_231; [L89] SORT_1 input_235; [L90] SORT_1 input_236; [L91] SORT_1 input_237; [L92] SORT_1 input_238; [L93] SORT_1 input_239; [L94] SORT_1 input_240; [L95] SORT_1 input_241; [L96] SORT_1 input_242; [L97] SORT_1 input_260; [L98] SORT_1 input_270; [L99] SORT_1 input_274; [L100] SORT_1 input_278; [L101] SORT_1 input_287; [L102] SORT_1 input_293; [L103] SORT_1 input_298; [L104] SORT_1 input_307; [L105] SORT_1 input_317; [L106] SORT_1 input_327; [L107] SORT_1 input_331; [L108] SORT_1 input_335; [L109] SORT_1 input_344; [L110] SORT_1 input_350; [L111] SORT_1 input_355; [L112] SORT_1 input_364; [L113] SORT_1 input_374; [L114] SORT_1 input_384; [L115] SORT_1 input_388; [L116] SORT_1 input_392; [L117] SORT_1 input_401; [L118] SORT_1 input_407; [L119] SORT_1 input_412; [L120] SORT_1 input_421; [L122] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L123] SORT_2 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L124] SORT_2 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L125] SORT_2 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L126] SORT_2 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L127] SORT_2 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L128] SORT_2 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L129] SORT_2 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L130] SORT_2 state_22 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L131] SORT_2 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L132] SORT_2 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L133] SORT_2 state_28 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L134] SORT_1 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L135] SORT_1 state_33 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L136] SORT_1 state_35 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L137] SORT_1 state_37 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L138] SORT_1 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L139] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L140] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L141] SORT_1 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L142] SORT_1 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L143] SORT_1 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L144] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L145] SORT_1 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L146] SORT_1 state_55 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L147] SORT_1 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L148] SORT_1 state_59 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L149] SORT_1 state_61 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L150] SORT_1 state_63 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L151] SORT_1 state_65 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L152] SORT_1 state_67 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L153] SORT_1 state_69 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L154] SORT_1 state_71 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L155] SORT_1 state_73 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L156] SORT_1 state_75 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L157] SORT_1 state_77 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L158] SORT_1 state_79 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L159] SORT_1 state_81 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L160] SORT_1 state_83 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L161] SORT_1 state_85 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L162] SORT_1 state_87 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L163] SORT_1 state_89 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L164] SORT_1 state_91 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L165] SORT_1 state_93 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L166] SORT_1 state_95 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L167] SORT_1 state_97 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L168] SORT_1 state_99 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L169] SORT_1 state_101 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L170] SORT_1 state_103 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L171] SORT_1 state_105 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L172] SORT_1 state_107 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L173] SORT_1 state_109 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L175] SORT_2 init_7_arg_1 = var_5; [L176] state_6 = init_7_arg_1 [L177] SORT_2 init_9_arg_1 = var_5; [L178] state_8 = init_9_arg_1 [L179] SORT_2 init_11_arg_1 = var_5; [L180] state_10 = init_11_arg_1 [L181] SORT_2 init_13_arg_1 = var_5; [L182] state_12 = init_13_arg_1 [L183] SORT_2 init_15_arg_1 = var_5; [L184] state_14 = init_15_arg_1 [L185] SORT_2 init_17_arg_1 = var_5; [L186] state_16 = init_17_arg_1 [L187] SORT_2 init_19_arg_1 = var_5; [L188] state_18 = init_19_arg_1 [L189] SORT_2 init_21_arg_1 = var_5; [L190] state_20 = init_21_arg_1 [L191] SORT_2 init_23_arg_1 = var_5; [L192] state_22 = init_23_arg_1 [L193] SORT_2 init_25_arg_1 = var_5; [L194] state_24 = init_25_arg_1 [L195] SORT_2 init_27_arg_1 = var_5; [L196] state_26 = init_27_arg_1 [L197] SORT_2 init_29_arg_1 = var_5; [L198] state_28 = init_29_arg_1 [L199] SORT_1 init_32_arg_1 = var_30; [L200] state_31 = init_32_arg_1 [L201] SORT_1 init_34_arg_1 = var_30; [L202] state_33 = init_34_arg_1 [L203] SORT_1 init_36_arg_1 = var_30; [L204] state_35 = init_36_arg_1 [L205] SORT_1 init_38_arg_1 = var_30; [L206] state_37 = init_38_arg_1 [L207] SORT_1 init_40_arg_1 = var_30; [L208] state_39 = init_40_arg_1 [L209] SORT_1 init_42_arg_1 = var_30; [L210] state_41 = init_42_arg_1 [L211] SORT_1 init_44_arg_1 = var_30; [L212] state_43 = init_44_arg_1 [L213] SORT_1 init_46_arg_1 = var_30; [L214] state_45 = init_46_arg_1 [L215] SORT_1 init_48_arg_1 = var_30; [L216] state_47 = init_48_arg_1 [L217] SORT_1 init_50_arg_1 = var_30; [L218] state_49 = init_50_arg_1 [L219] SORT_1 init_52_arg_1 = var_30; [L220] state_51 = init_52_arg_1 [L221] SORT_1 init_54_arg_1 = var_30; [L222] state_53 = init_54_arg_1 [L223] SORT_1 init_56_arg_1 = var_30; [L224] state_55 = init_56_arg_1 [L225] SORT_1 init_58_arg_1 = var_30; [L226] state_57 = init_58_arg_1 [L227] SORT_1 init_60_arg_1 = var_30; [L228] state_59 = init_60_arg_1 [L229] SORT_1 init_62_arg_1 = var_30; [L230] state_61 = init_62_arg_1 [L231] SORT_1 init_64_arg_1 = var_30; [L232] state_63 = init_64_arg_1 [L233] SORT_1 init_66_arg_1 = var_30; [L234] state_65 = init_66_arg_1 [L235] SORT_1 init_68_arg_1 = var_30; [L236] state_67 = init_68_arg_1 [L237] SORT_1 init_70_arg_1 = var_30; [L238] state_69 = init_70_arg_1 [L239] SORT_1 init_72_arg_1 = var_30; [L240] state_71 = init_72_arg_1 [L241] SORT_1 init_74_arg_1 = var_30; [L242] state_73 = init_74_arg_1 [L243] SORT_1 init_76_arg_1 = var_30; [L244] state_75 = init_76_arg_1 [L245] SORT_1 init_78_arg_1 = var_30; [L246] state_77 = init_78_arg_1 [L247] SORT_1 init_80_arg_1 = var_30; [L248] state_79 = init_80_arg_1 [L249] SORT_1 init_82_arg_1 = var_30; [L250] state_81 = init_82_arg_1 [L251] SORT_1 init_84_arg_1 = var_30; [L252] state_83 = init_84_arg_1 [L253] SORT_1 init_86_arg_1 = var_30; [L254] state_85 = init_86_arg_1 [L255] SORT_1 init_88_arg_1 = var_30; [L256] state_87 = init_88_arg_1 [L257] SORT_1 init_90_arg_1 = var_30; [L258] state_89 = init_90_arg_1 [L259] SORT_1 init_92_arg_1 = var_30; [L260] state_91 = init_92_arg_1 [L261] SORT_1 init_94_arg_1 = var_30; [L262] state_93 = init_94_arg_1 [L263] SORT_1 init_96_arg_1 = var_30; [L264] state_95 = init_96_arg_1 [L265] SORT_1 init_98_arg_1 = var_30; [L266] state_97 = init_98_arg_1 [L267] SORT_1 init_100_arg_1 = var_30; [L268] state_99 = init_100_arg_1 [L269] SORT_1 init_102_arg_1 = var_30; [L270] state_101 = init_102_arg_1 [L271] SORT_1 init_104_arg_1 = var_30; [L272] state_103 = init_104_arg_1 [L273] SORT_1 init_106_arg_1 = var_30; [L274] state_105 = init_106_arg_1 [L275] SORT_1 init_108_arg_1 = var_30; [L276] state_107 = init_108_arg_1 [L277] SORT_1 init_110_arg_1 = var_30; [L278] state_109 = init_110_arg_1 VAL [init_100_arg_1=0, init_102_arg_1=0, init_104_arg_1=0, init_106_arg_1=0, init_108_arg_1=0, init_110_arg_1=0, init_11_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_27_arg_1=0, init_29_arg_1=0, init_32_arg_1=0, init_34_arg_1=0, init_36_arg_1=0, init_38_arg_1=0, init_40_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_46_arg_1=0, init_48_arg_1=0, init_50_arg_1=0, init_52_arg_1=0, init_54_arg_1=0, init_56_arg_1=0, init_58_arg_1=0, init_60_arg_1=0, init_62_arg_1=0, init_64_arg_1=0, init_66_arg_1=0, init_68_arg_1=0, init_70_arg_1=0, init_72_arg_1=0, init_74_arg_1=0, init_76_arg_1=0, init_78_arg_1=0, init_7_arg_1=0, init_80_arg_1=0, init_82_arg_1=0, init_84_arg_1=0, init_86_arg_1=0, init_88_arg_1=0, init_90_arg_1=0, init_92_arg_1=0, init_94_arg_1=0, init_96_arg_1=0, init_98_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=255, mask_SORT_3=4294967295, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=128, msb_SORT_3=8388608, msb_SORT_4=2147483648, state_10=0, state_101=0, state_103=0, state_105=0, state_107=0, state_109=0, state_12=0, state_14=0, state_16=0, state_18=0, state_20=0, state_22=0, state_24=0, state_26=0, state_28=0, state_31=0, state_33=0, state_35=0, state_37=0, state_39=0, state_41=0, state_43=0, state_45=0, state_47=0, state_49=0, state_51=0, state_53=0, state_55=0, state_57=0, state_59=0, state_6=0, state_61=0, state_63=0, state_65=0, state_67=0, state_69=0, state_71=0, state_73=0, state_75=0, state_77=0, state_79=0, state_8=0, state_81=0, state_83=0, state_85=0, state_87=0, state_89=0, state_91=0, state_93=0, state_95=0, state_97=0, state_99=0, var_111=1, var_112=0, var_122=0, var_124=1, var_181=0, var_30=0, var_428=3, var_439=3, var_5=0, var_704=2, var_713=2] [L281] input_121 = __VERIFIER_nondet_uchar() [L282] input_121 = input_121 & mask_SORT_1 [L283] input_123 = __VERIFIER_nondet_uchar() [L284] input_123 = input_123 & mask_SORT_1 [L285] input_128 = __VERIFIER_nondet_uchar() [L286] input_128 = input_128 & mask_SORT_1 [L287] input_129 = __VERIFIER_nondet_uchar() [L288] input_129 = input_129 & mask_SORT_1 [L289] input_133 = __VERIFIER_nondet_uchar() [L290] input_133 = input_133 & mask_SORT_1 [L291] input_134 = __VERIFIER_nondet_uchar() [L292] input_134 = input_134 & mask_SORT_1 [L293] input_138 = __VERIFIER_nondet_uchar() [L294] input_138 = input_138 & mask_SORT_1 [L295] input_139 = __VERIFIER_nondet_uchar() [L296] input_139 = input_139 & mask_SORT_1 [L297] input_144 = __VERIFIER_nondet_uchar() [L298] input_144 = input_144 & mask_SORT_1 [L299] input_145 = __VERIFIER_nondet_uchar() [L300] input_145 = input_145 & mask_SORT_1 [L301] input_150 = __VERIFIER_nondet_uchar() [L302] input_150 = input_150 & mask_SORT_1 [L303] input_151 = __VERIFIER_nondet_uchar() [L304] input_151 = input_151 & mask_SORT_1 [L305] input_156 = __VERIFIER_nondet_uchar() [L306] input_156 = input_156 & mask_SORT_1 [L307] input_157 = __VERIFIER_nondet_uchar() [L308] input_157 = input_157 & mask_SORT_1 [L309] input_158 = __VERIFIER_nondet_uchar() [L310] input_158 = input_158 & mask_SORT_1 [L311] input_164 = __VERIFIER_nondet_uchar() [L312] input_164 = input_164 & mask_SORT_1 [L313] input_165 = __VERIFIER_nondet_uchar() [L314] input_165 = input_165 & mask_SORT_1 [L315] input_166 = __VERIFIER_nondet_uchar() [L316] input_166 = input_166 & mask_SORT_1 [L317] input_172 = __VERIFIER_nondet_uchar() [L318] input_172 = input_172 & mask_SORT_1 [L319] input_173 = __VERIFIER_nondet_uchar() [L320] input_173 = input_173 & mask_SORT_1 [L321] input_174 = __VERIFIER_nondet_uchar() [L322] input_174 = input_174 & mask_SORT_1 [L323] input_180 = __VERIFIER_nondet_uchar() [L324] input_180 = input_180 & mask_SORT_1 [L325] input_185 = __VERIFIER_nondet_uchar() [L326] input_185 = input_185 & mask_SORT_1 [L327] input_186 = __VERIFIER_nondet_uchar() [L328] input_186 = input_186 & mask_SORT_1 [L329] input_187 = __VERIFIER_nondet_uchar() [L330] input_187 = input_187 & mask_SORT_1 [L331] input_188 = __VERIFIER_nondet_uchar() [L332] input_188 = input_188 & mask_SORT_1 [L333] input_189 = __VERIFIER_nondet_uchar() [L334] input_189 = input_189 & mask_SORT_1 [L335] input_190 = __VERIFIER_nondet_uchar() [L336] input_190 = input_190 & mask_SORT_1 [L337] input_191 = __VERIFIER_nondet_uchar() [L338] input_191 = input_191 & mask_SORT_1 [L339] input_192 = __VERIFIER_nondet_uchar() [L340] input_192 = input_192 & mask_SORT_1 [L341] input_206 = __VERIFIER_nondet_uchar() [L342] input_206 = input_206 & mask_SORT_1 [L343] input_210 = __VERIFIER_nondet_uchar() [L344] input_210 = input_210 & mask_SORT_1 [L345] input_211 = __VERIFIER_nondet_uchar() [L346] input_211 = input_211 & mask_SORT_1 [L347] input_212 = __VERIFIER_nondet_uchar() [L348] input_212 = input_212 & mask_SORT_1 [L349] input_213 = __VERIFIER_nondet_uchar() [L350] input_213 = input_213 & mask_SORT_1 [L351] input_214 = __VERIFIER_nondet_uchar() [L352] input_214 = input_214 & mask_SORT_1 [L353] input_215 = __VERIFIER_nondet_uchar() [L354] input_215 = input_215 & mask_SORT_1 [L355] input_216 = __VERIFIER_nondet_uchar() [L356] input_216 = input_216 & mask_SORT_1 [L357] input_217 = __VERIFIER_nondet_uchar() [L358] input_217 = input_217 & mask_SORT_1 [L359] input_231 = __VERIFIER_nondet_uchar() [L360] input_231 = input_231 & mask_SORT_1 [L361] input_235 = __VERIFIER_nondet_uchar() [L362] input_235 = input_235 & mask_SORT_1 [L363] input_236 = __VERIFIER_nondet_uchar() [L364] input_236 = input_236 & mask_SORT_1 [L365] input_237 = __VERIFIER_nondet_uchar() [L366] input_237 = input_237 & mask_SORT_1 [L367] input_238 = __VERIFIER_nondet_uchar() [L368] input_238 = input_238 & mask_SORT_1 [L369] input_239 = __VERIFIER_nondet_uchar() [L370] input_239 = input_239 & mask_SORT_1 [L371] input_240 = __VERIFIER_nondet_uchar() [L372] input_240 = input_240 & mask_SORT_1 [L373] input_241 = __VERIFIER_nondet_uchar() [L374] input_241 = input_241 & mask_SORT_1 [L375] input_242 = __VERIFIER_nondet_uchar() [L376] input_242 = input_242 & mask_SORT_1 [L377] input_260 = __VERIFIER_nondet_uchar() [L378] input_270 = __VERIFIER_nondet_uchar() [L379] input_274 = __VERIFIER_nondet_uchar() [L380] input_278 = __VERIFIER_nondet_uchar() [L381] input_287 = __VERIFIER_nondet_uchar() [L382] input_293 = __VERIFIER_nondet_uchar() [L383] input_298 = __VERIFIER_nondet_uchar() [L384] input_307 = __VERIFIER_nondet_uchar() [L385] input_317 = __VERIFIER_nondet_uchar() [L386] input_327 = __VERIFIER_nondet_uchar() [L387] input_331 = __VERIFIER_nondet_uchar() [L388] input_335 = __VERIFIER_nondet_uchar() [L389] input_344 = __VERIFIER_nondet_uchar() [L390] input_350 = __VERIFIER_nondet_uchar() [L391] input_355 = __VERIFIER_nondet_uchar() [L392] input_364 = __VERIFIER_nondet_uchar() [L393] input_374 = __VERIFIER_nondet_uchar() [L394] input_384 = __VERIFIER_nondet_uchar() [L395] input_388 = __VERIFIER_nondet_uchar() [L396] input_392 = __VERIFIER_nondet_uchar() [L397] input_401 = __VERIFIER_nondet_uchar() [L398] input_407 = __VERIFIER_nondet_uchar() [L399] input_412 = __VERIFIER_nondet_uchar() [L400] input_421 = __VERIFIER_nondet_uchar() [L403] SORT_1 var_113_arg_0 = state_55; [L404] SORT_4 var_113_arg_1 = var_111; [L405] SORT_4 var_113_arg_2 = var_112; [L406] EXPR var_113_arg_0 ? var_113_arg_1 : var_113_arg_2 [L406] SORT_4 var_113 = var_113_arg_0 ? var_113_arg_1 : var_113_arg_2; [L407] SORT_1 var_114_arg_0 = state_81; [L408] SORT_4 var_114_arg_1 = var_111; [L409] SORT_4 var_114_arg_2 = var_112; [L410] EXPR var_114_arg_0 ? var_114_arg_1 : var_114_arg_2 [L410] SORT_4 var_114 = var_114_arg_0 ? var_114_arg_1 : var_114_arg_2; [L411] SORT_4 var_115_arg_0 = var_113; [L412] SORT_4 var_115_arg_1 = var_114; [L413] SORT_4 var_115 = var_115_arg_0 + var_115_arg_1; [L414] SORT_1 var_116_arg_0 = state_107; [L415] SORT_4 var_116_arg_1 = var_111; [L416] SORT_4 var_116_arg_2 = var_112; [L417] EXPR var_116_arg_0 ? var_116_arg_1 : var_116_arg_2 [L417] SORT_4 var_116 = var_116_arg_0 ? var_116_arg_1 : var_116_arg_2; [L418] SORT_4 var_117_arg_0 = var_115; [L419] SORT_4 var_117_arg_1 = var_116; [L420] SORT_4 var_117 = var_117_arg_0 + var_117_arg_1; [L421] var_117 = var_117 & mask_SORT_4 [L422] SORT_4 var_118_arg_0 = var_117; [L423] SORT_4 var_118_arg_1 = var_111; [L424] SORT_1 var_118 = var_118_arg_0 <= var_118_arg_1; [L425] SORT_1 var_119_arg_0 = ~state_109; [L426] var_119_arg_0 = var_119_arg_0 & mask_SORT_1 [L427] SORT_1 var_119_arg_1 = ~var_118; [L428] var_119_arg_1 = var_119_arg_1 & mask_SORT_1 [L429] SORT_1 var_119 = var_119_arg_0 & var_119_arg_1; [L430] var_119 = var_119 & mask_SORT_1 [L431] SORT_1 bad_120_arg_0 = var_119; [L432] CALL __VERIFIER_assert(!(bad_120_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.6s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 03:47:28,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/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_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.2.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/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 64bit --witnessprinter.graph.data.programhash 3cedfd7b65a397dcc569b6f7dcdf20a0979c0a004d2a9b42e86e386badf2347e --- 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 03:47:31,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:47:31,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:47:31,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:47:31,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:47:31,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:47:31,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:47:31,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:47:31,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:47:31,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:47:31,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:47:31,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:47:31,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:47:31,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:47:31,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:47:31,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:47:31,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:47:31,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:47:31,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:47:31,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:47:31,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:47:31,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:47:31,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:47:31,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:47:31,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:47:31,262 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:47:31,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:47:31,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:47:31,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:47:31,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:47:31,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:47:31,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:47:31,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:47:31,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:47:31,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:47:31,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:47:31,273 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:47:31,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:47:31,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:47:31,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:47:31,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:47:31,277 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 03:47:31,319 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:47:31,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:47:31,320 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:47:31,321 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:47:31,321 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:47:31,322 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:47:31,322 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:47:31,322 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:47:31,322 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:47:31,323 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:47:31,324 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:47:31,324 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:47:31,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:47:31,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:47:31,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:47:31,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:47:31,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:47:31,326 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:47:31,326 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:47:31,327 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:47:31,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:47:31,327 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:47:31,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:47:31,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:47:31,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:47:31,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:47:31,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:47:31,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:47:31,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:47:31,329 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:47:31,329 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:47:31,329 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:47:31,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:47:31,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:47:31,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:47:31,330 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_04f813df-e9c2-4aaf-9070-06748284ffc1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3cedfd7b65a397dcc569b6f7dcdf20a0979c0a004d2a9b42e86e386badf2347e [2022-11-03 03:47:31,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:47:31,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:47:31,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:47:31,780 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:47:31,781 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:47:31,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.2.prop1-func-interl.c [2022-11-03 03:47:31,857 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/data/1f17632b9/0abda51aaa23494da12468226e07bf2d/FLAGecd836f6c [2022-11-03 03:47:32,631 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:47:32,632 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.2.prop1-func-interl.c [2022-11-03 03:47:32,653 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/data/1f17632b9/0abda51aaa23494da12468226e07bf2d/FLAGecd836f6c [2022-11-03 03:47:32,781 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/data/1f17632b9/0abda51aaa23494da12468226e07bf2d [2022-11-03 03:47:32,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:47:32,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:47:32,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:47:32,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:47:32,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:47:32,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:32" (1/1) ... [2022-11-03 03:47:32,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b35098e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:32, skipping insertion in model container [2022-11-03 03:47:32,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:32" (1/1) ... [2022-11-03 03:47:32,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:47:32,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:47:33,105 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_04f813df-e9c2-4aaf-9070-06748284ffc1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.2.prop1-func-interl.c[1014,1027] [2022-11-03 03:47:33,659 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:47:33,663 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:47:33,674 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_04f813df-e9c2-4aaf-9070-06748284ffc1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.2.prop1-func-interl.c[1014,1027] [2022-11-03 03:47:33,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:47:33,911 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:47:33,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:33 WrapperNode [2022-11-03 03:47:33,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:47:33,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:47:33,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:47:33,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:47:33,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:33" (1/1) ... [2022-11-03 03:47:34,016 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:33" (1/1) ... [2022-11-03 03:47:34,176 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3998 [2022-11-03 03:47:34,176 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:47:34,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:47:34,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:47:34,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:47:34,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:33" (1/1) ... [2022-11-03 03:47:34,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:33" (1/1) ... [2022-11-03 03:47:34,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:33" (1/1) ... [2022-11-03 03:47:34,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:33" (1/1) ... [2022-11-03 03:47:34,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:33" (1/1) ... [2022-11-03 03:47:34,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:33" (1/1) ... [2022-11-03 03:47:34,372 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:33" (1/1) ... [2022-11-03 03:47:34,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:33" (1/1) ... [2022-11-03 03:47:34,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:47:34,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:47:34,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:47:34,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:47:34,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:33" (1/1) ... [2022-11-03 03:47:34,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:47:34,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:34,462 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:47:34,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:47:34,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:47:34,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:47:35,349 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:47:35,351 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:47:38,994 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:47:39,007 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:47:39,008 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:47:39,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:47:39 BoogieIcfgContainer [2022-11-03 03:47:39,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:47:39,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:47:39,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:47:39,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:47:39,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:47:32" (1/3) ... [2022-11-03 03:47:39,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3656b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:47:39, skipping insertion in model container [2022-11-03 03:47:39,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:33" (2/3) ... [2022-11-03 03:47:39,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3656b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:47:39, skipping insertion in model container [2022-11-03 03:47:39,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:47:39" (3/3) ... [2022-11-03 03:47:39,021 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.szymanski.2.prop1-func-interl.c [2022-11-03 03:47:39,045 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:47:39,045 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:47:39,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:47:39,136 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;@48502c80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:47:39,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:47:39,142 INFO L276 IsEmpty]: Start isEmpty. Operand has 179 states, 177 states have (on average 1.497175141242938) internal successors, (265), 178 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:39,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:47:39,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:39,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:39,149 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:39,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:39,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1473645707, now seen corresponding path program 1 times [2022-11-03 03:47:39,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:39,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641462333] [2022-11-03 03:47:39,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:39,171 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:39,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:39,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:39,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:47:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:39,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:47:39,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:40,036 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 03:47:40,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:40,050 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:40,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641462333] [2022-11-03 03:47:40,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641462333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:40,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:40,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:47:40,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472274627] [2022-11-03 03:47:40,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:40,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:47:40,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:40,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:47:40,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:47:40,116 INFO L87 Difference]: Start difference. First operand has 179 states, 177 states have (on average 1.497175141242938) internal successors, (265), 178 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:40,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:40,615 INFO L93 Difference]: Finished difference Result 697 states and 1043 transitions. [2022-11-03 03:47:40,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:40,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 03:47:40,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:40,633 INFO L225 Difference]: With dead ends: 697 [2022-11-03 03:47:40,633 INFO L226 Difference]: Without dead ends: 520 [2022-11-03 03:47:40,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 03:47:40,640 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 763 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:40,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 1015 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:47:40,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-11-03 03:47:40,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 177. [2022-11-03 03:47:40,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:40,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 261 transitions. [2022-11-03 03:47:40,715 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 261 transitions. Word has length 11 [2022-11-03 03:47:40,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:40,716 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 261 transitions. [2022-11-03 03:47:40,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:40,716 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 261 transitions. [2022-11-03 03:47:40,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:47:40,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:40,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:40,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 03:47:40,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:40,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:40,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:40,931 INFO L85 PathProgramCache]: Analyzing trace with hash 2011974963, now seen corresponding path program 1 times [2022-11-03 03:47:40,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:40,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872880180] [2022-11-03 03:47:40,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:40,932 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:40,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:40,933 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:40,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:47:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:41,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:47:41,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:41,681 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 03:47:41,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:41,681 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:41,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872880180] [2022-11-03 03:47:41,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872880180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:41,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:41,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:47:41,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672329040] [2022-11-03 03:47:41,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:41,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:47:41,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:41,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:47:41,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:47:41,692 INFO L87 Difference]: Start difference. First operand 177 states and 261 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:42,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:42,092 INFO L93 Difference]: Finished difference Result 693 states and 1027 transitions. [2022-11-03 03:47:42,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:42,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 03:47:42,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:42,098 INFO L225 Difference]: With dead ends: 693 [2022-11-03 03:47:42,098 INFO L226 Difference]: Without dead ends: 520 [2022-11-03 03:47:42,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 03:47:42,100 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 757 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:42,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 1014 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:47:42,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-11-03 03:47:42,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 179. [2022-11-03 03:47:42,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.4775280898876404) internal successors, (263), 178 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:42,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 263 transitions. [2022-11-03 03:47:42,124 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 263 transitions. Word has length 11 [2022-11-03 03:47:42,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:42,124 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 263 transitions. [2022-11-03 03:47:42,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:42,125 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 263 transitions. [2022-11-03 03:47:42,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:47:42,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:42,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:42,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:42,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:42,330 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:42,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:42,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2069233265, now seen corresponding path program 1 times [2022-11-03 03:47:42,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:42,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331296299] [2022-11-03 03:47:42,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:42,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:42,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:42,333 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:42,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:47:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:43,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:47:43,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:43,107 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 03:47:43,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:43,107 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:43,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331296299] [2022-11-03 03:47:43,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331296299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:43,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:43,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:47:43,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021823083] [2022-11-03 03:47:43,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:43,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:47:43,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:43,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:47:43,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:47:43,117 INFO L87 Difference]: Start difference. First operand 179 states and 263 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:43,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:43,426 INFO L93 Difference]: Finished difference Result 693 states and 1026 transitions. [2022-11-03 03:47:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:43,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 03:47:43,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:43,437 INFO L225 Difference]: With dead ends: 693 [2022-11-03 03:47:43,437 INFO L226 Difference]: Without dead ends: 520 [2022-11-03 03:47:43,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 03:47:43,439 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 751 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:43,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [751 Valid, 1016 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:47:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-11-03 03:47:43,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 181. [2022-11-03 03:47:43,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.4722222222222223) internal successors, (265), 180 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:43,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-11-03 03:47:43,460 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 11 [2022-11-03 03:47:43,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:43,461 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-11-03 03:47:43,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:43,461 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-11-03 03:47:43,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:47:43,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:43,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:43,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:43,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:43,680 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:43,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:43,681 INFO L85 PathProgramCache]: Analyzing trace with hash 2069292847, now seen corresponding path program 1 times [2022-11-03 03:47:43,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:43,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685003460] [2022-11-03 03:47:43,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:43,682 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:43,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:43,683 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:43,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:47:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:44,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 03:47:44,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:44,800 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 03:47:44,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:44,800 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:44,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685003460] [2022-11-03 03:47:44,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685003460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:44,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:44,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:47:44,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537992876] [2022-11-03 03:47:44,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:44,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:47:44,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:44,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:47:44,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:47:44,804 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:46,822 INFO L93 Difference]: Finished difference Result 717 states and 1057 transitions. [2022-11-03 03:47:46,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:47:46,824 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 03:47:46,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:46,826 INFO L225 Difference]: With dead ends: 717 [2022-11-03 03:47:46,827 INFO L226 Difference]: Without dead ends: 715 [2022-11-03 03:47:46,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:47:46,828 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 2278 mSDsluCounter, 2180 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2278 SdHoareTripleChecker+Valid, 2431 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:46,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2278 Valid, 2431 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 03:47:46,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-11-03 03:47:46,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 187. [2022-11-03 03:47:46,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.467741935483871) internal successors, (273), 186 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 273 transitions. [2022-11-03 03:47:46,841 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 273 transitions. Word has length 11 [2022-11-03 03:47:46,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:46,841 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 273 transitions. [2022-11-03 03:47:46,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:46,842 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 273 transitions. [2022-11-03 03:47:46,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:46,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:46,848 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:47:46,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:47,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:47,062 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:47,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:47,062 INFO L85 PathProgramCache]: Analyzing trace with hash -465634823, now seen corresponding path program 1 times [2022-11-03 03:47:47,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:47,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073248209] [2022-11-03 03:47:47,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:47,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:47,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:47,070 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:47,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:47:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:48,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:47:48,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:48,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:48,960 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:48,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073248209] [2022-11-03 03:47:48,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073248209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:48,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:48,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:47:48,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596423067] [2022-11-03 03:47:48,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:48,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:47:48,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:48,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:47:48,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:48,970 INFO L87 Difference]: Start difference. First operand 187 states and 273 transitions. Second operand has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:49,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:49,422 INFO L93 Difference]: Finished difference Result 710 states and 1048 transitions. [2022-11-03 03:47:49,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:47:49,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:47:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:49,425 INFO L225 Difference]: With dead ends: 710 [2022-11-03 03:47:49,425 INFO L226 Difference]: Without dead ends: 531 [2022-11-03 03:47:49,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:47:49,427 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 910 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:49,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 1609 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2022-11-03 03:47:49,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-11-03 03:47:49,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 215. [2022-11-03 03:47:49,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.4626168224299065) internal successors, (313), 214 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 313 transitions. [2022-11-03 03:47:49,444 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 313 transitions. Word has length 182 [2022-11-03 03:47:49,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:49,446 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 313 transitions. [2022-11-03 03:47:49,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:49,447 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 313 transitions. [2022-11-03 03:47:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:49,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:49,463 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:47:49,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:49,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:49,683 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:49,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:49,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1465490811, now seen corresponding path program 1 times [2022-11-03 03:47:49,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:49,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041968554] [2022-11-03 03:47:49,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:49,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:49,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:49,688 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:49,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:47:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:51,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:47:51,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:51,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:51,611 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:51,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041968554] [2022-11-03 03:47:51,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041968554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:51,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:51,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:47:51,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307330093] [2022-11-03 03:47:51,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:51,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:47:51,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:51,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:47:51,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:51,614 INFO L87 Difference]: Start difference. First operand 215 states and 313 transitions. Second operand has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:51,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:51,910 INFO L93 Difference]: Finished difference Result 428 states and 628 transitions. [2022-11-03 03:47:51,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:47:51,915 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:47:51,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:51,916 INFO L225 Difference]: With dead ends: 428 [2022-11-03 03:47:51,916 INFO L226 Difference]: Without dead ends: 249 [2022-11-03 03:47:51,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:47:51,918 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 53 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:51,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1278 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 15 Unchecked, 0.3s Time] [2022-11-03 03:47:51,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-03 03:47:51,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-11-03 03:47:51,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.4596774193548387) internal successors, (362), 248 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:51,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 362 transitions. [2022-11-03 03:47:51,926 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 362 transitions. Word has length 182 [2022-11-03 03:47:51,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:51,927 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 362 transitions. [2022-11-03 03:47:51,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:51,927 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 362 transitions. [2022-11-03 03:47:51,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:51,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:51,930 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:47:51,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-03 03:47:52,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:52,146 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:52,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:52,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1881424519, now seen corresponding path program 1 times [2022-11-03 03:47:52,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:52,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175108296] [2022-11-03 03:47:52,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:52,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:52,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:52,150 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:52,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:47:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:53,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:47:53,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:53,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:53,989 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:53,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175108296] [2022-11-03 03:47:53,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175108296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:53,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:53,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:47:53,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676353806] [2022-11-03 03:47:53,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:53,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:47:53,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:53,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:47:53,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:53,991 INFO L87 Difference]: Start difference. First operand 249 states and 362 transitions. Second operand has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:54,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:54,445 INFO L93 Difference]: Finished difference Result 760 states and 1119 transitions. [2022-11-03 03:47:54,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:47:54,446 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:47:54,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:54,448 INFO L225 Difference]: With dead ends: 760 [2022-11-03 03:47:54,448 INFO L226 Difference]: Without dead ends: 581 [2022-11-03 03:47:54,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:47:54,449 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 818 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:54,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 1643 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 20 Unchecked, 0.4s Time] [2022-11-03 03:47:54,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-11-03 03:47:54,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 291. [2022-11-03 03:47:54,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.4586206896551723) internal successors, (423), 290 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:54,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 423 transitions. [2022-11-03 03:47:54,461 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 423 transitions. Word has length 182 [2022-11-03 03:47:54,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:54,461 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 423 transitions. [2022-11-03 03:47:54,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:54,462 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 423 transitions. [2022-11-03 03:47:54,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:54,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:54,464 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:47:54,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-11-03 03:47:54,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:54,685 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:54,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:54,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1393377413, now seen corresponding path program 1 times [2022-11-03 03:47:54,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:54,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511797865] [2022-11-03 03:47:54,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:54,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:54,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:54,689 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:54,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:47:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:56,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:47:56,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:56,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:56,834 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:56,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511797865] [2022-11-03 03:47:56,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511797865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:56,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:56,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:47:56,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122622233] [2022-11-03 03:47:56,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:56,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:47:56,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:56,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:47:56,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:56,837 INFO L87 Difference]: Start difference. First operand 291 states and 423 transitions. Second operand has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:57,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:57,120 INFO L93 Difference]: Finished difference Result 604 states and 884 transitions. [2022-11-03 03:47:57,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:47:57,122 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:47:57,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:57,124 INFO L225 Difference]: With dead ends: 604 [2022-11-03 03:47:57,124 INFO L226 Difference]: Without dead ends: 425 [2022-11-03 03:47:57,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:47:57,125 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 156 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:57,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 1276 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 21 Unchecked, 0.3s Time] [2022-11-03 03:47:57,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-11-03 03:47:57,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2022-11-03 03:47:57,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 1.4575471698113207) internal successors, (618), 424 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:57,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 618 transitions. [2022-11-03 03:47:57,136 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 618 transitions. Word has length 182 [2022-11-03 03:47:57,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:57,136 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 618 transitions. [2022-11-03 03:47:57,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:57,137 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 618 transitions. [2022-11-03 03:47:57,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:57,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:57,140 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:47:57,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:57,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:57,354 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:57,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:57,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1633617159, now seen corresponding path program 1 times [2022-11-03 03:47:57,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:57,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125089647] [2022-11-03 03:47:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:57,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:57,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:57,360 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:57,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:47:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:58,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:47:58,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:59,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:59,593 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:59,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125089647] [2022-11-03 03:47:59,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125089647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:59,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:59,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:47:59,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261906400] [2022-11-03 03:47:59,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:59,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:47:59,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:59,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:47:59,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:47:59,597 INFO L87 Difference]: Start difference. First operand 425 states and 618 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:00,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:00,181 INFO L93 Difference]: Finished difference Result 915 states and 1345 transitions. [2022-11-03 03:48:00,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:48:00,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:48:00,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:00,186 INFO L225 Difference]: With dead ends: 915 [2022-11-03 03:48:00,186 INFO L226 Difference]: Without dead ends: 736 [2022-11-03 03:48:00,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 03:48:00,187 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 422 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:00,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 953 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:48:00,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-11-03 03:48:00,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 523. [2022-11-03 03:48:00,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.4636015325670497) internal successors, (764), 522 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 764 transitions. [2022-11-03 03:48:00,205 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 764 transitions. Word has length 182 [2022-11-03 03:48:00,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:00,206 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 764 transitions. [2022-11-03 03:48:00,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:00,206 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 764 transitions. [2022-11-03 03:48:00,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:00,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:00,209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:48:00,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:00,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:00,432 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:00,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:00,433 INFO L85 PathProgramCache]: Analyzing trace with hash -740130821, now seen corresponding path program 1 times [2022-11-03 03:48:00,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:00,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207685008] [2022-11-03 03:48:00,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:00,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:00,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:00,442 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:00,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:48:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:01,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:48:01,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:02,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:02,680 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:02,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207685008] [2022-11-03 03:48:02,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207685008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:02,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:02,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:02,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119852477] [2022-11-03 03:48:02,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:02,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:02,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:02,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:02,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:02,684 INFO L87 Difference]: Start difference. First operand 523 states and 764 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:03,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:03,287 INFO L93 Difference]: Finished difference Result 1058 states and 1555 transitions. [2022-11-03 03:48:03,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:03,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:48:03,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:03,297 INFO L225 Difference]: With dead ends: 1058 [2022-11-03 03:48:03,297 INFO L226 Difference]: Without dead ends: 879 [2022-11-03 03:48:03,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:48:03,298 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 868 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:03,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [868 Valid, 1441 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:48:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-11-03 03:48:03,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 527. [2022-11-03 03:48:03,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 1.461977186311787) internal successors, (769), 526 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 769 transitions. [2022-11-03 03:48:03,314 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 769 transitions. Word has length 182 [2022-11-03 03:48:03,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:03,315 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 769 transitions. [2022-11-03 03:48:03,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:03,315 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 769 transitions. [2022-11-03 03:48:03,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:03,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:03,318 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:48:03,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:03,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:03,542 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:03,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:03,542 INFO L85 PathProgramCache]: Analyzing trace with hash -316484099, now seen corresponding path program 1 times [2022-11-03 03:48:03,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:03,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [33847633] [2022-11-03 03:48:03,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:03,546 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:03,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:03,548 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:03,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:48:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:05,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:48:05,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:05,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:05,761 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:05,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [33847633] [2022-11-03 03:48:05,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [33847633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:05,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:05,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:05,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143356641] [2022-11-03 03:48:05,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:05,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:05,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:05,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:05,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:05,763 INFO L87 Difference]: Start difference. First operand 527 states and 769 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:06,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:06,309 INFO L93 Difference]: Finished difference Result 1058 states and 1554 transitions. [2022-11-03 03:48:06,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:06,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:48:06,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:06,314 INFO L225 Difference]: With dead ends: 1058 [2022-11-03 03:48:06,314 INFO L226 Difference]: Without dead ends: 879 [2022-11-03 03:48:06,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:48:06,315 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 856 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:06,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 1435 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:48:06,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-11-03 03:48:06,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 531. [2022-11-03 03:48:06,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.460377358490566) internal successors, (774), 530 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 774 transitions. [2022-11-03 03:48:06,330 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 774 transitions. Word has length 182 [2022-11-03 03:48:06,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:06,331 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 774 transitions. [2022-11-03 03:48:06,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:06,331 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 774 transitions. [2022-11-03 03:48:06,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:06,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:06,334 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:48:06,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:06,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:06,558 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:06,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:06,558 INFO L85 PathProgramCache]: Analyzing trace with hash 343047423, now seen corresponding path program 1 times [2022-11-03 03:48:06,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:06,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729651568] [2022-11-03 03:48:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:06,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:06,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:06,562 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:06,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:48:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:07,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:48:07,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:08,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:08,644 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:08,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729651568] [2022-11-03 03:48:08,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729651568] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:08,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:08,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:08,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817251971] [2022-11-03 03:48:08,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:08,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:08,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:08,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:08,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:08,647 INFO L87 Difference]: Start difference. First operand 531 states and 774 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:09,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:09,261 INFO L93 Difference]: Finished difference Result 1070 states and 1571 transitions. [2022-11-03 03:48:09,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:09,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:48:09,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:09,270 INFO L225 Difference]: With dead ends: 1070 [2022-11-03 03:48:09,270 INFO L226 Difference]: Without dead ends: 891 [2022-11-03 03:48:09,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:48:09,272 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 855 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:09,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 1434 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:48:09,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-11-03 03:48:09,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 539. [2022-11-03 03:48:09,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.4591078066914498) internal successors, (785), 538 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:09,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 785 transitions. [2022-11-03 03:48:09,286 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 785 transitions. Word has length 182 [2022-11-03 03:48:09,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:09,286 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 785 transitions. [2022-11-03 03:48:09,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:09,287 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 785 transitions. [2022-11-03 03:48:09,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:09,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:09,289 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:48:09,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:09,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:09,514 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:09,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:09,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1729250817, now seen corresponding path program 1 times [2022-11-03 03:48:09,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:09,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573803479] [2022-11-03 03:48:09,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:09,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:09,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:09,519 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:09,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:48:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:10,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:48:10,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:11,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:11,573 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:11,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573803479] [2022-11-03 03:48:11,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573803479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:11,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:11,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:11,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733353694] [2022-11-03 03:48:11,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:11,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:11,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:11,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:11,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:11,575 INFO L87 Difference]: Start difference. First operand 539 states and 785 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:12,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:12,131 INFO L93 Difference]: Finished difference Result 1070 states and 1570 transitions. [2022-11-03 03:48:12,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:12,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:48:12,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:12,136 INFO L225 Difference]: With dead ends: 1070 [2022-11-03 03:48:12,136 INFO L226 Difference]: Without dead ends: 891 [2022-11-03 03:48:12,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:48:12,138 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 843 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:12,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 1428 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:48:12,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-11-03 03:48:12,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 543. [2022-11-03 03:48:12,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 1.4575645756457565) internal successors, (790), 542 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:12,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 790 transitions. [2022-11-03 03:48:12,152 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 790 transitions. Word has length 182 [2022-11-03 03:48:12,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:12,152 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 790 transitions. [2022-11-03 03:48:12,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:12,153 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 790 transitions. [2022-11-03 03:48:12,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:12,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:12,155 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:48:12,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:12,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:12,370 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:12,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:12,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1869799427, now seen corresponding path program 1 times [2022-11-03 03:48:12,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:12,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790826103] [2022-11-03 03:48:12,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:12,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:12,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:12,375 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:12,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 03:48:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:13,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:48:13,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:14,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:14,487 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:14,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790826103] [2022-11-03 03:48:14,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790826103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:14,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:14,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:48:14,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480995941] [2022-11-03 03:48:14,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:14,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:48:14,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:14,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:48:14,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:48:14,489 INFO L87 Difference]: Start difference. First operand 543 states and 790 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:14,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:14,951 INFO L93 Difference]: Finished difference Result 915 states and 1340 transitions. [2022-11-03 03:48:14,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:48:14,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:48:14,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:14,954 INFO L225 Difference]: With dead ends: 915 [2022-11-03 03:48:14,954 INFO L226 Difference]: Without dead ends: 736 [2022-11-03 03:48:14,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 03:48:14,955 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 357 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:14,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 948 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:48:14,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-11-03 03:48:14,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 547. [2022-11-03 03:48:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.456043956043956) internal successors, (795), 546 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 795 transitions. [2022-11-03 03:48:14,982 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 795 transitions. Word has length 182 [2022-11-03 03:48:14,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:14,983 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 795 transitions. [2022-11-03 03:48:14,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:14,983 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 795 transitions. [2022-11-03 03:48:14,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:14,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:14,986 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:48:15,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:15,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:15,210 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:15,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2002466043, now seen corresponding path program 1 times [2022-11-03 03:48:15,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:15,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988123738] [2022-11-03 03:48:15,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:15,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:15,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:15,213 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:15,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 03:48:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:16,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:48:16,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:17,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:17,310 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:17,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988123738] [2022-11-03 03:48:17,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988123738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:17,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:17,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:17,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410603236] [2022-11-03 03:48:17,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:17,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:17,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:17,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:17,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:17,312 INFO L87 Difference]: Start difference. First operand 547 states and 795 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:17,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:17,822 INFO L93 Difference]: Finished difference Result 1082 states and 1586 transitions. [2022-11-03 03:48:17,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:17,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:48:17,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:17,824 INFO L225 Difference]: With dead ends: 1082 [2022-11-03 03:48:17,825 INFO L226 Difference]: Without dead ends: 903 [2022-11-03 03:48:17,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:48:17,826 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 839 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1430 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:17,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 1430 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:48:17,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-11-03 03:48:17,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 551. [2022-11-03 03:48:17,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 1.4545454545454546) internal successors, (800), 550 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 800 transitions. [2022-11-03 03:48:17,839 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 800 transitions. Word has length 182 [2022-11-03 03:48:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:17,840 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 800 transitions. [2022-11-03 03:48:17,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:17,841 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 800 transitions. [2022-11-03 03:48:17,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:17,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:17,843 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:48:17,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:18,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:18,062 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:18,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:18,062 INFO L85 PathProgramCache]: Analyzing trace with hash 704153351, now seen corresponding path program 1 times [2022-11-03 03:48:18,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:18,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555149713] [2022-11-03 03:48:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:18,064 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:18,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:18,065 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:18,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:48:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:19,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:48:19,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:20,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:20,083 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:20,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555149713] [2022-11-03 03:48:20,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555149713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:20,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:20,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:20,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095706120] [2022-11-03 03:48:20,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:20,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:20,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:20,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:20,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:20,085 INFO L87 Difference]: Start difference. First operand 551 states and 800 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:20,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:20,680 INFO L93 Difference]: Finished difference Result 910 states and 1331 transitions. [2022-11-03 03:48:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:20,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:48:20,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:20,684 INFO L225 Difference]: With dead ends: 910 [2022-11-03 03:48:20,684 INFO L226 Difference]: Without dead ends: 731 [2022-11-03 03:48:20,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:48:20,685 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 586 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:20,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 1091 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:48:20,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-11-03 03:48:20,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 553. [2022-11-03 03:48:20,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.4528985507246377) internal successors, (802), 552 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 802 transitions. [2022-11-03 03:48:20,697 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 802 transitions. Word has length 182 [2022-11-03 03:48:20,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:20,697 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 802 transitions. [2022-11-03 03:48:20,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 802 transitions. [2022-11-03 03:48:20,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:20,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:20,699 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:48:20,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:20,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:20,914 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:20,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:20,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1984017029, now seen corresponding path program 1 times [2022-11-03 03:48:20,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:20,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351478312] [2022-11-03 03:48:20,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:20,918 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:20,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:20,919 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:20,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 03:48:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:22,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:48:22,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:22,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:22,950 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:22,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351478312] [2022-11-03 03:48:22,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351478312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:22,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:22,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:22,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148877553] [2022-11-03 03:48:22,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:22,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:22,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:22,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:22,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:22,952 INFO L87 Difference]: Start difference. First operand 553 states and 802 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:23,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:23,457 INFO L93 Difference]: Finished difference Result 1082 states and 1584 transitions. [2022-11-03 03:48:23,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:23,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:48:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:23,462 INFO L225 Difference]: With dead ends: 1082 [2022-11-03 03:48:23,462 INFO L226 Difference]: Without dead ends: 903 [2022-11-03 03:48:23,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:48:23,463 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 825 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:23,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 1423 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:48:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-11-03 03:48:23,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 555. [2022-11-03 03:48:23,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.4512635379061372) internal successors, (804), 554 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:23,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 804 transitions. [2022-11-03 03:48:23,476 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 804 transitions. Word has length 182 [2022-11-03 03:48:23,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:23,476 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 804 transitions. [2022-11-03 03:48:23,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:23,477 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 804 transitions. [2022-11-03 03:48:23,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:23,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:23,478 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:48:23,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:23,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:23,702 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:23,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:23,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1397211015, now seen corresponding path program 1 times [2022-11-03 03:48:23,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:23,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4070735] [2022-11-03 03:48:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:23,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:23,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:23,705 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:23,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 03:48:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:25,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:48:25,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:26,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:27,448 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:27,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4070735] [2022-11-03 03:48:27,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4070735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:27,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2044617575] [2022-11-03 03:48:27,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:27,449 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:48:27,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:48:27,455 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:48:27,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 03:48:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:30,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:48:30,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:31,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:32,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2044617575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:32,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040440181] [2022-11-03 03:48:32,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:32,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:32,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:32,005 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:32,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 03:48:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:33,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:48:33,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:34,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:35,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040440181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:35,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:48:35,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 28 [2022-11-03 03:48:35,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691311140] [2022-11-03 03:48:35,737 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:48:35,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 03:48:35,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:35,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 03:48:35,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-11-03 03:48:35,739 INFO L87 Difference]: Start difference. First operand 555 states and 804 transitions. Second operand has 28 states, 28 states have (on average 25.25) internal successors, (707), 28 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:36,458 INFO L93 Difference]: Finished difference Result 972 states and 1409 transitions. [2022-11-03 03:48:36,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:48:36,459 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 25.25) internal successors, (707), 28 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:48:36,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:36,462 INFO L225 Difference]: With dead ends: 972 [2022-11-03 03:48:36,462 INFO L226 Difference]: Without dead ends: 793 [2022-11-03 03:48:36,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1100 GetRequests, 1060 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 03:48:36,463 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 1077 mSDsluCounter, 3327 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 3578 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:36,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1077 Valid, 3578 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2022-11-03 03:48:36,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-03 03:48:36,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 790. [2022-11-03 03:48:36,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 1.443599493029151) internal successors, (1139), 789 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:36,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1139 transitions. [2022-11-03 03:48:36,479 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1139 transitions. Word has length 182 [2022-11-03 03:48:36,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:36,480 INFO L495 AbstractCegarLoop]: Abstraction has 790 states and 1139 transitions. [2022-11-03 03:48:36,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 25.25) internal successors, (707), 28 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:36,481 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1139 transitions. [2022-11-03 03:48:36,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:36,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:36,482 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:48:36,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:36,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:36,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:37,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:48:37,098 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:37,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:37,099 INFO L85 PathProgramCache]: Analyzing trace with hash 587864389, now seen corresponding path program 1 times [2022-11-03 03:48:37,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:37,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549113301] [2022-11-03 03:48:37,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:37,102 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:37,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:37,102 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:37,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 03:48:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:38,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:48:38,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:39,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:40,508 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:40,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549113301] [2022-11-03 03:48:40,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549113301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:40,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1052295465] [2022-11-03 03:48:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:40,509 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:48:40,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:48:40,514 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:48:40,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-03 03:48:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:43,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:48:43,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:44,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:44,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1052295465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:44,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488140376] [2022-11-03 03:48:44,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:44,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:44,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:44,986 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:44,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-03 03:48:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:46,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:48:46,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:47,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:48,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488140376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:48,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:48:48,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 03:48:48,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646818192] [2022-11-03 03:48:48,103 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:48:48,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 03:48:48,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:48,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 03:48:48,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:48:48,106 INFO L87 Difference]: Start difference. First operand 790 states and 1139 transitions. Second operand has 16 states, 16 states have (on average 22.4375) internal successors, (359), 16 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:48,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:48,703 INFO L93 Difference]: Finished difference Result 1152 states and 1666 transitions. [2022-11-03 03:48:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:48:48,704 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.4375) internal successors, (359), 16 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:48:48,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:48,708 INFO L225 Difference]: With dead ends: 1152 [2022-11-03 03:48:48,708 INFO L226 Difference]: Without dead ends: 973 [2022-11-03 03:48:48,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1093 GetRequests, 1069 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:48:48,710 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 608 mSDsluCounter, 1979 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 2232 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:48,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 2232 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 32 Unchecked, 0.4s Time] [2022-11-03 03:48:48,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-11-03 03:48:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 973. [2022-11-03 03:48:48,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 972 states have (on average 1.4393004115226338) internal successors, (1399), 972 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:48,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1399 transitions. [2022-11-03 03:48:48,737 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1399 transitions. Word has length 182 [2022-11-03 03:48:48,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:48,737 INFO L495 AbstractCegarLoop]: Abstraction has 973 states and 1399 transitions. [2022-11-03 03:48:48,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.4375) internal successors, (359), 16 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:48,738 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1399 transitions. [2022-11-03 03:48:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:48,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:48,740 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:48:48,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:48,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-03 03:48:49,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:49,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:48:49,362 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:49,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:49,362 INFO L85 PathProgramCache]: Analyzing trace with hash 645122691, now seen corresponding path program 1 times [2022-11-03 03:48:49,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:49,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574030663] [2022-11-03 03:48:49,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:49,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:49,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:49,366 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:49,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 03:48:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:50,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:48:50,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:51,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:52,729 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:52,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574030663] [2022-11-03 03:48:52,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574030663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:52,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [235448256] [2022-11-03 03:48:52,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:52,730 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:48:52,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:48:52,731 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:48:52,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-03 03:48:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:55,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:48:55,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:56,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:57,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [235448256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:57,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523056096] [2022-11-03 03:48:57,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:57,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:57,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:57,141 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:57,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-03 03:48:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:58,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:48:58,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:59,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:00,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523056096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:00,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:49:00,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 03:49:00,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173568373] [2022-11-03 03:49:00,043 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:49:00,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 03:49:00,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:00,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 03:49:00,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:49:00,045 INFO L87 Difference]: Start difference. First operand 973 states and 1399 transitions. Second operand has 16 states, 16 states have (on average 22.5625) internal successors, (361), 16 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:00,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:00,535 INFO L93 Difference]: Finished difference Result 1617 states and 2327 transitions. [2022-11-03 03:49:00,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:49:00,535 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.5625) internal successors, (361), 16 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:49:00,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:00,538 INFO L225 Difference]: With dead ends: 1617 [2022-11-03 03:49:00,538 INFO L226 Difference]: Without dead ends: 1438 [2022-11-03 03:49:00,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1089 GetRequests, 1068 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:49:00,540 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 357 mSDsluCounter, 2156 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 2412 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:00,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 2412 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 65 Unchecked, 0.3s Time] [2022-11-03 03:49:00,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2022-11-03 03:49:00,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1438. [2022-11-03 03:49:00,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 1.4335421016005567) internal successors, (2060), 1437 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:00,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 2060 transitions. [2022-11-03 03:49:00,576 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 2060 transitions. Word has length 182 [2022-11-03 03:49:00,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:00,576 INFO L495 AbstractCegarLoop]: Abstraction has 1438 states and 2060 transitions. [2022-11-03 03:49:00,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.5625) internal successors, (361), 16 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:00,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 2060 transitions. [2022-11-03 03:49:00,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:49:00,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:00,580 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:49:00,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:00,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:01,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:01,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:49:01,194 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:01,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:01,194 INFO L85 PathProgramCache]: Analyzing trace with hash -637049595, now seen corresponding path program 1 times [2022-11-03 03:49:01,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:01,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170045856] [2022-11-03 03:49:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:01,197 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:01,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:01,198 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:01,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 03:49:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:02,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 03:49:02,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:04,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:49:04,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:49:09,603 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:09,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170045856] [2022-11-03 03:49:09,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170045856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:09,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [489012936] [2022-11-03 03:49:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:09,605 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:49:09,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:49:09,606 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:49:09,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-03 03:49:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:12,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 03:49:12,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:15,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:34,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [489012936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:34,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427436975] [2022-11-03 03:49:34,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:34,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:34,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:49:34,867 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:49:34,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-03 03:49:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:36,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 03:49:36,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:49:39,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:49:45,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427436975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:45,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:49:45,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 11, 11, 11] total 50 [2022-11-03 03:49:45,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558429574] [2022-11-03 03:49:45,602 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:49:45,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 03:49:45,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:45,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 03:49:45,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2192, Unknown=5, NotChecked=0, Total=2450 [2022-11-03 03:49:45,604 INFO L87 Difference]: Start difference. First operand 1438 states and 2060 transitions. Second operand has 50 states, 50 states have (on average 21.56) internal successors, (1078), 50 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:50,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:50,937 INFO L93 Difference]: Finished difference Result 2309 states and 3308 transitions. [2022-11-03 03:49:50,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 03:49:50,937 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 21.56) internal successors, (1078), 50 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:49:50,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:50,944 INFO L225 Difference]: With dead ends: 2309 [2022-11-03 03:49:50,945 INFO L226 Difference]: Without dead ends: 2307 [2022-11-03 03:49:50,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1116 GetRequests, 1047 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=591, Invalid=4374, Unknown=5, NotChecked=0, Total=4970 [2022-11-03 03:49:50,948 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 1014 mSDsluCounter, 7334 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 7570 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:50,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1014 Valid, 7570 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-11-03 03:49:50,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2022-11-03 03:49:50,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 2291. [2022-11-03 03:49:51,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.4353711790393013) internal successors, (3287), 2290 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3287 transitions. [2022-11-03 03:49:51,005 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3287 transitions. Word has length 182 [2022-11-03 03:49:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:51,005 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3287 transitions. [2022-11-03 03:49:51,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 21.56) internal successors, (1078), 50 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:51,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3287 transitions. [2022-11-03 03:49:51,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:49:51,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:51,010 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:49:51,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:51,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:51,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:51,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:51,638 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:51,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:51,638 INFO L85 PathProgramCache]: Analyzing trace with hash 962764999, now seen corresponding path program 1 times [2022-11-03 03:49:51,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:51,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479583062] [2022-11-03 03:49:51,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:51,641 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:51,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:51,642 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:51,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 03:49:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:53,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:49:53,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:54,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:54,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:55,497 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:55,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1479583062] [2022-11-03 03:49:55,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1479583062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:55,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [740389569] [2022-11-03 03:49:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:55,498 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:49:55,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:49:55,499 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:49:55,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 03:49:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:58,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:49:58,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:59,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:00,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [740389569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:00,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228613495] [2022-11-03 03:50:00,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:00,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:50:00,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:50:00,193 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:50:00,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-03 03:50:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:01,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:50:01,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:02,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:03,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228613495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:03,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:50:03,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 03:50:03,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729265357] [2022-11-03 03:50:03,571 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:50:03,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 03:50:03,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:03,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 03:50:03,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:50:03,573 INFO L87 Difference]: Start difference. First operand 2291 states and 3287 transitions. Second operand has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:04,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:04,133 INFO L93 Difference]: Finished difference Result 2804 states and 4029 transitions. [2022-11-03 03:50:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 03:50:04,136 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:50:04,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:04,141 INFO L225 Difference]: With dead ends: 2804 [2022-11-03 03:50:04,141 INFO L226 Difference]: Without dead ends: 2621 [2022-11-03 03:50:04,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 1068 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:50:04,143 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 501 mSDsluCounter, 2090 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:04,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 2341 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-11-03 03:50:04,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2022-11-03 03:50:04,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2621. [2022-11-03 03:50:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2621 states, 2620 states have (on average 1.4339694656488549) internal successors, (3757), 2620 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:04,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2621 states to 2621 states and 3757 transitions. [2022-11-03 03:50:04,206 INFO L78 Accepts]: Start accepts. Automaton has 2621 states and 3757 transitions. Word has length 182 [2022-11-03 03:50:04,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:04,207 INFO L495 AbstractCegarLoop]: Abstraction has 2621 states and 3757 transitions. [2022-11-03 03:50:04,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:04,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2621 states and 3757 transitions. [2022-11-03 03:50:04,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:50:04,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:04,212 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:50:04,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:04,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:04,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:04,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:50:04,830 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:04,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:04,830 INFO L85 PathProgramCache]: Analyzing trace with hash 153418373, now seen corresponding path program 1 times [2022-11-03 03:50:04,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:04,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887026874] [2022-11-03 03:50:04,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:04,833 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:04,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:04,834 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:04,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 03:50:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:06,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 03:50:06,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:08,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:13,627 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:13,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887026874] [2022-11-03 03:50:13,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887026874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:13,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [820121121] [2022-11-03 03:50:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:13,628 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:13,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:50:13,630 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:50:13,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 03:50:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:16,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 03:50:16,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:18,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:26,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [820121121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:26,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538940808] [2022-11-03 03:50:26,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:26,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:50:26,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:50:26,166 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:50:26,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-03 03:50:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:27,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 03:50:27,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:30,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:35,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538940808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:35,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:50:35,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8, 8, 11, 11] total 44 [2022-11-03 03:50:35,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586302067] [2022-11-03 03:50:35,846 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:50:35,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 03:50:35,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:35,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 03:50:35,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1702, Unknown=1, NotChecked=0, Total=1892 [2022-11-03 03:50:35,849 INFO L87 Difference]: Start difference. First operand 2621 states and 3757 transitions. Second operand has 44 states, 44 states have (on average 24.5) internal successors, (1078), 44 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:37,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:37,747 INFO L93 Difference]: Finished difference Result 3110 states and 4474 transitions. [2022-11-03 03:50:37,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 03:50:37,748 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 24.5) internal successors, (1078), 44 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:50:37,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:37,754 INFO L225 Difference]: With dead ends: 3110 [2022-11-03 03:50:37,754 INFO L226 Difference]: Without dead ends: 3108 [2022-11-03 03:50:37,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1114 GetRequests, 1053 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=454, Invalid=3451, Unknown=1, NotChecked=0, Total=3906 [2022-11-03 03:50:37,756 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 1279 mSDsluCounter, 6525 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 6847 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:37,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1279 Valid, 6847 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 155 Unchecked, 0.1s Time] [2022-11-03 03:50:37,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3108 states. [2022-11-03 03:50:37,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3108 to 2969. [2022-11-03 03:50:37,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2969 states, 2968 states have (on average 1.4410377358490567) internal successors, (4277), 2968 states have internal predecessors, (4277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:37,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2969 states to 2969 states and 4277 transitions. [2022-11-03 03:50:37,829 INFO L78 Accepts]: Start accepts. Automaton has 2969 states and 4277 transitions. Word has length 182 [2022-11-03 03:50:37,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:37,830 INFO L495 AbstractCegarLoop]: Abstraction has 2969 states and 4277 transitions. [2022-11-03 03:50:37,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 24.5) internal successors, (1078), 44 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:37,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2969 states and 4277 transitions. [2022-11-03 03:50:37,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:50:37,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:37,835 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:50:37,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:38,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-03 03:50:38,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:38,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:50:38,450 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:38,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:38,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1128813495, now seen corresponding path program 1 times [2022-11-03 03:50:38,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:38,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068824387] [2022-11-03 03:50:38,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:38,453 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:38,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:38,454 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:38,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 03:50:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:39,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 03:50:39,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:42,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:52,888 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:52,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068824387] [2022-11-03 03:50:52,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068824387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:52,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [301269401] [2022-11-03 03:50:52,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:52,888 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:52,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:50:52,889 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:50:52,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-03 03:50:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:55,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 03:50:55,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:57,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:01,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [301269401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:01,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517290723] [2022-11-03 03:51:01,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:01,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:01,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:01,639 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:51:01,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-03 03:51:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:02,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 03:51:02,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:09,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:28,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517290723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:28,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:51:28,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 10] total 27 [2022-11-03 03:51:28,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856849252] [2022-11-03 03:51:28,215 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:51:28,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 03:51:28,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:28,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 03:51:28,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=604, Unknown=10, NotChecked=0, Total=702 [2022-11-03 03:51:28,218 INFO L87 Difference]: Start difference. First operand 2969 states and 4277 transitions. Second operand has 27 states, 27 states have (on average 26.59259259259259) internal successors, (718), 27 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:37,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:37,574 INFO L93 Difference]: Finished difference Result 5185 states and 7438 transitions. [2022-11-03 03:51:37,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:51:37,575 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 26.59259259259259) internal successors, (718), 27 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:51:37,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:37,588 INFO L225 Difference]: With dead ends: 5185 [2022-11-03 03:51:37,588 INFO L226 Difference]: Without dead ends: 5183 [2022-11-03 03:51:37,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1102 GetRequests, 1061 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=199, Invalid=1119, Unknown=14, NotChecked=0, Total=1332 [2022-11-03 03:51:37,590 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 1100 mSDsluCounter, 4492 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 4734 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:37,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1100 Valid, 4734 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2022-11-03 03:51:37,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5183 states. [2022-11-03 03:51:37,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5183 to 3897. [2022-11-03 03:51:37,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3897 states, 3896 states have (on average 1.4391683778234086) internal successors, (5607), 3896 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3897 states to 3897 states and 5607 transitions. [2022-11-03 03:51:37,697 INFO L78 Accepts]: Start accepts. Automaton has 3897 states and 5607 transitions. Word has length 182 [2022-11-03 03:51:37,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:37,697 INFO L495 AbstractCegarLoop]: Abstraction has 3897 states and 5607 transitions. [2022-11-03 03:51:37,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 26.59259259259259) internal successors, (718), 27 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:37,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3897 states and 5607 transitions. [2022-11-03 03:51:37,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:51:37,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:37,704 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:51:37,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-11-03 03:51:37,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:38,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-03 03:51:38,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:38,319 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:38,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:38,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1128753913, now seen corresponding path program 1 times [2022-11-03 03:51:38,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:38,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341768141] [2022-11-03 03:51:38,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:38,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:38,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:38,323 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:38,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 03:51:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:39,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 03:51:39,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:51:42,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:51:47,802 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:47,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341768141] [2022-11-03 03:51:47,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341768141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:47,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1485542783] [2022-11-03 03:51:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:47,803 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:47,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:47,803 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:47,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-03 03:51:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:50,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 03:51:50,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:53,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:05,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1485542783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:05,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424201600] [2022-11-03 03:52:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:05,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:05,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:05,269 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:52:05,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-03 03:52:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:06,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 03:52:06,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:52:09,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:52:15,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424201600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:15,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:52:15,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 11, 11] total 46 [2022-11-03 03:52:15,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254768759] [2022-11-03 03:52:15,127 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:52:15,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-03 03:52:15,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:15,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-03 03:52:15,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1874, Unknown=2, NotChecked=0, Total=2070 [2022-11-03 03:52:15,130 INFO L87 Difference]: Start difference. First operand 3897 states and 5607 transitions. Second operand has 46 states, 46 states have (on average 23.434782608695652) internal successors, (1078), 46 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:19,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:19,799 INFO L93 Difference]: Finished difference Result 5988 states and 8618 transitions. [2022-11-03 03:52:19,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-03 03:52:19,800 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 23.434782608695652) internal successors, (1078), 46 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:52:19,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:19,817 INFO L225 Difference]: With dead ends: 5988 [2022-11-03 03:52:19,817 INFO L226 Difference]: Without dead ends: 5986 [2022-11-03 03:52:19,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1118 GetRequests, 1051 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=500, Invalid=4190, Unknown=2, NotChecked=0, Total=4692 [2022-11-03 03:52:19,819 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 1452 mSDsluCounter, 8971 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 9291 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:19,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1452 Valid, 9291 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 172 Unchecked, 0.1s Time] [2022-11-03 03:52:19,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2022-11-03 03:52:19,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 4255. [2022-11-03 03:52:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4255 states, 4254 states have (on average 1.4381758345086977) internal successors, (6118), 4254 states have internal predecessors, (6118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:19,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4255 states to 4255 states and 6118 transitions. [2022-11-03 03:52:19,955 INFO L78 Accepts]: Start accepts. Automaton has 4255 states and 6118 transitions. Word has length 182 [2022-11-03 03:52:19,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:19,955 INFO L495 AbstractCegarLoop]: Abstraction has 4255 states and 6118 transitions. [2022-11-03 03:52:19,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 23.434782608695652) internal successors, (1078), 46 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:19,956 INFO L276 IsEmpty]: Start isEmpty. Operand 4255 states and 6118 transitions. [2022-11-03 03:52:19,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:52:19,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:19,962 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:52:20,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:20,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:20,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:20,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:20,586 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:20,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:20,586 INFO L85 PathProgramCache]: Analyzing trace with hash 768165963, now seen corresponding path program 1 times [2022-11-03 03:52:20,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:20,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2104143068] [2022-11-03 03:52:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:20,589 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:20,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:20,590 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:20,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 03:52:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:21,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:52:21,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:22,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:52:22,296 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:22,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2104143068] [2022-11-03 03:52:22,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2104143068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:22,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:52:22,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:52:22,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065889695] [2022-11-03 03:52:22,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:22,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:52:22,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:22,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:52:22,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:52:22,298 INFO L87 Difference]: Start difference. First operand 4255 states and 6118 transitions. Second operand has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:22,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:22,995 INFO L93 Difference]: Finished difference Result 7248 states and 10273 transitions. [2022-11-03 03:52:22,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:52:22,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:52:22,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:23,003 INFO L225 Difference]: With dead ends: 7248 [2022-11-03 03:52:23,003 INFO L226 Difference]: Without dead ends: 5969 [2022-11-03 03:52:23,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:52:23,007 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 287 mSDsluCounter, 1744 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 2262 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:23,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 2262 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 16 Unchecked, 0.6s Time] [2022-11-03 03:52:23,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5969 states. [2022-11-03 03:52:23,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5969 to 4879. [2022-11-03 03:52:23,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4879 states, 4878 states have (on average 1.4423944239442394) internal successors, (7036), 4878 states have internal predecessors, (7036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4879 states to 4879 states and 7036 transitions. [2022-11-03 03:52:23,125 INFO L78 Accepts]: Start accepts. Automaton has 4879 states and 7036 transitions. Word has length 182 [2022-11-03 03:52:23,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:23,126 INFO L495 AbstractCegarLoop]: Abstraction has 4879 states and 7036 transitions. [2022-11-03 03:52:23,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 4879 states and 7036 transitions. [2022-11-03 03:52:23,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:52:23,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:23,133 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:52:23,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:23,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:52:23,354 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:23,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:23,354 INFO L85 PathProgramCache]: Analyzing trace with hash -2140015923, now seen corresponding path program 1 times [2022-11-03 03:52:23,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:23,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142340753] [2022-11-03 03:52:23,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:23,356 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:23,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:23,357 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:23,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 03:52:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:24,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 03:52:24,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:27,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:51,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:51,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142340753] [2022-11-03 03:52:51,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142340753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:51,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2140083042] [2022-11-03 03:52:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:51,277 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:51,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:51,278 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:51,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04f813df-e9c2-4aaf-9070-06748284ffc1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-03 03:52:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:54,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 3416 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 03:52:54,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:56,728 INFO L328 TraceCheckSpWp]: Computing backward predicates...