./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.3.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_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/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_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.3.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/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_886902f8-6782-4b8b-806a-317734063ccb/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 2c894e1d7fb4f29f2261c2da9b84160dfd404379400898d35a0af0a1a91c3f60 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:05:36,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:05:36,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:05:36,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:05:36,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:05:36,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:05:36,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:05:36,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:05:36,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:05:36,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:05:36,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:05:36,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:05:36,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:05:36,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:05:36,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:05:36,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:05:36,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:05:36,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:05:36,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:05:36,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:05:36,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:05:36,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:05:36,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:05:36,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:05:36,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:05:36,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:05:36,109 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:05:36,110 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:05:36,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:05:36,112 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:05:36,112 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:05:36,113 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:05:36,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:05:36,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:05:36,116 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:05:36,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:05:36,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:05:36,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:05:36,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:05:36,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:05:36,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:05:36,122 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:05:36,147 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:05:36,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:05:36,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:05:36,149 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:05:36,149 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:05:36,150 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:05:36,150 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:05:36,151 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:05:36,151 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:05:36,151 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:05:36,152 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:05:36,152 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:05:36,152 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:05:36,153 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:05:36,153 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:05:36,153 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:05:36,154 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:05:36,154 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:05:36,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:05:36,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:05:36,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:05:36,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:05:36,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:05:36,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:05:36,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:05:36,157 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:05:36,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:05:36,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:05:36,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:05:36,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:05:36,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:05:36,160 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:05:36,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:05:36,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:05:36,161 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:05:36,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:05:36,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:05:36,162 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:05:36,162 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_886902f8-6782-4b8b-806a-317734063ccb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c894e1d7fb4f29f2261c2da9b84160dfd404379400898d35a0af0a1a91c3f60 [2022-11-03 02:05:36,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:05:36,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:05:36,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:05:36,525 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:05:36,526 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:05:36,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.3.prop1-func-interl.c [2022-11-03 02:05:36,617 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/data/3e974ac0d/7a209908b28c4e6b99a7f3a70af5f79b/FLAGd89e79551 [2022-11-03 02:05:37,132 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:05:37,133 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.3.prop1-func-interl.c [2022-11-03 02:05:37,143 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/data/3e974ac0d/7a209908b28c4e6b99a7f3a70af5f79b/FLAGd89e79551 [2022-11-03 02:05:37,455 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/data/3e974ac0d/7a209908b28c4e6b99a7f3a70af5f79b [2022-11-03 02:05:37,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:05:37,459 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:05:37,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:05:37,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:05:37,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:05:37,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:05:37" (1/1) ... [2022-11-03 02:05:37,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68d926c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:37, skipping insertion in model container [2022-11-03 02:05:37,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:05:37" (1/1) ... [2022-11-03 02:05:37,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:05:37,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:05:37,802 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_886902f8-6782-4b8b-806a-317734063ccb/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.3.prop1-func-interl.c[1014,1027] [2022-11-03 02:05:38,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:05:38,025 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:05:38,037 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_886902f8-6782-4b8b-806a-317734063ccb/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.3.prop1-func-interl.c[1014,1027] [2022-11-03 02:05:38,171 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:05:38,184 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:05:38,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:38 WrapperNode [2022-11-03 02:05:38,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:05:38,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:05:38,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:05:38,186 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:05:38,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:38" (1/1) ... [2022-11-03 02:05:38,222 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:38" (1/1) ... [2022-11-03 02:05:38,344 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 479 [2022-11-03 02:05:38,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:05:38,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:05:38,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:05:38,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:05:38,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:38" (1/1) ... [2022-11-03 02:05:38,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:38" (1/1) ... [2022-11-03 02:05:38,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:38" (1/1) ... [2022-11-03 02:05:38,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:38" (1/1) ... [2022-11-03 02:05:38,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:38" (1/1) ... [2022-11-03 02:05:38,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:38" (1/1) ... [2022-11-03 02:05:38,458 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:38" (1/1) ... [2022-11-03 02:05:38,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:38" (1/1) ... [2022-11-03 02:05:38,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:05:38,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:05:38,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:05:38,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:05:38,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:38" (1/1) ... [2022-11-03 02:05:38,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:05:38,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:38,517 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:05:38,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:05:38,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:05:38,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:05:38,733 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:05:38,735 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:05:44,946 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:05:46,406 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:05:46,406 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:05:46,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:05:46 BoogieIcfgContainer [2022-11-03 02:05:46,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:05:46,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:05:46,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:05:46,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:05:46,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:05:37" (1/3) ... [2022-11-03 02:05:46,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f87867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:05:46, skipping insertion in model container [2022-11-03 02:05:46,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:38" (2/3) ... [2022-11-03 02:05:46,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f87867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:05:46, skipping insertion in model container [2022-11-03 02:05:46,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:05:46" (3/3) ... [2022-11-03 02:05:46,423 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.adding.3.prop1-func-interl.c [2022-11-03 02:05:46,443 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:05:46,443 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:05:46,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:05:46,524 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;@610ed0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:05:46,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:05:46,531 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 02:05:46,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:05:46,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:46,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:05:46,539 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:46,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:46,547 INFO L85 PathProgramCache]: Analyzing trace with hash 4467594, now seen corresponding path program 1 times [2022-11-03 02:05:46,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:46,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901621829] [2022-11-03 02:05:46,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:46,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:05:47,102 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:05:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:05:47,433 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:05:47,439 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:05:47,441 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:05:47,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:05:47,448 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:05:47,452 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:05:47,489 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:05:47,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:05:47 BoogieIcfgContainer [2022-11-03 02:05:47,503 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:05:47,505 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:05:47,506 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:05:47,506 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:05:47,507 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:05:46" (3/4) ... [2022-11-03 02:05:47,512 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:05:47,512 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:05:47,515 INFO L158 Benchmark]: Toolchain (without parser) took 10055.03ms. Allocated memory was 107.0MB in the beginning and 400.6MB in the end (delta: 293.6MB). Free memory was 71.2MB in the beginning and 154.6MB in the end (delta: -83.4MB). Peak memory consumption was 209.3MB. Max. memory is 16.1GB. [2022-11-03 02:05:47,515 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 107.0MB. Free memory is still 88.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:05:47,516 INFO L158 Benchmark]: CACSL2BoogieTranslator took 724.09ms. Allocated memory is still 107.0MB. Free memory was 71.0MB in the beginning and 72.0MB in the end (delta: -981.5kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:05:47,518 INFO L158 Benchmark]: Boogie Procedure Inliner took 158.93ms. Allocated memory is still 107.0MB. Free memory was 72.0MB in the beginning and 59.3MB in the end (delta: 12.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:05:47,519 INFO L158 Benchmark]: Boogie Preprocessor took 131.09ms. Allocated memory is still 107.0MB. Free memory was 59.3MB in the beginning and 52.3MB in the end (delta: 7.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:05:47,527 INFO L158 Benchmark]: RCFGBuilder took 7932.51ms. Allocated memory was 107.0MB in the beginning and 400.6MB in the end (delta: 293.6MB). Free memory was 52.3MB in the beginning and 221.7MB in the end (delta: -169.4MB). Peak memory consumption was 222.3MB. Max. memory is 16.1GB. [2022-11-03 02:05:47,528 INFO L158 Benchmark]: TraceAbstraction took 1088.89ms. Allocated memory is still 400.6MB. Free memory was 220.7MB in the beginning and 155.6MB in the end (delta: 65.0MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. [2022-11-03 02:05:47,529 INFO L158 Benchmark]: Witness Printer took 7.44ms. Allocated memory is still 400.6MB. Free memory was 155.6MB in the beginning and 154.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:05:47,535 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 107.0MB. Free memory is still 88.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 724.09ms. Allocated memory is still 107.0MB. Free memory was 71.0MB in the beginning and 72.0MB in the end (delta: -981.5kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 158.93ms. Allocated memory is still 107.0MB. Free memory was 72.0MB in the beginning and 59.3MB in the end (delta: 12.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 131.09ms. Allocated memory is still 107.0MB. Free memory was 59.3MB in the beginning and 52.3MB in the end (delta: 7.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 7932.51ms. Allocated memory was 107.0MB in the beginning and 400.6MB in the end (delta: 293.6MB). Free memory was 52.3MB in the beginning and 221.7MB in the end (delta: -169.4MB). Peak memory consumption was 222.3MB. Max. memory is 16.1GB. * TraceAbstraction took 1088.89ms. Allocated memory is still 400.6MB. Free memory was 220.7MB in the beginning and 155.6MB in the end (delta: 65.0MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. * Witness Printer took 7.44ms. Allocated memory is still 400.6MB. Free memory was 155.6MB in the beginning and 154.6MB 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 bitwiseOr at line 104, overapproximation of shiftRight at line 108, overapproximation of bitwiseAnd at line 86, overapproximation of bitwiseComplement at line 106, overapproximation of bitwiseXOr at line 101. 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 - 5); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (5 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 16); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (16 - 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_3 var_5 = 0; [L38] const SORT_1 var_12 = 0; [L39] const SORT_4 var_27 = 637; [L40] const SORT_3 var_28 = 1; [L41] const SORT_3 var_30 = 0; [L42] const SORT_4 var_32 = 16; [L43] const SORT_4 var_79 = 300; [L45] SORT_1 input_37; [L46] SORT_1 input_38; [L47] SORT_1 input_43; [L48] SORT_1 input_48; [L49] SORT_1 input_52; [L50] SORT_1 input_57; [L52] SORT_3 state_6 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L53] SORT_3 state_8 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L54] SORT_3 state_10 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L55] SORT_1 state_13 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L56] SORT_1 state_15 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L57] SORT_1 state_17 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L58] SORT_1 state_19 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L59] SORT_1 state_21 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L60] SORT_1 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L61] SORT_1 state_25 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L63] SORT_3 init_7_arg_1 = var_5; [L64] state_6 = init_7_arg_1 [L65] SORT_3 init_9_arg_1 = var_5; [L66] state_8 = init_9_arg_1 [L67] SORT_3 init_11_arg_1 = var_5; [L68] state_10 = init_11_arg_1 [L69] SORT_1 init_14_arg_1 = var_12; [L70] state_13 = init_14_arg_1 [L71] SORT_1 init_16_arg_1 = var_12; [L72] state_15 = init_16_arg_1 [L73] SORT_1 init_18_arg_1 = var_12; [L74] state_17 = init_18_arg_1 [L75] SORT_1 init_20_arg_1 = var_12; [L76] state_19 = init_20_arg_1 [L77] SORT_1 init_22_arg_1 = var_12; [L78] state_21 = init_22_arg_1 [L79] SORT_1 init_24_arg_1 = var_12; [L80] state_23 = init_24_arg_1 [L81] SORT_1 init_26_arg_1 = var_12; [L82] state_25 = init_26_arg_1 VAL [init_11_arg_1=0, init_14_arg_1=0, init_16_arg_1=0, init_18_arg_1=0, init_20_arg_1=0, init_22_arg_1=0, init_24_arg_1=0, init_26_arg_1=0, init_7_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=31, mask_SORT_3=65535, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=16, msb_SORT_3=32768, msb_SORT_4=2147483648, state_10=0, state_13=0, state_15=0, state_17=0, state_19=0, state_21=0, state_23=0, state_25=0, state_6=0, state_8=0, var_12=0, var_27=637, var_28=1, var_30=0, var_32=16, var_5=0, var_79=300] [L85] input_37 = __VERIFIER_nondet_uchar() [L86] input_37 = input_37 & mask_SORT_1 [L87] input_38 = __VERIFIER_nondet_uchar() [L88] input_38 = input_38 & mask_SORT_1 [L89] input_43 = __VERIFIER_nondet_uchar() [L90] input_43 = input_43 & mask_SORT_1 [L91] input_48 = __VERIFIER_nondet_uchar() [L92] input_48 = input_48 & mask_SORT_1 [L93] input_52 = __VERIFIER_nondet_uchar() [L94] input_52 = input_52 & mask_SORT_1 [L95] input_57 = __VERIFIER_nondet_uchar() [L96] input_57 = input_57 & mask_SORT_1 [L99] SORT_3 var_29_arg_0 = var_28; [L100] SORT_3 var_29_arg_1 = state_6; [L101] SORT_3 var_29 = var_29_arg_0 ^ var_29_arg_1; [L102] SORT_3 var_31_arg_0 = var_29; [L103] SORT_3 var_31_arg_1 = var_30; [L104] SORT_4 var_31 = ((SORT_4)var_31_arg_0 << 16) | var_31_arg_1; [L105] SORT_4 var_33_arg_0 = var_31; [L106] EXPR (var_33_arg_0 & msb_SORT_4) ? (var_33_arg_0 | ~mask_SORT_4) : (var_33_arg_0 & mask_SORT_4) [L106] var_33_arg_0 = (var_33_arg_0 & msb_SORT_4) ? (var_33_arg_0 | ~mask_SORT_4) : (var_33_arg_0 & mask_SORT_4) [L107] SORT_4 var_33_arg_1 = var_32; [L108] SORT_4 var_33 = (int)var_33_arg_0 >> var_33_arg_1; [L109] EXPR (var_33_arg_0 & msb_SORT_4) ? (var_33 | ~(mask_SORT_4 >> var_33_arg_1)) : var_33 [L109] var_33 = (var_33_arg_0 & msb_SORT_4) ? (var_33 | ~(mask_SORT_4 >> var_33_arg_1)) : var_33 [L110] var_33 = var_33 & mask_SORT_4 [L111] SORT_4 var_34_arg_0 = var_27; [L112] SORT_4 var_34_arg_1 = var_33; [L113] SORT_1 var_34 = var_34_arg_0 == var_34_arg_1; [L114] SORT_1 var_35_arg_0 = ~state_25; [L115] var_35_arg_0 = var_35_arg_0 & mask_SORT_1 [L116] SORT_1 var_35_arg_1 = var_34; [L117] SORT_1 var_35 = var_35_arg_0 & var_35_arg_1; [L118] var_35 = var_35 & mask_SORT_1 [L119] SORT_1 bad_36_arg_0 = var_35; [L120] CALL __VERIFIER_assert(!(bad_36_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: 1.0s, 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, 0.4s 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 02:05:47,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/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_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.3.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/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_886902f8-6782-4b8b-806a-317734063ccb/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 2c894e1d7fb4f29f2261c2da9b84160dfd404379400898d35a0af0a1a91c3f60 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:05:50,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:05:50,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:05:50,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:05:50,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:05:50,060 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:05:50,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:05:50,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:05:50,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:05:50,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:05:50,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:05:50,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:05:50,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:05:50,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:05:50,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:05:50,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:05:50,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:05:50,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:05:50,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:05:50,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:05:50,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:05:50,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:05:50,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:05:50,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:05:50,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:05:50,125 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:05:50,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:05:50,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:05:50,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:05:50,130 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:05:50,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:05:50,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:05:50,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:05:50,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:05:50,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:05:50,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:05:50,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:05:50,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:05:50,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:05:50,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:05:50,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:05:50,141 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:05:50,185 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:05:50,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:05:50,186 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:05:50,186 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:05:50,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:05:50,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:05:50,188 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:05:50,188 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:05:50,189 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:05:50,189 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:05:50,190 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:05:50,190 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:05:50,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:05:50,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:05:50,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:05:50,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:05:50,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:05:50,193 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:05:50,193 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:05:50,193 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:05:50,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:05:50,194 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:05:50,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:05:50,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:05:50,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:05:50,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:05:50,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:05:50,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:05:50,195 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:05:50,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:05:50,196 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:05:50,196 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:50,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:05:50,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:05:50,197 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:05:50,197 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_886902f8-6782-4b8b-806a-317734063ccb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c894e1d7fb4f29f2261c2da9b84160dfd404379400898d35a0af0a1a91c3f60 [2022-11-03 02:05:50,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:05:50,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:05:50,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:05:50,612 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:05:50,613 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:05:50,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.3.prop1-func-interl.c [2022-11-03 02:05:50,694 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/data/4bc6ec659/10fdff10f98d4d5eb212c87b28f2eb48/FLAG9e6ae52e1 [2022-11-03 02:05:51,391 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:05:51,399 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.3.prop1-func-interl.c [2022-11-03 02:05:51,410 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/data/4bc6ec659/10fdff10f98d4d5eb212c87b28f2eb48/FLAG9e6ae52e1 [2022-11-03 02:05:51,657 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/data/4bc6ec659/10fdff10f98d4d5eb212c87b28f2eb48 [2022-11-03 02:05:51,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:05:51,661 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:05:51,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:05:51,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:05:51,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:05:51,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:05:51" (1/1) ... [2022-11-03 02:05:51,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32edcc11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:51, skipping insertion in model container [2022-11-03 02:05:51,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:05:51" (1/1) ... [2022-11-03 02:05:51,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:05:51,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:05:51,893 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_886902f8-6782-4b8b-806a-317734063ccb/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.3.prop1-func-interl.c[1014,1027] [2022-11-03 02:05:52,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:05:52,122 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:05:52,135 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_886902f8-6782-4b8b-806a-317734063ccb/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.3.prop1-func-interl.c[1014,1027] [2022-11-03 02:05:52,248 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:05:52,272 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:05:52,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:52 WrapperNode [2022-11-03 02:05:52,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:05:52,275 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:05:52,275 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:05:52,276 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:05:52,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:52" (1/1) ... [2022-11-03 02:05:52,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:52" (1/1) ... [2022-11-03 02:05:52,346 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 479 [2022-11-03 02:05:52,346 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:05:52,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:05:52,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:05:52,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:05:52,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:52" (1/1) ... [2022-11-03 02:05:52,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:52" (1/1) ... [2022-11-03 02:05:52,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:52" (1/1) ... [2022-11-03 02:05:52,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:52" (1/1) ... [2022-11-03 02:05:52,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:52" (1/1) ... [2022-11-03 02:05:52,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:52" (1/1) ... [2022-11-03 02:05:52,421 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:52" (1/1) ... [2022-11-03 02:05:52,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:52" (1/1) ... [2022-11-03 02:05:52,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:05:52,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:05:52,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:05:52,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:05:52,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:52" (1/1) ... [2022-11-03 02:05:52,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:05:52,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:52,479 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:05:52,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:05:52,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:05:52,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:05:52,728 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:05:52,731 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:05:53,442 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:05:53,449 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:05:53,450 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:05:53,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:05:53 BoogieIcfgContainer [2022-11-03 02:05:53,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:05:53,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:05:53,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:05:53,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:05:53,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:05:51" (1/3) ... [2022-11-03 02:05:53,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7821a247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:05:53, skipping insertion in model container [2022-11-03 02:05:53,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:52" (2/3) ... [2022-11-03 02:05:53,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7821a247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:05:53, skipping insertion in model container [2022-11-03 02:05:53,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:05:53" (3/3) ... [2022-11-03 02:05:53,475 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.adding.3.prop1-func-interl.c [2022-11-03 02:05:53,519 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:05:53,519 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:05:53,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:05:53,613 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;@5c6e6af1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:05:53,614 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:05:53,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 34 states have internal predecessors, (49), 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 02:05:53,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:05:53,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:53,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:53,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:53,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:53,635 INFO L85 PathProgramCache]: Analyzing trace with hash -332259343, now seen corresponding path program 1 times [2022-11-03 02:05:53,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:53,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589419326] [2022-11-03 02:05:53,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:53,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:53,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:53,669 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:53,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:05:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:53,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:05:53,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:54,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:54,009 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:54,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589419326] [2022-11-03 02:05:54,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589419326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:54,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:54,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:05:54,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736463887] [2022-11-03 02:05:54,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:54,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:05:54,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:54,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:05:54,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:05:54,060 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 34 states have internal predecessors, (49), 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 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 02:05:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:54,179 INFO L93 Difference]: Finished difference Result 66 states and 98 transitions. [2022-11-03 02:05:54,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:05:54,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2022-11-03 02:05:54,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:54,202 INFO L225 Difference]: With dead ends: 66 [2022-11-03 02:05:54,215 INFO L226 Difference]: Without dead ends: 33 [2022-11-03 02:05:54,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:05:54,223 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:54,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 96 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 15 Unchecked, 0.1s Time] [2022-11-03 02:05:54,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-03 02:05:54,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-03 02:05:54,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 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 02:05:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 45 transitions. [2022-11-03 02:05:54,280 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 45 transitions. Word has length 9 [2022-11-03 02:05:54,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:54,281 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 45 transitions. [2022-11-03 02:05:54,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 02:05:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 45 transitions. [2022-11-03 02:05:54,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:05:54,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:54,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:54,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:54,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:05:54,499 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:54,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:54,500 INFO L85 PathProgramCache]: Analyzing trace with hash -275001041, now seen corresponding path program 1 times [2022-11-03 02:05:54,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:54,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337028166] [2022-11-03 02:05:54,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:54,501 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:54,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:54,503 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:54,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:05:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:54,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:05:54,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:54,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:54,875 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:54,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337028166] [2022-11-03 02:05:54,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337028166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:54,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:54,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:05:54,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770348082] [2022-11-03 02:05:54,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:54,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:05:54,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:54,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:05:54,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:05:54,885 INFO L87 Difference]: Start difference. First operand 33 states and 45 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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 02:05:54,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:54,999 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2022-11-03 02:05:55,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:05:55,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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 9 [2022-11-03 02:05:55,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:55,003 INFO L225 Difference]: With dead ends: 64 [2022-11-03 02:05:55,003 INFO L226 Difference]: Without dead ends: 35 [2022-11-03 02:05:55,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:05:55,006 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:55,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 150 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-03 02:05:55,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-03 02:05:55,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-03 02:05:55,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 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 02:05:55,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2022-11-03 02:05:55,016 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 9 [2022-11-03 02:05:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:55,017 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2022-11-03 02:05:55,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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 02:05:55,022 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2022-11-03 02:05:55,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:05:55,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:55,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:55,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:55,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:05:55,236 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:55,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:55,237 INFO L85 PathProgramCache]: Analyzing trace with hash -274941459, now seen corresponding path program 1 times [2022-11-03 02:05:55,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:55,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422242164] [2022-11-03 02:05:55,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:55,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:55,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:55,239 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:55,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:05:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:55,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:05:55,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:55,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:55,718 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:55,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422242164] [2022-11-03 02:05:55,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422242164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:55,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:55,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:05:55,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919954015] [2022-11-03 02:05:55,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:55,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:05:55,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:55,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:05:55,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:05:55,728 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 02:05:55,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:55,850 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2022-11-03 02:05:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:05:55,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 9 [2022-11-03 02:05:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:55,853 INFO L225 Difference]: With dead ends: 65 [2022-11-03 02:05:55,854 INFO L226 Difference]: Without dead ends: 63 [2022-11-03 02:05:55,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:05:55,855 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 39 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:55,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 228 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2022-11-03 02:05:55,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-03 02:05:55,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 37. [2022-11-03 02:05:55,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 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 02:05:55,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-11-03 02:05:55,865 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 9 [2022-11-03 02:05:55,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:55,866 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-11-03 02:05:55,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 02:05:55,866 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-11-03 02:05:55,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:05:55,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:55,869 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:55,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:56,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:05:56,081 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:56,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:56,082 INFO L85 PathProgramCache]: Analyzing trace with hash 649010465, now seen corresponding path program 1 times [2022-11-03 02:05:56,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:56,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232196656] [2022-11-03 02:05:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:56,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:56,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:56,084 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:56,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:05:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:56,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:05:56,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:56,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:56,487 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:56,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232196656] [2022-11-03 02:05:56,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232196656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:56,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:56,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:05:56,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845331463] [2022-11-03 02:05:56,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:56,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:05:56,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:56,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:05:56,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:05:56,490 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 02:05:56,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:56,574 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2022-11-03 02:05:56,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:05:56,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 36 [2022-11-03 02:05:56,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:56,576 INFO L225 Difference]: With dead ends: 72 [2022-11-03 02:05:56,576 INFO L226 Difference]: Without dead ends: 43 [2022-11-03 02:05:56,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:05:56,577 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:56,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 91 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-11-03 02:05:56,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-03 02:05:56,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-03 02:05:56,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 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 02:05:56,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2022-11-03 02:05:56,583 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 36 [2022-11-03 02:05:56,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:56,584 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2022-11-03 02:05:56,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 02:05:56,584 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2022-11-03 02:05:56,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:05:56,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:56,585 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:56,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:56,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:05:56,800 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:56,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:56,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1156427869, now seen corresponding path program 1 times [2022-11-03 02:05:56,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:56,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804770278] [2022-11-03 02:05:56,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:56,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:56,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:56,803 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:56,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:05:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:57,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:05:57,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:57,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:57,239 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:57,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804770278] [2022-11-03 02:05:57,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804770278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:57,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:57,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:05:57,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653683431] [2022-11-03 02:05:57,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:57,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:05:57,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:57,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:05:57,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:05:57,244 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 02:05:57,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:57,341 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2022-11-03 02:05:57,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:05:57,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 36 [2022-11-03 02:05:57,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:57,343 INFO L225 Difference]: With dead ends: 74 [2022-11-03 02:05:57,343 INFO L226 Difference]: Without dead ends: 45 [2022-11-03 02:05:57,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:05:57,344 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:57,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 115 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-03 02:05:57,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-03 02:05:57,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-03 02:05:57,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 44 states have internal predecessors, (59), 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 02:05:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2022-11-03 02:05:57,349 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 36 [2022-11-03 02:05:57,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:57,350 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2022-11-03 02:05:57,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 02:05:57,350 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2022-11-03 02:05:57,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:05:57,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:57,358 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:57,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:57,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:05:57,559 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:57,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:57,559 INFO L85 PathProgramCache]: Analyzing trace with hash -733726043, now seen corresponding path program 1 times [2022-11-03 02:05:57,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:57,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142683582] [2022-11-03 02:05:57,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:57,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:57,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:57,562 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:57,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:05:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:57,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:05:57,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:59,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:59,371 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:59,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142683582] [2022-11-03 02:05:59,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142683582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:59,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:59,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:05:59,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660999273] [2022-11-03 02:05:59,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:59,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:05:59,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:59,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:05:59,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=19, Unknown=1, NotChecked=0, Total=30 [2022-11-03 02:05:59,374 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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 02:05:59,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:59,458 INFO L93 Difference]: Finished difference Result 82 states and 112 transitions. [2022-11-03 02:05:59,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:05:59,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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 36 [2022-11-03 02:05:59,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:59,459 INFO L225 Difference]: With dead ends: 82 [2022-11-03 02:05:59,460 INFO L226 Difference]: Without dead ends: 53 [2022-11-03 02:05:59,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2022-11-03 02:05:59,461 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:59,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 139 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-03 02:05:59,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-03 02:05:59,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-03 02:05:59,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 52 states have internal predecessors, (70), 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 02:05:59,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2022-11-03 02:05:59,466 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 36 [2022-11-03 02:05:59,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:59,467 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2022-11-03 02:05:59,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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 02:05:59,467 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2022-11-03 02:05:59,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:05:59,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:59,469 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:59,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:59,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:05:59,685 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:59,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:59,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1320532057, now seen corresponding path program 1 times [2022-11-03 02:05:59,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:59,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312028842] [2022-11-03 02:05:59,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:59,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:59,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:59,689 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:59,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:06:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:00,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:06:00,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:00,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:00,847 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:06:00,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312028842] [2022-11-03 02:06:00,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312028842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:00,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1547124192] [2022-11-03 02:06:00,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:00,849 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:06:00,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:06:00,852 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:06:00,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-03 02:06:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:01,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:06:01,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:01,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:01,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1547124192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:01,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532582491] [2022-11-03 02:06:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:01,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:01,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:01,882 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:01,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:06:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:02,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:06:02,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:02,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:02,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532582491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:02,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:06:02,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2022-11-03 02:06:02,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466996813] [2022-11-03 02:06:02,595 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:06:02,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:06:02,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:06:02,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:06:02,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:06:02,599 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 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 02:06:02,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:02,869 INFO L93 Difference]: Finished difference Result 103 states and 139 transitions. [2022-11-03 02:06:02,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:06:02,875 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 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 36 [2022-11-03 02:06:02,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:02,876 INFO L225 Difference]: With dead ends: 103 [2022-11-03 02:06:02,876 INFO L226 Difference]: Without dead ends: 74 [2022-11-03 02:06:02,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 196 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:06:02,877 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 22 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:02,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 265 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 163 Unchecked, 0.2s Time] [2022-11-03 02:06:02,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-03 02:06:02,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-03 02:06:02,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 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 02:06:02,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2022-11-03 02:06:02,885 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 36 [2022-11-03 02:06:02,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:02,885 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2022-11-03 02:06:02,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 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 02:06:02,886 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2022-11-03 02:06:02,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:06:02,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:02,887 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] [2022-11-03 02:06:02,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:03,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:03,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:03,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:03,491 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:03,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:03,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1263273755, now seen corresponding path program 1 times [2022-11-03 02:06:03,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:06:03,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744291219] [2022-11-03 02:06:03,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:03,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:06:03,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:06:03,494 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:06:03,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:06:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:03,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:06:03,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:04,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:04,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:04,732 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:06:04,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744291219] [2022-11-03 02:06:04,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744291219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:04,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [258382708] [2022-11-03 02:06:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:04,733 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:06:04,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:06:04,734 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:06:04,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-03 02:06:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:05,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:06:05,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:05,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:05,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:05,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [258382708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:05,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477867671] [2022-11-03 02:06:05,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:05,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:05,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:05,638 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:05,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:06:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:05,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:06:05,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:06:06,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:06:06,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477867671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:06,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-03 02:06:06,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9, 9, 9] total 19 [2022-11-03 02:06:06,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773267598] [2022-11-03 02:06:06,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:06,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:06:06,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:06:06,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:06:06,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:06:06,147 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 02:06:06,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:06,175 INFO L93 Difference]: Finished difference Result 139 states and 188 transitions. [2022-11-03 02:06:06,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:06:06,176 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 36 [2022-11-03 02:06:06,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:06,178 INFO L225 Difference]: With dead ends: 139 [2022-11-03 02:06:06,179 INFO L226 Difference]: Without dead ends: 110 [2022-11-03 02:06:06,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:06:06,180 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:06,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 119 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 43 Unchecked, 0.0s Time] [2022-11-03 02:06:06,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-03 02:06:06,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2022-11-03 02:06:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.355140186915888) internal successors, (145), 107 states have internal predecessors, (145), 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 02:06:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 145 transitions. [2022-11-03 02:06:06,199 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 145 transitions. Word has length 36 [2022-11-03 02:06:06,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:06,202 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 145 transitions. [2022-11-03 02:06:06,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 02:06:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 145 transitions. [2022-11-03 02:06:06,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:06:06,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:06,204 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] [2022-11-03 02:06:06,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:06,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:06,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2022-11-03 02:06:06,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:06:06,805 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:06,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:06,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1263214173, now seen corresponding path program 1 times [2022-11-03 02:06:06,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:06:06,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646472778] [2022-11-03 02:06:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:06,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:06:06,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:06:06,807 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:06:06,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:06:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:07,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:06:07,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:07,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:15,184 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:06:15,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646472778] [2022-11-03 02:06:15,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646472778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:15,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [478103519] [2022-11-03 02:06:15,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:15,185 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:06:15,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:06:15,186 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:06:15,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 02:06:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:15,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:06:15,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:16,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:02,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [478103519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:02,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098121382] [2022-11-03 02:07:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:02,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:02,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:02,988 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:02,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:07:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:03,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:07:03,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:04,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:28,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:28,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098121382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:28,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:07:28,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 37 [2022-11-03 02:07:28,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547698769] [2022-11-03 02:07:28,062 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:07:28,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 02:07:28,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:28,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 02:07:28,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1089, Unknown=29, NotChecked=0, Total=1332 [2022-11-03 02:07:28,064 INFO L87 Difference]: Start difference. First operand 108 states and 145 transitions. Second operand has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 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 02:07:30,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:30,224 INFO L93 Difference]: Finished difference Result 174 states and 237 transitions. [2022-11-03 02:07:30,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:07:30,232 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 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 36 [2022-11-03 02:07:30,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:30,237 INFO L225 Difference]: With dead ends: 174 [2022-11-03 02:07:30,237 INFO L226 Difference]: Without dead ends: 172 [2022-11-03 02:07:30,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 175 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 79.6s TimeCoverageRelationStatistics Valid=404, Invalid=1729, Unknown=29, NotChecked=0, Total=2162 [2022-11-03 02:07:30,241 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 123 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:30,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 703 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 38 Unchecked, 0.0s Time] [2022-11-03 02:07:30,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-03 02:07:30,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-11-03 02:07:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.368421052631579) internal successors, (234), 171 states have internal predecessors, (234), 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 02:07:30,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 234 transitions. [2022-11-03 02:07:30,257 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 234 transitions. Word has length 36 [2022-11-03 02:07:30,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:30,257 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 234 transitions. [2022-11-03 02:07:30,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 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 02:07:30,258 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 234 transitions. [2022-11-03 02:07:30,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:07:30,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:30,259 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] [2022-11-03 02:07:30,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:30,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:30,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:30,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:07:30,875 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:30,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:30,876 INFO L85 PathProgramCache]: Analyzing trace with hash -583155803, now seen corresponding path program 1 times [2022-11-03 02:07:30,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:30,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220722330] [2022-11-03 02:07:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:30,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:30,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:30,878 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:30,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:07:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:31,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:07:31,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:32,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:32,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:39,089 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:39,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220722330] [2022-11-03 02:07:39,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220722330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:39,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1410737470] [2022-11-03 02:07:39,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:39,090 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:07:39,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:07:39,092 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:07:39,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 02:07:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:39,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:07:39,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:40,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:31,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1410737470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:31,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373482411] [2022-11-03 02:08:31,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:31,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:31,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:31,959 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:31,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 02:08:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:32,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:08:32,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:34,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:41,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373482411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:41,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:08:41,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 34 [2022-11-03 02:08:41,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152840061] [2022-11-03 02:08:41,357 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:08:41,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 02:08:41,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:41,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 02:08:41,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=917, Unknown=26, NotChecked=0, Total=1122 [2022-11-03 02:08:41,360 INFO L87 Difference]: Start difference. First operand 172 states and 234 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 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 02:08:42,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:42,985 INFO L93 Difference]: Finished difference Result 310 states and 426 transitions. [2022-11-03 02:08:42,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:08:42,986 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 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 36 [2022-11-03 02:08:42,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:42,988 INFO L225 Difference]: With dead ends: 310 [2022-11-03 02:08:42,988 INFO L226 Difference]: Without dead ends: 308 [2022-11-03 02:08:42,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 180 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 66.2s TimeCoverageRelationStatistics Valid=360, Invalid=1506, Unknown=26, NotChecked=0, Total=1892 [2022-11-03 02:08:42,990 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 182 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:42,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 681 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2022-11-03 02:08:42,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-03 02:08:43,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-11-03 02:08:43,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.3778501628664495) internal successors, (423), 307 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 02:08:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 423 transitions. [2022-11-03 02:08:43,016 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 423 transitions. Word has length 36 [2022-11-03 02:08:43,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:43,017 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 423 transitions. [2022-11-03 02:08:43,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 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 02:08:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 423 transitions. [2022-11-03 02:08:43,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:08:43,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:43,019 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] [2022-11-03 02:08:43,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:43,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:43,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:43,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:43,624 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:43,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:43,625 INFO L85 PathProgramCache]: Analyzing trace with hash -562149595, now seen corresponding path program 1 times [2022-11-03 02:08:43,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:43,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110527352] [2022-11-03 02:08:43,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:43,626 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:43,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:43,627 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:43,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:08:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:43,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:08:43,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:45,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:50,336 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:50,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110527352] [2022-11-03 02:08:50,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110527352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:50,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [267596730] [2022-11-03 02:08:50,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:50,337 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:08:50,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:08:50,340 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:08:50,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 02:08:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:50,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:08:50,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:51,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:50,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [267596730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:50,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294999440] [2022-11-03 02:09:50,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:50,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:50,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:50,778 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:09:50,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 02:09:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:50,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:09:50,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:53,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:23,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294999440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:23,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:10:23,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 37 [2022-11-03 02:10:23,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765226803] [2022-11-03 02:10:23,571 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:10:23,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 02:10:23,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:23,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 02:10:23,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1085, Unknown=37, NotChecked=0, Total=1332 [2022-11-03 02:10:23,573 INFO L87 Difference]: Start difference. First operand 308 states and 423 transitions. Second operand has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 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 02:10:26,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:26,133 INFO L93 Difference]: Finished difference Result 374 states and 515 transitions. [2022-11-03 02:10:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:10:26,133 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 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 36 [2022-11-03 02:10:26,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:26,136 INFO L225 Difference]: With dead ends: 374 [2022-11-03 02:10:26,136 INFO L226 Difference]: Without dead ends: 372 [2022-11-03 02:10:26,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 176 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 96.5s TimeCoverageRelationStatistics Valid=400, Invalid=1725, Unknown=37, NotChecked=0, Total=2162 [2022-11-03 02:10:26,138 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 153 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:26,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 712 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 64 Unchecked, 0.0s Time] [2022-11-03 02:10:26,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-11-03 02:10:26,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2022-11-03 02:10:26,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 1.3800539083557952) internal successors, (512), 371 states have internal predecessors, (512), 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 02:10:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 512 transitions. [2022-11-03 02:10:26,169 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 512 transitions. Word has length 36 [2022-11-03 02:10:26,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:26,169 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 512 transitions. [2022-11-03 02:10:26,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 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 02:10:26,170 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 512 transitions. [2022-11-03 02:10:26,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:10:26,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:26,172 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] [2022-11-03 02:10:26,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:26,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:26,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:26,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:26,788 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:26,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:26,788 INFO L85 PathProgramCache]: Analyzing trace with hash 117908775, now seen corresponding path program 1 times [2022-11-03 02:10:26,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:26,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234908858] [2022-11-03 02:10:26,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:26,789 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:26,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:26,791 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:26,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:10:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:27,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:10:27,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:28,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:37,823 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:37,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234908858] [2022-11-03 02:10:37,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234908858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:37,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1922855895] [2022-11-03 02:10:37,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:37,824 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:10:37,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:10:37,825 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:10:37,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 02:10:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:38,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:10:38,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:39,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:39,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1922855895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:39,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772955518] [2022-11-03 02:11:39,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:39,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:39,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:11:39,388 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:11:39,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 02:11:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:39,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:11:39,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:41,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:50,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772955518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:50,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:11:50,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 34 [2022-11-03 02:11:50,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032462388] [2022-11-03 02:11:50,376 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:11:50,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 02:11:50,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:50,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 02:11:50,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=915, Unknown=29, NotChecked=0, Total=1122 [2022-11-03 02:11:50,377 INFO L87 Difference]: Start difference. First operand 372 states and 512 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 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 02:11:52,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:52,053 INFO L93 Difference]: Finished difference Result 642 states and 886 transitions. [2022-11-03 02:11:52,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:11:52,053 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 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 36 [2022-11-03 02:11:52,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:52,056 INFO L225 Difference]: With dead ends: 642 [2022-11-03 02:11:52,057 INFO L226 Difference]: Without dead ends: 640 [2022-11-03 02:11:52,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 179 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 79.4s TimeCoverageRelationStatistics Valid=363, Invalid=1500, Unknown=29, NotChecked=0, Total=1892 [2022-11-03 02:11:52,058 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 281 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:52,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 700 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 37 Unchecked, 0.0s Time] [2022-11-03 02:11:52,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-11-03 02:11:52,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 640. [2022-11-03 02:11:52,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.381846635367762) internal successors, (883), 639 states have internal predecessors, (883), 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 02:11:52,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 883 transitions. [2022-11-03 02:11:52,111 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 883 transitions. Word has length 36 [2022-11-03 02:11:52,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:52,111 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 883 transitions. [2022-11-03 02:11:52,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 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 02:11:52,112 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 883 transitions. [2022-11-03 02:11:52,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:11:52,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:52,114 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] [2022-11-03 02:11:52,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:52,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:52,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:52,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:52,727 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:52,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:52,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2022867751, now seen corresponding path program 1 times [2022-11-03 02:11:52,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:52,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161859356] [2022-11-03 02:11:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:52,728 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:52,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:52,729 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:52,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:11:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:52,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:11:52,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:54,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:57,855 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:57,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161859356] [2022-11-03 02:11:57,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161859356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:57,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [13850499] [2022-11-03 02:11:57,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:57,855 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:11:57,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:11:57,860 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:11:57,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 02:11:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:58,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:11:58,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:59,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:00,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [13850499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:00,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805090898] [2022-11-03 02:13:00,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:00,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:00,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:13:00,439 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:13:00,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 02:13:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:00,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:13:00,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:02,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:13,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805090898] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:13,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:13:13,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 34 [2022-11-03 02:13:13,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215267866] [2022-11-03 02:13:13,624 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:13:13,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 02:13:13,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:13,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 02:13:13,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=912, Unknown=31, NotChecked=0, Total=1122 [2022-11-03 02:13:13,625 INFO L87 Difference]: Start difference. First operand 640 states and 883 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 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 02:13:15,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:15,360 INFO L93 Difference]: Finished difference Result 778 states and 1075 transitions. [2022-11-03 02:13:15,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:13:15,361 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 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 36 [2022-11-03 02:13:15,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:15,365 INFO L225 Difference]: With dead ends: 778 [2022-11-03 02:13:15,365 INFO L226 Difference]: Without dead ends: 776 [2022-11-03 02:13:15,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 76.9s TimeCoverageRelationStatistics Valid=364, Invalid=1497, Unknown=31, NotChecked=0, Total=1892 [2022-11-03 02:13:15,366 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 308 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:15,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 719 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 34 Unchecked, 0.0s Time] [2022-11-03 02:13:15,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-11-03 02:13:15,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 776. [2022-11-03 02:13:15,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 1.383225806451613) internal successors, (1072), 775 states have internal predecessors, (1072), 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 02:13:15,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1072 transitions. [2022-11-03 02:13:15,413 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1072 transitions. Word has length 36 [2022-11-03 02:13:15,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:15,413 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 1072 transitions. [2022-11-03 02:13:15,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 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 02:13:15,414 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1072 transitions. [2022-11-03 02:13:15,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:13:15,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:15,415 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] [2022-11-03 02:13:15,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:15,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:15,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:16,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:13:16,027 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:16,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:16,027 INFO L85 PathProgramCache]: Analyzing trace with hash 2043873959, now seen corresponding path program 1 times [2022-11-03 02:13:16,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:16,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168728356] [2022-11-03 02:13:16,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:16,028 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:16,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:16,030 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:16,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:13:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:16,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:13:16,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:17,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:24,385 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:24,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168728356] [2022-11-03 02:13:24,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168728356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:24,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1378679828] [2022-11-03 02:13:24,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:24,386 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:13:24,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:13:24,388 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:13:24,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 02:13:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:24,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:13:24,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:25,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:27,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1378679828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:27,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331313709] [2022-11-03 02:14:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:27,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:27,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:14:27,748 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:14:27,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 02:14:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:27,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:14:27,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:30,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:00,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:00,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331313709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:00,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:15:00,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 37 [2022-11-03 02:15:00,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89149224] [2022-11-03 02:15:00,338 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:15:00,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 02:15:00,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:00,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 02:15:00,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1086, Unknown=35, NotChecked=0, Total=1332 [2022-11-03 02:15:00,340 INFO L87 Difference]: Start difference. First operand 776 states and 1072 transitions. Second operand has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 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 02:15:02,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:02,983 INFO L93 Difference]: Finished difference Result 842 states and 1164 transitions. [2022-11-03 02:15:02,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:15:02,984 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 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 36 [2022-11-03 02:15:02,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:02,988 INFO L225 Difference]: With dead ends: 842 [2022-11-03 02:15:02,989 INFO L226 Difference]: Without dead ends: 840 [2022-11-03 02:15:02,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 174 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 100.7s TimeCoverageRelationStatistics Valid=405, Invalid=1722, Unknown=35, NotChecked=0, Total=2162 [2022-11-03 02:15:02,994 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 164 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:02,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 724 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2022-11-03 02:15:02,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-11-03 02:15:03,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 840. [2022-11-03 02:15:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 1.3837902264600714) internal successors, (1161), 839 states have internal predecessors, (1161), 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 02:15:03,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1161 transitions. [2022-11-03 02:15:03,049 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1161 transitions. Word has length 36 [2022-11-03 02:15:03,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:03,050 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 1161 transitions. [2022-11-03 02:15:03,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 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 02:15:03,050 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1161 transitions. [2022-11-03 02:15:03,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:15:03,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:03,052 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] [2022-11-03 02:15:03,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:03,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:03,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:03,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:03,668 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:03,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:03,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1571034967, now seen corresponding path program 1 times [2022-11-03 02:15:03,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:03,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238348189] [2022-11-03 02:15:03,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:03,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:03,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:03,671 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:03,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:15:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:03,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:15:03,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:05,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:13,742 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:13,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238348189] [2022-11-03 02:15:13,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238348189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:13,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [648317945] [2022-11-03 02:15:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:13,743 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:13,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:13,747 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:13,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 02:15:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:14,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:15:14,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:15,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:12,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:12,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [648317945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:12,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766827296] [2022-11-03 02:16:12,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:12,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:12,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:12,842 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:16:12,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-03 02:16:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:13,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:16:13,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:15,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:25,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766827296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:25,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:16:25,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 34 [2022-11-03 02:16:25,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699980121] [2022-11-03 02:16:25,917 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:16:25,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 02:16:25,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:25,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 02:16:25,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=916, Unknown=25, NotChecked=0, Total=1122 [2022-11-03 02:16:25,918 INFO L87 Difference]: Start difference. First operand 840 states and 1161 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 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 02:16:27,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:27,920 INFO L93 Difference]: Finished difference Result 1358 states and 1880 transitions. [2022-11-03 02:16:27,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:16:27,921 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 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 36 [2022-11-03 02:16:27,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:27,926 INFO L225 Difference]: With dead ends: 1358 [2022-11-03 02:16:27,926 INFO L226 Difference]: Without dead ends: 1356 [2022-11-03 02:16:27,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 179 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 78.0s TimeCoverageRelationStatistics Valid=366, Invalid=1501, Unknown=25, NotChecked=0, Total=1892 [2022-11-03 02:16:27,928 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 226 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:27,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 793 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 52 Unchecked, 0.0s Time] [2022-11-03 02:16:27,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2022-11-03 02:16:28,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1356. [2022-11-03 02:16:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 1.3852398523985239) internal successors, (1877), 1355 states have internal predecessors, (1877), 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 02:16:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 1877 transitions. [2022-11-03 02:16:28,053 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 1877 transitions. Word has length 36 [2022-11-03 02:16:28,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:28,053 INFO L495 AbstractCegarLoop]: Abstraction has 1356 states and 1877 transitions. [2022-11-03 02:16:28,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 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 02:16:28,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 1877 transitions. [2022-11-03 02:16:28,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:16:28,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:28,056 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] [2022-11-03 02:16:28,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:28,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:28,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:28,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:28,661 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:28,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:28,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1135584427, now seen corresponding path program 1 times [2022-11-03 02:16:28,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:28,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786995482] [2022-11-03 02:16:28,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:28,662 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:28,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:28,663 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:28,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 02:16:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:28,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:16:28,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:30,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:39,253 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:39,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786995482] [2022-11-03 02:16:39,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786995482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:39,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [967535917] [2022-11-03 02:16:39,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:39,253 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:16:39,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:16:39,254 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:16:39,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 02:16:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:39,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:16:39,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:40,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:32,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [967535917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:32,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510296803] [2022-11-03 02:17:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:32,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:17:32,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:17:32,211 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:17:32,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-03 02:17:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:32,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:17:32,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:34,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:17,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510296803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:17,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:18:17,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 34 [2022-11-03 02:18:17,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307541214] [2022-11-03 02:18:17,384 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:18:17,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 02:18:17,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:17,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 02:18:17,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=900, Unknown=40, NotChecked=0, Total=1122 [2022-11-03 02:18:17,386 INFO L87 Difference]: Start difference. First operand 1356 states and 1877 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 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 02:18:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:19,220 INFO L93 Difference]: Finished difference Result 1418 states and 1963 transitions. [2022-11-03 02:18:19,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:18:19,220 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 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 36 [2022-11-03 02:18:19,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:19,225 INFO L225 Difference]: With dead ends: 1418 [2022-11-03 02:18:19,225 INFO L226 Difference]: Without dead ends: 1416 [2022-11-03 02:18:19,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 104.3s TimeCoverageRelationStatistics Valid=319, Invalid=1363, Unknown=40, NotChecked=0, Total=1722 [2022-11-03 02:18:19,227 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 241 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:19,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 872 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 37 Unchecked, 0.0s Time] [2022-11-03 02:18:19,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2022-11-03 02:18:19,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 720. [2022-11-03 02:18:19,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 1.383866481223922) internal successors, (995), 719 states have internal predecessors, (995), 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 02:18:19,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 995 transitions. [2022-11-03 02:18:19,295 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 995 transitions. Word has length 36 [2022-11-03 02:18:19,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:19,295 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 995 transitions. [2022-11-03 02:18:19,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 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 02:18:19,296 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 995 transitions. [2022-11-03 02:18:19,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:18:19,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:19,297 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:19,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:19,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:19,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:19,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:19,916 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:19,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:19,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1179983447, now seen corresponding path program 1 times [2022-11-03 02:18:19,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:19,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713886314] [2022-11-03 02:18:19,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:19,917 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:19,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:19,919 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:19,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 02:18:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:20,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:18:20,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:21,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:22,767 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:22,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713886314] [2022-11-03 02:18:22,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713886314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:22,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [130309804] [2022-11-03 02:18:22,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:22,768 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:18:22,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:18:22,769 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:18:22,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 02:18:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:23,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:18:23,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:23,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:24,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [130309804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:24,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813270880] [2022-11-03 02:18:24,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:24,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:24,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:24,261 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:24,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-03 02:18:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:24,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:18:24,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:25,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:25,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813270880] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:25,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:18:25,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2022-11-03 02:18:25,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758312286] [2022-11-03 02:18:25,503 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:18:25,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 02:18:25,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:25,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 02:18:25,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:18:25,505 INFO L87 Difference]: Start difference. First operand 720 states and 995 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 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 02:18:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:27,043 INFO L93 Difference]: Finished difference Result 939 states and 1268 transitions. [2022-11-03 02:18:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:18:27,044 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 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 36 [2022-11-03 02:18:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:27,047 INFO L225 Difference]: With dead ends: 939 [2022-11-03 02:18:27,048 INFO L226 Difference]: Without dead ends: 910 [2022-11-03 02:18:27,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:18:27,049 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 214 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:27,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 703 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 175 Invalid, 0 Unknown, 322 Unchecked, 0.8s Time] [2022-11-03 02:18:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-11-03 02:18:27,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 738. [2022-11-03 02:18:27,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 1.3826322930800543) internal successors, (1019), 737 states have internal predecessors, (1019), 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 02:18:27,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1019 transitions. [2022-11-03 02:18:27,142 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1019 transitions. Word has length 36 [2022-11-03 02:18:27,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:27,142 INFO L495 AbstractCegarLoop]: Abstraction has 738 states and 1019 transitions. [2022-11-03 02:18:27,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 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 02:18:27,142 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1019 transitions. [2022-11-03 02:18:27,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:18:27,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:27,144 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] [2022-11-03 02:18:27,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2022-11-03 02:18:27,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:27,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-03 02:18:27,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:27,756 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:27,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:27,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1122665563, now seen corresponding path program 1 times [2022-11-03 02:18:27,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:27,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963856425] [2022-11-03 02:18:27,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:27,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:27,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:27,758 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:27,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 02:18:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:27,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:18:27,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:29,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:37,079 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:37,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963856425] [2022-11-03 02:18:37,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963856425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:37,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1394471093] [2022-11-03 02:18:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:37,080 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:18:37,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:18:37,082 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:18:37,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-03 02:18:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:37,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:18:37,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:38,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:32,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1394471093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:32,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411344887] [2022-11-03 02:19:32,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:32,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:32,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:32,709 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:32,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-03 02:19:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:32,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:19:32,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:34,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:18,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411344887] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:18,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:20:18,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 34 [2022-11-03 02:20:18,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005597208] [2022-11-03 02:20:18,966 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:20:18,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 02:20:18,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:20:18,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 02:20:18,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=900, Unknown=43, NotChecked=0, Total=1122 [2022-11-03 02:20:18,968 INFO L87 Difference]: Start difference. First operand 738 states and 1019 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 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 02:20:20,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:20,744 INFO L93 Difference]: Finished difference Result 816 states and 1128 transitions. [2022-11-03 02:20:20,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:20:20,745 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 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 36 [2022-11-03 02:20:20,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:20,748 INFO L225 Difference]: With dead ends: 816 [2022-11-03 02:20:20,748 INFO L226 Difference]: Without dead ends: 814 [2022-11-03 02:20:20,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 106.9s TimeCoverageRelationStatistics Valid=316, Invalid=1363, Unknown=43, NotChecked=0, Total=1722 [2022-11-03 02:20:20,750 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 96 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:20,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 812 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 37 Unchecked, 0.0s Time] [2022-11-03 02:20:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-11-03 02:20:20,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 726. [2022-11-03 02:20:20,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.3820689655172413) internal successors, (1002), 725 states have internal predecessors, (1002), 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 02:20:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1002 transitions. [2022-11-03 02:20:20,826 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1002 transitions. Word has length 36 [2022-11-03 02:20:20,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:20,826 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 1002 transitions. [2022-11-03 02:20:20,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 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 02:20:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1002 transitions. [2022-11-03 02:20:20,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:20:20,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:20:20,828 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] [2022-11-03 02:20:20,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:21,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:21,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:21,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:20:21,444 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:20:21,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:20:21,445 INFO L85 PathProgramCache]: Analyzing trace with hash -442607193, now seen corresponding path program 1 times [2022-11-03 02:20:21,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:20:21,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533337106] [2022-11-03 02:20:21,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:21,446 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:20:21,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:20:21,446 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:20:21,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 02:20:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:21,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:20:21,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:23,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:29,436 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:20:29,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533337106] [2022-11-03 02:20:29,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533337106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:29,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [615863849] [2022-11-03 02:20:29,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:29,436 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:20:29,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:20:29,437 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:20:29,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_886902f8-6782-4b8b-806a-317734063ccb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-03 02:20:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:29,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:20:29,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:30,836 INFO L328 TraceCheckSpWp]: Computing backward predicates...